Add generators templates for async gen

src/async-generators/default/async-class-decl-method.template

@@ -0,0 +1,34 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/statements/class/async-gen-method-
+name: Async Generator method as a ClassDeclaration element
+esid: prod-AsyncGeneratorMethod
+info: |
+  ClassElement :
+    MethodDefinition
+
+  MethodDefinition :
+    AsyncGeneratorMethod
+
+  Async Generator Function Definitions
+
+  AsyncGeneratorMethod :
+    async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+class C { async *gen() {
+    callCount += 1;
+    /*{ body }*/
+}}
+
+var gen = C.prototype.gen;
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/default/async-class-decl-static-method.template

@@ -0,0 +1,34 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/statements/class/async-gen-method-static-
+name: Static async generator method as a ClassDeclaration element
+esid: prod-AsyncGