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Merge pull request #545 from bocoup/generation

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Introduce test generation tool
This commit is contained in:
Leo Balter 2016-04-15 17:56:36 -04:00
commit 3723e7caeb
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34
CONTRIBUTING.md
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@ -246,3 +246,37 @@ p.then(function () {
``` ```
As above, exceptions that are thrown from a `then` clause are passed to a later `$DONE` function and reported asynchronously. As above, exceptions that are thrown from a `then` clause are passed to a later `$DONE` function and reported asynchronously.
## Procedurally-generated tests
Some language features are expressed through a number of distinct syntactic forms. Test262 maintains these tests as a set of "test cases" and "test templates" in order to ensure equivalent coverage across all forms. The sub-directories within the `src/` directory describe the various language features that benefit from this approach.
Test cases and test templates specify meta-data using the same YAML frontmatter pattern as so-called "static" (i.e. non-generated) tests. The expected attributes differ between test cases and test templates:
- test cases (`*.case`)
- `template` - name of the sub-directory to locate templates for this test
- `description` (see above)
- `info` (see above)
- `features` (see above; merged with value defined by test template)
- test templates (`*.template`)
- `path` - location within the published test hierarchy to output files created from this template
- `name` - human-readable name of the syntactic form described by this template (used to generate the test file's `description` field)
- `esid` (see above)
- `es5id` (see above)
- `es6id` (see above)
- `info` (see above)
- `features` (see above; merged with value defined by test case)
Generated files are managed using the `make.py` Python script located in the root of this repository.
To create files:
make.py
To remove all generated files:
make.py clean
The executable located at `tools/generation/generator.py` offers additional control over the generation procedure.
./tools/generation/generator.py --help

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make.py Executable file
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@ -0,0 +1,57 @@
#!/usr/bin/env python
# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
import os, shutil, subprocess, sys
OUT_DIR = os.environ.get('OUT_DIR') or 'test'
SRC_DIR = os.environ.get('SRC_DIR') or 'src'
def shell(*args):
sp = subprocess.Popen(list(args), stdout=subprocess.PIPE)
cmd_str = ' '.join(args)
print '> ' + cmd_str
for line in iter(sp.stdout.readline, ''):
sys.stdout.write(line)
sp.communicate()
if sp.returncode == 1:
raise Exception('Command failed: ' + cmd_str)
targets = dict()
def target(*deps):
def other(orig):
def wrapped():
print 'Running target: ' + orig.__name__
for dep in deps:
targets[dep]()
return orig()
wrapped.__name__ = orig.__name__
targets[orig.__name__] = wrapped
return wrapped
return other
@target()
def build():
shell(sys.executable, 'tools/generation/generator.py',
'create',
'--out', OUT_DIR,
SRC_DIR)
@target()
def clean():
shell(sys.executable, 'tools/generation/generator.py', 'clean', OUT_DIR)
if len(sys.argv) == 1:
targets['build']()
for target in sys.argv[1:]:
if not target in targets:
sys.stderr.write('No target named: "' + target + '".\n' +
'Available targets: ' + ', '.join(list(targets)) + '\n')
sys.exit(1)
targets[target]()

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: SingleNameBinding with normal value iteration
template: default
info: |
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
//- elems
[x, y, z]
//- vals
[1, 2, 3]
//- body
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/arrow-function/dstr-
name: arrow function expression
es6id: 14.2.16
info: |
ArrowFunction : ArrowParameters => ConciseBody
[...]
4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var f;
f = (/*{ elems }*/) => {
/*{ body }*/
callCount = callCount + 1;
};
f(/*{ vals }*/);
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/class/dstr-gen-meth-static-
name: static class expression generator method
es6id: 14.5.15
info: |
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation for
m with arguments F and false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod : * PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
class C {
static *method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
C.method(/*{ vals }*/).next();
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/class/dstr-gen-meth-
name: class expression method
es6id: 14.5.16
info: |
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod : * PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
class C {
*method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
new C().method(/*{ vals }*/).next();
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/class/dstr-meth-static-
name: static class expression method
es6id: 14.5.15
info: |
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation for
m with arguments F and false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
class C {
static method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
C.method(/*{ vals }*/);
assert.sameValue(callCount, 1);

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@ -0,0 +1,67 @@
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/class/dstr-meth-
name: class expression method
es6id: 14.5.15
info: |
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
class C {
method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
new C().method(/*{ vals }*/);
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/class/dstr-gen-meth-static-
name: static class expression generator method
es6id: 14.5.16
info: |
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation
for m with arguments F and false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod :
* PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var C = class {
static *method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
C.method(/*{ vals }*/).next();
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/class/dstr-gen-meth-
name: class expression method
es6id: 14.5.16
info: |
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod :
* PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var C = class {
*method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
new C().method(/*{ vals }*/).next();
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/class/dstr-meth-static-
name: static class expression method
es6id: 14.5.16
info: |
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation for
m with arguments F and false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var C = class {
static method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
C.method(/*{ vals }*/);
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/class/dstr-meth-
name: class expression method
es6id: 14.5.16
info: |
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var C = class {
method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
new C().method(/*{ vals }*/);
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/const/dstr-
name: >
`const` statement
es6id: 13.3.1.4
info: |
LexicalBinding : BindingPattern Initializer
1. Let rhs be the result of evaluating Initializer.
2. Let value be GetValue(rhs).
3. ReturnIfAbrupt(value).
4. Let env be the running execution context's LexicalEnvironment.
5. Return the result of performing BindingInitialization for BindingPattern
using value and env as the arguments.
---*/
const /*{ elems }*/ = /*{ vals }*/;
/*{ body }*/

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/function/dstr-
name: function declaration
es6id: 14.1.19
info: |
FunctionDeclaration :
function BindingIdentifier ( FormalParameters ) { FunctionBody }
[...]
3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
function f(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
};
f(/*{ vals }*/);
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/function/dstr-
name: function expression
es6id: 14.1.20
info: |
FunctionExpression : function ( FormalParameters ) { FunctionBody }
[...]
3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var f;
f = function(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
};
f(/*{ vals }*/);
assert.sameValue(callCount, 1);

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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/generators/dstr-
name: generator function declaration
es6id: 14.4.12
info: |
GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
[...]
2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
GeneratorBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
function* f(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
};
f(/*{ vals }*/).next();
assert.sameValue(callCount, 1);

47
src/dstr-binding/default/gen-func-expr.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/generators/dstr-
name: generator function expression
es6id: 14.4.14
info: |
GeneratorExpression : function * ( FormalParameters ) { GeneratorBody }
[...]
3. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
GeneratorBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var f;
f = function*(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
};
f(/*{ vals }*/).next();
assert.sameValue(callCount, 1);

53
src/dstr-binding/default/gen-meth.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/object/dstr-gen-meth-
name: generator method
es6id: 14.4.13
info: |
GeneratorMethod :
* PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var obj = {
*method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
obj.method(/*{ vals }*/).next();
assert.sameValue(callCount, 1);

21
src/dstr-binding/default/let-stmt.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/let/dstr-
name: >
`let` statement
es6id: 13.3.1.4
info: |
LexicalBinding : BindingPattern Initializer
1. Let rhs be the result of evaluating Initializer.
2. Let value be GetValue(rhs).
3. ReturnIfAbrupt(value).
4. Let env be the running execution context's LexicalEnvironment.
5. Return the result of performing BindingInitialization for BindingPattern
using value and env as the arguments.
---*/
let /*{ elems }*/ = /*{ vals }*/;
/*{ body }*/

50
src/dstr-binding/default/meth.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/object/dstr-meth-
name: method
es6id: 14.3.8
info: |
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters,
FunctionBody, scope, strict). If functionPrototype was passed as a
parameter then pass its value as the functionPrototype optional argument
of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
var obj = {
method(/*{ elems }*/) {
/*{ body }*/
callCount = callCount + 1;
}
};
obj.method(/*{ vals }*/);
assert.sameValue(callCount, 1);

20
src/dstr-binding/default/var-stmt.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/statements/variable/dstr-
name: >
`var` statement
es6id: 13.3.2.4
info: |
VariableDeclaration : BindingPattern Initializer
1. Let rhs be the result of evaluating Initializer.
2. Let rval be GetValue(rhs).
3. ReturnIfAbrupt(rval).
4. Return the result of performing BindingInitialization for
BindingPattern passing rval and undefined as arguments.
---*/
var /*{ elems }*/ = /*{ vals }*/;
/*{ body }*/

28
src/spread/default/call-expr.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/call/spread-
name: CallExpression
es6id: 12.3.4.1
info: |
CallExpression : MemberExpression Arguments
[...]
9. Return EvaluateDirectCall(func, thisValue, Arguments, tailCall).
12.3.4.3 Runtime Semantics: EvaluateDirectCall
1. Let argList be ArgumentListEvaluation(arguments).
[...]
6. Let result be Call(func, thisValue, argList).
[...]
---*/
var callCount = 0;
(function(/*{ params }*/) {
/*{ body }*/
callCount += 1;
}(/*{ args }*/));
assert.sameValue(callCount, 1);

28
src/spread/default/member-expr.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/new/spread-
name: >
`new` operator
es6id: 12.3.3.1
info: |
MemberExpression : new MemberExpression Arguments
1. Return EvaluateNew(MemberExpression, Arguments).
12.3.3.1.1 Runtime Semantics: EvaluateNew
6. If arguments is empty, let argList be an empty List.
7. Else,
a. Let argList be ArgumentListEvaluation of arguments.
[...]
---*/
var callCount = 0;
new function(/*{ params }*/) {
/*{ body }*/
callCount += 1;
}(/*{ args }*/);
assert.sameValue(callCount, 1);

34
src/spread/default/super-call.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/super/spread-
name: SuperCall
es6id: 12.3.5.1
info: |
SuperCall : super Arguments
1. Let newTarget be GetNewTarget().
2. If newTarget is undefined, throw a ReferenceError exception.
3. Let func be GetSuperConstructor().
4. ReturnIfAbrupt(func).
5. Let argList be ArgumentListEvaluation of Arguments.
[...]
---*/
var callCount = 0;
class Test262ParentClass {
constructor(/*{ params }*/) {
/*{ body }*/
callCount += 1;
}
}
class Test262ChildClass extends Test262ParentClass {
constructor() {
super(/*{ args }*/);
}
}
new Test262ChildClass();
assert.sameValue(callCount, 1);

23
src/spread/error/call-expr.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/call/spread-err-
name: CallExpression
es6id: 12.3.4.1
info: |
CallExpression : MemberExpression Arguments
[...]
9. Return EvaluateDirectCall(func, thisValue, Arguments, tailCall).
12.3.4.3 Runtime Semantics: EvaluateDirectCall
1. Let argList be ArgumentListEvaluation(arguments).
[...]
6. Let result be Call(func, thisValue, argList).
[...]
---*/
assert.throws(/*{ error }*/, function() {
(function(/*{ params }*/) {}(/*{ args }*/));
});

23
src/spread/error/member-expr.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/new/spread-err-
name: >
`new` operator
es6id: 12.3.3.1
info: |
MemberExpression : new MemberExpression Arguments
1. Return EvaluateNew(MemberExpression, Arguments).
12.3.3.1.1 Runtime Semantics: EvaluateNew
6. If arguments is empty, let argList be an empty List.
7. Else,
a. Let argList be ArgumentListEvaluation of arguments.
[...]
---*/
assert.throws(/*{ error }*/, function() {
new function(/*{ params }*/) {}(/*{ args }*/);
});

30
src/spread/error/super-call.template Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
path: language/expressions/super/spread-err-
name: SuperCall
es6id: 12.3.5.1
info: |
SuperCall : super Arguments
1. Let newTarget be GetNewTarget().
2. If newTarget is undefined, throw a ReferenceError exception.
3. Let func be GetSuperConstructor().
4. ReturnIfAbrupt(func).
5. Let argList be ArgumentListEvaluation of Arguments.
[...]
---*/
class Test262ParentClass {
constructor(/*{ params }*/) {}
}
class Test262ChildClass extends Test262ParentClass {
constructor() {
super(/*{ args }*/);
}
}
assert.throws(/*{ error }*/, function() {
new Test262ChildClass();
});

22
src/spread/sngl-err-expr-throws.case Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: Spread operator applied to the only argument when evaluation throws
template: error
features: [generators]
info: |
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
---*/
//- error
Test262Error
//- args
...function*() { throw new Test262Error(); }()

42
src/spread/sngl-iter.case Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: Spread operator applied to the only argument with a valid iterator
template: default
features: [Symbol.iterator]
info: |
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
6. Repeat
a. Let next be IteratorStep(iterator).
b. ReturnIfAbrupt(next).
c. If next is false, return list.
d. Let nextArg be IteratorValue(next).
e. ReturnIfAbrupt(nextArg).
f. Append nextArg as the last element of list.
---*/
//- setup
var iter = {};
iter[Symbol.iterator] = function() {
var callCount = 0;
return {
next: function() {
callCount += 1;
return { done: callCount === 3, value: callCount };
}
};
};
//- args
...iter
//- body
assert.sameValue(arguments.length, 2);
assert.sameValue(arguments[0], 1);
assert.sameValue(arguments[1], 2);

69
test/language/expressions/arrow-function/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/arrow-function.template
/*---
description: SingleNameBinding with normal value iteration (arrow function expression)
es6id: 14.2.16
flags: [generated]
info: >
ArrowFunction : ArrowParameters => ConciseBody
[...]
4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var f;
f = ([x, y, z]) => {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
};
f([1, 2, 3]);
assert.sameValue(callCount, 1);

36
test/language/expressions/call/spread-err-sngl-err-expr-throws.js Normal file
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// This file was procedurally generated from the following sources:
// - src/spread/sngl-err-expr-throws.case
// - src/spread/error/call-expr.template
/*---
description: Spread operator applied to the only argument when evaluation throws (CallExpression)
es6id: 12.3.4.1
features: [generators]
flags: [generated]
info: >
CallExpression : MemberExpression Arguments
[...]
9. Return EvaluateDirectCall(func, thisValue, Arguments, tailCall).
12.3.4.3 Runtime Semantics: EvaluateDirectCall
1. Let argList be ArgumentListEvaluation(arguments).
[...]
6. Let result be Call(func, thisValue, argList).
[...]
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
---*/
assert.throws(Test262Error, function() {
(function() {}(...function*() { throw new Test262Error(); }()));
});

60
test/language/expressions/call/spread-sngl-iter.js Normal file
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// This file was procedurally generated from the following sources:
// - src/spread/sngl-iter.case
// - src/spread/default/call-expr.template
/*---
description: Spread operator applied to the only argument with a valid iterator (CallExpression)
es6id: 12.3.4.1
features: [Symbol.iterator]
flags: [generated]
info: >
CallExpression : MemberExpression Arguments
[...]
9. Return EvaluateDirectCall(func, thisValue, Arguments, tailCall).
12.3.4.3 Runtime Semantics: EvaluateDirectCall
1. Let argList be ArgumentListEvaluation(arguments).
[...]
6. Let result be Call(func, thisValue, argList).
[...]
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
6. Repeat
a. Let next be IteratorStep(iterator).
b. ReturnIfAbrupt(next).
c. If next is false, return list.
d. Let nextArg be IteratorValue(next).
e. ReturnIfAbrupt(nextArg).
f. Append nextArg as the last element of list.
---*/
var iter = {};
iter[Symbol.iterator] = function() {
var callCount = 0;
return {
next: function() {
callCount += 1;
return { done: callCount === 3, value: callCount };
}
};
};
var callCount = 0;
(function() {
assert.sameValue(arguments.length, 2);
assert.sameValue(arguments[0], 1);
assert.sameValue(arguments[1], 2);
callCount += 1;
}(...iter));
assert.sameValue(callCount, 1);

94
test/language/expressions/class/dstr-gen-meth-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-expr-gen-meth.template
/*---
description: SingleNameBinding with normal value iteration (class expression method)
es6id: 14.5.16
flags: [generated]
info: >
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod :
* PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var C = class {
*method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
new C().method([1, 2, 3]).next();
assert.sameValue(callCount, 1);

94
test/language/expressions/class/dstr-gen-meth-static-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-expr-gen-meth-static.template
/*---
description: SingleNameBinding with normal value iteration (static class expression generator method)
es6id: 14.5.16
flags: [generated]
info: >
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation
for m with arguments F and false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod :
* PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var C = class {
static *method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
C.method([1, 2, 3]).next();
assert.sameValue(callCount, 1);

91
test/language/expressions/class/dstr-meth-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-expr-meth.template
/*---
description: SingleNameBinding with normal value iteration (class expression method)
es6id: 14.5.16
flags: [generated]
info: >
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var C = class {
method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
new C().method([1, 2, 3]);
assert.sameValue(callCount, 1);

91
test/language/expressions/class/dstr-meth-static-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-expr-meth-static.template
/*---
description: SingleNameBinding with normal value iteration (static class expression method)
es6id: 14.5.16
flags: [generated]
info: >
ClassExpression : class BindingIdentifieropt ClassTail
1. If BindingIdentifieropt is not present, let className be undefined.
2. Else, let className be StringValue of BindingIdentifier.
3. Let value be the result of ClassDefinitionEvaluation of ClassTail
with argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation for
m with arguments F and false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var C = class {
static method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
C.method([1, 2, 3]);
assert.sameValue(callCount, 1);

70
test/language/expressions/function/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/func-expr.template
/*---
description: SingleNameBinding with normal value iteration (function expression)
es6id: 14.1.20
flags: [generated]
info: >
FunctionExpression : function ( FormalParameters ) { FunctionBody }
[...]
3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var f;
f = function([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
};
f([1, 2, 3]);
assert.sameValue(callCount, 1);

70
test/language/expressions/generators/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/gen-func-expr.template
/*---
description: SingleNameBinding with normal value iteration (generator function expression)
es6id: 14.4.14
flags: [generated]
info: >
GeneratorExpression : function * ( FormalParameters ) { GeneratorBody }
[...]
3. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
GeneratorBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var f;
f = function*([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
};
f([1, 2, 3]).next();
assert.sameValue(callCount, 1);

35
test/language/expressions/new/spread-err-sngl-err-expr-throws.js Normal file
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// This file was procedurally generated from the following sources:
// - src/spread/sngl-err-expr-throws.case
// - src/spread/error/member-expr.template
/*---
description: Spread operator applied to the only argument when evaluation throws (`new` operator)
es6id: 12.3.3.1
features: [generators]
flags: [generated]
info: >
MemberExpression : new MemberExpression Arguments
1. Return EvaluateNew(MemberExpression, Arguments).
12.3.3.1.1 Runtime Semantics: EvaluateNew
6. If arguments is empty, let argList be an empty List.
7. Else,
a. Let argList be ArgumentListEvaluation of arguments.
[...]
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
---*/
assert.throws(Test262Error, function() {
new function() {}(...function*() { throw new Test262Error(); }());
});

59
test/language/expressions/new/spread-sngl-iter.js Normal file
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// This file was procedurally generated from the following sources:
// - src/spread/sngl-iter.case
// - src/spread/default/member-expr.template
/*---
description: Spread operator applied to the only argument with a valid iterator (`new` operator)
es6id: 12.3.3.1
features: [Symbol.iterator]
flags: [generated]
info: >
MemberExpression : new MemberExpression Arguments
1. Return EvaluateNew(MemberExpression, Arguments).
12.3.3.1.1 Runtime Semantics: EvaluateNew
6. If arguments is empty, let argList be an empty List.
7. Else,
a. Let argList be ArgumentListEvaluation of arguments.
[...]
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
6. Repeat
a. Let next be IteratorStep(iterator).
b. ReturnIfAbrupt(next).
c. If next is false, return list.
d. Let nextArg be IteratorValue(next).
e. ReturnIfAbrupt(nextArg).
f. Append nextArg as the last element of list.
---*/
var iter = {};
iter[Symbol.iterator] = function() {
var callCount = 0;
return {
next: function() {
callCount += 1;
return { done: callCount === 3, value: callCount };
}
};
};
var callCount = 0;
new function() {
assert.sameValue(arguments.length, 2);
assert.sameValue(arguments[0], 1);
assert.sameValue(arguments[1], 2);
callCount += 1;
}(...iter);
assert.sameValue(callCount, 1);

76
test/language/expressions/object/dstr-gen-meth-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/gen-meth.template
/*---
description: SingleNameBinding with normal value iteration (generator method)
es6id: 14.4.13
flags: [generated]
info: >
GeneratorMethod :
* PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var obj = {
*method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
obj.method([1, 2, 3]).next();
assert.sameValue(callCount, 1);

73
test/language/expressions/object/dstr-meth-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/meth.template
/*---
description: SingleNameBinding with normal value iteration (method)
es6id: 14.3.8
flags: [generated]
info: >
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters,
FunctionBody, scope, strict). If functionPrototype was passed as a
parameter then pass its value as the functionPrototype optional argument
of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
var obj = {
method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
obj.method([1, 2, 3]);
assert.sameValue(callCount, 1);

43
test/language/expressions/super/spread-err-sngl-err-expr-throws.js Normal file
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// This file was procedurally generated from the following sources:
// - src/spread/sngl-err-expr-throws.case
// - src/spread/error/super-call.template
/*---
description: Spread operator applied to the only argument when evaluation throws (SuperCall)
es6id: 12.3.5.1
features: [generators]
flags: [generated]
info: >
SuperCall : super Arguments
1. Let newTarget be GetNewTarget().
2. If newTarget is undefined, throw a ReferenceError exception.
3. Let func be GetSuperConstructor().
4. ReturnIfAbrupt(func).
5. Let argList be ArgumentListEvaluation of Arguments.
[...]
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
---*/
class Test262ParentClass {
constructor() {}
}
class Test262ChildClass extends Test262ParentClass {
constructor() {
super(...function*() { throw new Test262Error(); }());
}
}
assert.throws(Test262Error, function() {
new Test262ChildClass();
});

66
test/language/expressions/super/spread-sngl-iter.js Normal file
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// This file was procedurally generated from the following sources:
// - src/spread/sngl-iter.case
// - src/spread/default/super-call.template
/*---
description: Spread operator applied to the only argument with a valid iterator (SuperCall)
es6id: 12.3.5.1
features: [Symbol.iterator]
flags: [generated]
info: >
SuperCall : super Arguments
1. Let newTarget be GetNewTarget().
2. If newTarget is undefined, throw a ReferenceError exception.
3. Let func be GetSuperConstructor().
4. ReturnIfAbrupt(func).
5. Let argList be ArgumentListEvaluation of Arguments.
[...]
12.3.6.1 Runtime Semantics: ArgumentListEvaluation
ArgumentList : ... AssignmentExpression
1. Let list be an empty List.
2. Let spreadRef be the result of evaluating AssignmentExpression.
3. Let spreadObj be GetValue(spreadRef).
4. Let iterator be GetIterator(spreadObj).
5. ReturnIfAbrupt(iterator).
6. Repeat
a. Let next be IteratorStep(iterator).
b. ReturnIfAbrupt(next).
c. If next is false, return list.
d. Let nextArg be IteratorValue(next).
e. ReturnIfAbrupt(nextArg).
f. Append nextArg as the last element of list.
---*/
var iter = {};
iter[Symbol.iterator] = function() {
var callCount = 0;
return {
next: function() {
callCount += 1;
return { done: callCount === 3, value: callCount };
}
};
};
var callCount = 0;
class Test262ParentClass {
constructor() {
assert.sameValue(arguments.length, 2);
assert.sameValue(arguments[0], 1);
assert.sameValue(arguments[1], 2);
callCount += 1;
}
}
class Test262ChildClass extends Test262ParentClass {
constructor() {
super(...iter);
}
}
new Test262ChildClass();
assert.sameValue(callCount, 1);

92
test/language/statements/class/dstr-gen-meth-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-decl-gen-meth.template
/*---
description: SingleNameBinding with normal value iteration (class expression method)
es6id: 14.5.16
flags: [generated]
info: >
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod : * PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
class C {
*method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
new C().method([1, 2, 3]).next();
assert.sameValue(callCount, 1);

92
test/language/statements/class/dstr-gen-meth-static-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-decl-gen-meth-static.template
/*---
description: SingleNameBinding with normal value iteration (static class expression generator method)
es6id: 14.5.15
flags: [generated]
info: >
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation for
m with arguments F and false.
[...]
14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
GeneratorMethod : * PropertyName ( StrictFormalParameters ) { GeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this GeneratorMethod is strict mode code,
let strict be true. Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be GeneratorFunctionCreate(Method,
StrictFormalParameters, GeneratorBody, scope, strict).
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
class C {
static *method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
C.method([1, 2, 3]).next();
assert.sameValue(callCount, 1);

90
test/language/statements/class/dstr-meth-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-decl-meth.template
/*---
description: SingleNameBinding with normal value iteration (class expression method)
es6id: 14.5.15
flags: [generated]
info: >
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
i. Let status be the result of performing
PropertyDefinitionEvaluation for m with arguments proto and
false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
class C {
method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
new C().method([1, 2, 3]);
assert.sameValue(callCount, 1);

90
test/language/statements/class/dstr-meth-static-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/cls-decl-meth-static.template
/*---
description: SingleNameBinding with normal value iteration (static class expression method)
es6id: 14.5.15
flags: [generated]
info: >
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation for
m with arguments F and false.
[...]
14.3.8 Runtime Semantics: DefineMethod
MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
[...]
6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
scope, strict). If functionPrototype was passed as a parameter then pass its
value as the functionPrototype optional argument of FunctionCreate.
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
class C {
static method([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
}
};
C.method([1, 2, 3]);
assert.sameValue(callCount, 1);

43
test/language/statements/const/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/const-stmt.template
/*---
description: SingleNameBinding with normal value iteration (`const` statement)
es6id: 13.3.1.4
flags: [generated]
info: >
LexicalBinding : BindingPattern Initializer
1. Let rhs be the result of evaluating Initializer.
2. Let value be GetValue(rhs).
3. ReturnIfAbrupt(value).
4. Let env be the running execution context's LexicalEnvironment.
5. Return the result of performing BindingInitialization for BindingPattern
using value and env as the arguments.
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
const [x, y, z] = [1, 2, 3];
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);

69
test/language/statements/function/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/func-decl.template
/*---
description: SingleNameBinding with normal value iteration (function declaration)
es6id: 14.1.19
flags: [generated]
info: >
FunctionDeclaration :
function BindingIdentifier ( FormalParameters ) { FunctionBody }
[...]
3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
function f([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
};
f([1, 2, 3]);
assert.sameValue(callCount, 1);

68
test/language/statements/generators/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/gen-func-decl.template
/*---
description: SingleNameBinding with normal value iteration (generator function declaration)
es6id: 14.4.12
flags: [generated]
info: >
GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
[...]
2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
GeneratorBody, scope, strict).
[...]
9.2.1 [[Call]] ( thisArgument, argumentsList)
[...]
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
[...]
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
[...]
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
[...]
23. Let iteratorRecord be Record {[[iterator]]:
CreateListIterator(argumentsList), [[done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
b. Let formalStatus be IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var callCount = 0;
function* f([x, y, z]) {
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);
callCount = callCount + 1;
};
f([1, 2, 3]).next();
assert.sameValue(callCount, 1);

43
test/language/statements/let/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/let-stmt.template
/*---
description: SingleNameBinding with normal value iteration (`let` statement)
es6id: 13.3.1.4
flags: [generated]
info: >
LexicalBinding : BindingPattern Initializer
1. Let rhs be the result of evaluating Initializer.
2. Let value be GetValue(rhs).
3. ReturnIfAbrupt(value).
4. Let env be the running execution context's LexicalEnvironment.
5. Return the result of performing BindingInitialization for BindingPattern
using value and env as the arguments.
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
let [x, y, z] = [1, 2, 3];
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);

42
test/language/statements/variable/dstr-ary-name-iter-val.js Normal file
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// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-name-iter-val.case
// - src/dstr-binding/default/var-stmt.template
/*---
description: SingleNameBinding with normal value iteration (`var` statement)
es6id: 13.3.2.4
flags: [generated]
info: >
VariableDeclaration : BindingPattern Initializer
1. Let rhs be the result of evaluating Initializer.
2. Let rval be GetValue(rhs).
3. ReturnIfAbrupt(rval).
4. Return the result of performing BindingInitialization for
BindingPattern passing rval and undefined as arguments.
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
SingleNameBinding : BindingIdentifier Initializeropt
[...]
4. If iteratorRecord.[[done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
c. ReturnIfAbrupt(next).
d. If next is false, set iteratorRecord.[[done]] to true.
e. Else,
[...]
i. Let v be IteratorValue(next).
ii. If v is an abrupt completion, set
iteratorRecord.[[done]] to true.
iii. ReturnIfAbrupt(v).
5. If iteratorRecord.[[done]] is true, let v be undefined.
[...]
8. Return InitializeReferencedBinding(lhs, v).
---*/
var [x, y, z] = [1, 2, 3];
assert.sameValue(x, 1);
assert.sameValue(y, 2);
assert.sameValue(z, 3);

88
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#!/usr/bin/env python
# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
from __future__ import print_function
import argparse
import os, sys
from lib.expander import Expander
from lib.test import Test
def print_error(*values):
print('ERROR:', *values, file=sys.stderr)
def find_cases(location):
# When a file is specified, return the file name and its containing
# directory
if os.path.isfile(location):
return location, [os.path.dirname(location)]
# When a directory is specified, if that directory contains a sub-directory
# names "default" interpret it as a "case directory"
if (os.path.isdir(os.path.join(location, 'default'))):
return None, [location]
else:
return None, map(
lambda x: os.path.join(args.cases, x), os.listdir(args.cases))
def clean(args):
for (subdir, _, fileNames) in os.walk(args.directory):
for fileName in map(lambda x: os.path.join(subdir, x), fileNames):
test = Test(fileName)
test.load()
if test.is_generated():
print('Deleting file "' + fileName + '"...')
os.remove(fileName)
def create(args):
caseFile, caseDirs = find_cases(args.cases)
for caseDir in caseDirs:
exp = Expander(caseDir)
for test in exp.expand('utf-8', caseFile):
if args.out:
try:
test.load(args.out)
if args.no_clobber:
print_error(
'Refusing to overwrite file: ' + test.file_name)
exit(1)
if not test.is_generated():
print_error(
'Refusing to overwrite non-generated file: ' +
test.file_name)
exit(1)
except IOError:
pass
test.write(args.out, parents=args.parents)
else:
print(test.to_string())
parser = argparse.ArgumentParser(description='Test262 test generator tool')
subparsers = parser.add_subparsers()
create_parser = subparsers.add_parser('create',
help='''Generate test material''')
create_parser.add_argument('-o', '--out', help='''The directory to write the
compiled tests. If unspecified, tests will be written to standard out.''')
create_parser.add_argument('-p', '--parents', action='store_true',
help='''Create non-existent directories as necessary.''')
create_parser.add_argument('-n', '--no-clobber', action='store_true',
help='''Do not produce test if a corresponding file exists within this
directory.''')
create_parser.add_argument('cases',
help='''Test cases to generate. May be a file or a directory.''')
create_parser.set_defaults(func=create)
clean_parser = subparsers.add_parser('clean',
help='''Remove previously-generated files''')
clean_parser.add_argument('directory',
help='''Remove any generated tests from this directory''')
clean_parser.set_defaults(func=clean)
args = parser.parse_args()
args.func(args)

1
tools/generation/lib/__init__.py Normal file
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pass

44
tools/generation/lib/case.py Normal file
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# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
import re
from util.find_comments import find_comments
from util.parse_yaml import parse_yaml
regionStartPattern = re.compile(r'-\s+(\S+)')
class Case:
def __init__(self, file_name):
self.attribs = dict(meta=None, regions=dict())
with open(file_name) as handle:
self.attribs = self._parse(handle.read())
def _parse(self, source):
case = dict(meta=None, regions=dict())
region_name = None
region_start = 0
lines = source.split('\n')
for comment in find_comments(source):
meta = parse_yaml(comment['source'])
if meta:
case['meta'] = meta
continue
match = regionStartPattern.match(comment['source'])
if match:
if region_name:
case['regions'][region_name] = \
'\n'.join(lines[region_start:comment['lineno'] - 1])
region_name = match.group(1)
region_start = comment['lineno']
continue
if region_name:
case['regions'][region_name] = \
'\n'.join(lines[region_start:-1])
return case

58
tools/generation/lib/expander.py Normal file
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# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
import re, os
from case import Case
from template import Template
caseFilenamePattern = re.compile(r'^[^\.].*\.case$')
templateFilenamePattern = re.compile(r'^[^\.].*\.template$')
class Expander:
def __init__(self, case_dir):
self.templates = dict()
self.case_dir = case_dir
def _load_templates(self, template_class):
directory = os.path.join(self.case_dir, template_class)
file_names = map(
lambda x: os.path.join(directory, x),
filter(self.is_template_file, os.listdir(directory))
)
self.templates[template_class] = [Template(x) for x in file_names]
def _get_templates(self, template_class):
if not template_class in self.templates:
self._load_templates(template_class)
return self.templates[template_class]
def is_template_file(self, filename):
return re.match(templateFilenamePattern, filename)
def list_cases(self):
for name in os.listdir(self.case_dir):
full = os.path.join(self.case_dir, name)
if os.path.isfile(full) and caseFilenamePattern.match(name):
yield full
def expand(self, encoding, case_file = None):
if case_file:
case_files = [case_file]
else:
case_files = self.list_cases()
for case_file in case_files:
for test in self.expand_case(case_file, encoding):
yield test
def expand_case(self, file_name, encoding):
case = Case(file_name)
template_class = case.attribs['meta']['template']
templates = self.templates.get(template_class)
for template in self._get_templates(template_class):
yield template.expand(file_name, os.path.basename(file_name[:-5]), case.attribs, encoding)

160
tools/generation/lib/template.py Normal file
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# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
import os, re
import codecs, yaml
from util.find_comments import find_comments
from util.parse_yaml import parse_yaml
from test import Test
indentPattern = re.compile(r'^(\s*)')
interpolatePattern = re.compile(r'\{\s*(\S+)\s*\}')
def indent(text, prefix = ' '):
'''Prefix a block of text (as defined by the "line break" control
character) with some character sequence.'''
if isinstance(text, list):
lines = text
else:
lines = text.split('\n')
return prefix + ('\n' + prefix).join(lines)
class Template:
def __init__(self, filename):
self.filename = filename
with open(filename) as template_file:
self.source = template_file.read()
self.attribs = dict()
self.regions = []
self._parse()
def _remove_comment(self, comment):
'''Create a region that is not intended to be referenced by any case,
ensuring that the comment is not emitted in the rendered file.'''
name = '__remove_comment_' + str(comment['firstchar']) + '__'
# When a removed comment ends the line, the following newline character
# should also be removed from the generated file.
lastchar = comment['lastchar']
if self.source[lastchar] == '\n':
comment['lastchar'] = comment['lastchar'] + 1
self.regions.insert(0, dict(name=name, **comment))
def _parse(self):
for comment in find_comments(self.source):
meta = parse_yaml(comment['source'])
# Do not emit the template's frontmatter in generated files
# (file-specific frontmatter is generated as part of the rendering
# process)
if meta:
self.attribs['meta'] = meta
self._remove_comment(comment)
continue
# Do not emit license information in generated files (recognized as
# comments preceeding the YAML frontmatter)
if not self.attribs.get('meta'):
self._remove_comment(comment)
continue
match = interpolatePattern.match(comment['source'])
if match == None:
continue
self.regions.insert(0, dict(name=match.group(1), **comment))
def expand_regions(self, source, context):
lines = source.split('\n')
for region in self.regions:
whitespace = indentPattern.match(lines[region['lineno']]).group(1)
value = context['regions'].get(region['name'], '')
source = source[:region['firstchar']] + \
indent(value, whitespace).lstrip() + \
source[region['lastchar']:]
setup = context['regions'].get('setup')
if setup:
source = setup + '\n' + source
teardown = context['regions'].get('teardown')
if teardown:
source += '\n' + teardown + '\n'
return source
def _frontmatter(self, case_filename, case_values):
description = case_values['meta']['desc'].strip() + \
' (' + self.attribs['meta']['name'].strip() + ')'
lines = []
lines += [
'// This file was procedurally generated from the following sources:',
'// - ' + case_filename,
'// - ' + self.filename,
'/*---',
'description: ' + description,
]
esid = self.attribs['meta'].get('esid')
if esid:
lines.append('esid: ' + esid)
es6id = self.attribs['meta'].get('es6id')
if es6id:
lines.append('es6id: ' + es6id)
features = []
features += case_values['meta'].get('features', [])
features += self.attribs['meta'].get('features', [])
if len(features):
lines += ['features: ' + yaml.dump(features)]
flags = ['generated']
flags += case_values['meta'].get('flags', [])
flags += self.attribs['meta'].get('flags', [])
lines += ['flags: ' + yaml.dump(flags).strip()]
includes = []
includes += case_values['meta'].get('includes', [])
includes += self.attribs['meta'].get('includes', [])
if len(includes):
lines += ['includes: ' + yaml.dump(includes).strip()]
if case_values['meta'].get('negative'):
lines += ['negative: ' + case_values['meta'].get('negative')]
info = []
if 'info' in self.attribs['meta']:
info.append(indent(self.attribs['meta']['info']))
if 'info' in case_values['meta']:
if len(info):
info.append('')
info.append(indent(case_values['meta']['info']))
if len(info):
lines.append('info: >')
lines += info
lines.append('---*/')
return '\n'.join(lines)
def expand(self, case_filename, case_name, case_values, encoding):
frontmatter = self._frontmatter(case_filename, case_values)
body = self.expand_regions(self.source, case_values)
return Test(self.attribs['meta']['path'] + case_name + '.js',
source=codecs.encode(frontmatter + '\n' + body, encoding))

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tools/generation/lib/test.py Normal file
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# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
import os, re
from util.find_comments import find_comments
from util.parse_yaml import parse_yaml
class Test:
"""Representation of a generated test. Specifies a file location which may
or may not exist."""
def __init__(self, file_name, source=None):
self.file_name = file_name
self.source = source
self.attribs = dict(meta=None)
if self.source:
self._parse()
def load(self, prefix = None):
location = os.path.join(prefix or '', self.file_name)
with open(location) as handle:
self.source = handle.read()
self._parse()
def _parse(self):
for comment in find_comments(self.source):
meta = parse_yaml(comment['source'])
if meta:
self.attribs['meta'] = meta
break
def is_generated(self):
if not self.attribs['meta']:
return False
flags = self.attribs['meta'].get('flags')
if not flags:
return False
return 'generated' in flags
def to_string(self):
return '\n'.join([
'/**',
' * ----------------------------------------------------------------',
' * ' + self.file_name,
' * ----------------------------------------------------------------',
' */',
self.source,
'\n'])
def write(self, prefix, parents=False):
location = os.path.join(prefix, self.file_name)
path = os.path.dirname(location)
if not os.path.exists(path):
if parents:
os.makedirs(path)
else:
raise Exception('Directory does not exist: ' + path)
with open(location, 'w') as handle:
handle.write(self.source)

1
tools/generation/lib/util/__init__.py Normal file
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pass

68
tools/generation/lib/util/find_comments.py Normal file
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# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
def find_comments(source):
'''Parse input string describing JavaScript source and yield dictionaries
describing the JavaScript comments in the order they appear in the source.
Each dictionary defines the following attributes:
- source: the source text of the comment
- firstchar: the zero-indexed position of the token that begins the comment
- lastchar: the zero-indexed position of the token that closes the comment
- lineno: the zero-indexed offset of the line on which the comment appears
'''
in_string = False
in_s_comment = False
in_m_comment = False
follows_escape = False
comment = ''
lineno = 0
for idx in xrange(len(source)):
if source[idx] == '\n':
lineno += 1
# Within comments and strings, any odd number of back-slashes begins an
# escape sequence.
if source[idx - 1] == '\\':
follows_escape = not follows_escape
else:
follows_escape = False
if in_s_comment:
if source[idx] == '\n':
in_s_comment = False
yield dict(
source=comment[1:],
firstchar=idx - len(comment) - 1,
lastchar=idx,
lineno=lineno)
continue
elif in_m_comment:
if source[idx - 1] == '*' and source[idx] == '/':
in_m_comment = False
yield dict(
source=comment[1:-1],
firstchar=idx - len(comment) - 1,
lastchar=idx + 1,
lineno=lineno)
continue
elif in_string:
if source[idx] == in_string and not follows_escape:
in_string = False
elif source[idx] == '\n' and in_string != '`' and not follows_escape:
in_string = False
continue
if in_m_comment or in_s_comment:
comment += source[idx]
continue
in_m_comment = source[idx] == '/' and source[idx + 1] == '*'
in_s_comment = source[idx] == '/' and source[idx + 1] == '/'
if in_m_comment or in_s_comment:
comment = ''
elif source[idx] == '\'' or source[idx] == '"' or source[idx] == '`':
in_string = source[idx]

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# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
import yaml, re
yamlPattern = re.compile(r'\---\n([\s]*)((?:\s|\S)*)[\n\s*]---',
flags=re.DOTALL|re.MULTILINE)
def parse_yaml(string):
match = yamlPattern.match(string)
if not match:
return False
unindented = re.sub('^' + match.group(1), '',
match.group(2), flags=re.MULTILINE)
return yaml.safe_load(unindented)

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tools/generation/requirements.txt Normal file
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PyYAML==3.11

19
tools/generation/test/expected/normal/nested/path2-normal.js Normal file
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// This file was procedurally generated from the following sources:
// - tools/generation/test/fixtures/normal.case
// - tools/generation/test/fixtures/normal/normal2.template
/*---
description: foobar (Second template name)
esid: sec-a-generic-id
flags: [generated, a, b]
includes: [foo.js, bar.js]
info: >
template info
case info
---*/
before-Third valueSecond value-after
/* Improperly-terminated comments should not break the tokenizer *
'This is "teardown" code.';

15
tools/generation/test/expected/normal/no-info-normal.js Normal file
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// This file was procedurally generated from the following sources:
// - tools/generation/test/fixtures/normal.case
// - tools/generation/test/fixtures/normal/no-info.template
/*---
description: foobar (First template name)
es6id: 1.2.3
flags: [generated, a, b]
includes: [foo.js]
info: >
case info
---*/
First value
'This is "teardown" code.';

33
tools/generation/test/expected/normal/path1-normal.js Normal file
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// This file was procedurally generated from the following sources:
// - tools/generation/test/fixtures/normal.case
// - tools/generation/test/fixtures/normal/normal.template
/*---
description: foobar (First template name)
es6id: 1.2.3
flags: [generated, a, b, c, d]
includes: [foo.js]
info: >
template info
case info
---*/
before-First value-between-Third value-after
before*Second value*between*First value*after
before/* " */Third valueafter
The following should not be expanded:
/* */*{ first }*/
/*
*/*{ first }*/
//*{ first }*/
// /*{ first }*/
"/*{ first }*/"
'/*{ first }*/'
`
/*{ first }*/`
'This is "teardown" code.';

27
tools/generation/test/fixtures/normal.case vendored Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
template: normal
desc: foobar
info: case info
flags: [a, b]
includes: [foo.js]
---*/
Because this test appears before any "region" delimiters, it should not appear
in the generated files.
// - first
this is not a valid region delimiter
/* *//- first
this is also not a valid region delimiter
//- first
First value
//- second
Second value
//- third
Third value
//- teardown
'This is "teardown" code.';

9
tools/generation/test/fixtures/normal/no-info.template vendored Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
name: First template name
path: normal/no-info-
es6id: 1.2.3
---*/
/*{ first }*/

27
tools/generation/test/fixtures/normal/normal.template vendored Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
name: First template name
path: normal/path1-
es6id: 1.2.3
info: template info
flags: [c, d]
---*/
before-/*{ first }*/-between-/*{ third }*/-after
before*/*{ second }*/*between*/*{ first }*/*after
before/* " *//*{ third }*/after
The following should not be expanded:
/* */*{ first }*/
/*
*/*{ first }*/
//*{ first }*/
// /*{ first }*/
"/*{ first }*/"
'/*{ first }*/'
`
/*{ first }*/`

13
tools/generation/test/fixtures/normal/normal2.template vendored Normal file
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
name: Second template name
path: normal/nested/path2-
esid: sec-a-generic-id
includes: [bar.js]
info: template info
---*/
before-/*{ third }*//*{ second }*/-after
/* Improperly-terminated comments should not break the tokenizer *

58
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#!/usr/bin/env python
# Copyright (C) 2016 the V8 project authors. All rights reserved.
# This code is governed by the BSD license found in the LICENSE file.
import shutil, subprocess, sys, os, unittest
testDir = os.path.dirname(os.path.relpath(__file__))
OUT_DIR = os.path.join(testDir, 'out')
EXPECTED_DIR = os.path.join(testDir, 'expected')
ex = os.path.join(testDir, '..', 'generator.py')
class TestGeneration(unittest.TestCase):
maxDiff = None
def fixture(self, name):
relpath = os.path.relpath(os.path.join(testDir, 'fixtures', name))
sp = subprocess.Popen(
[ex, 'create', '-o', OUT_DIR, '-p', relpath],
stdout=subprocess.PIPE)
stdout, stderr = sp.communicate()
return dict(stdout=stdout, stderr=stderr, returncode=sp.returncode)
def getFiles(self, path):
names = []
for root, _, fileNames in os.walk(path):
for fileName in filter(lambda x: x[0] != '.', fileNames):
names.append(os.path.join(root, fileName))
names.sort()
return names
def compareTrees(self, targetName):
expectedPath = os.path.join(EXPECTED_DIR, targetName)
actualPath = os.path.join(OUT_DIR, targetName)
expectedFiles = self.getFiles(expectedPath)
actualFiles = self.getFiles(actualPath)
self.assertListEqual(
map(lambda x: os.path.relpath(x, expectedPath), expectedFiles),
map(lambda x: os.path.relpath(x, actualPath), actualFiles))
for expectedFile, actualFile in zip(expectedFiles, actualFiles):
with open(expectedFile) as expectedHandle:
with open(actualFile) as actualHandle:
self.assertMultiLineEqual(
expectedHandle.read(),
actualHandle.read())
def tearDown(self):
shutil.rmtree(OUT_DIR, ignore_errors=True)
def test_normal(self):
result = self.fixture('normal.case')
self.assertEqual(result['returncode'], 0)
self.compareTrees('normal')
if __name__ == '__main__':
unittest.main()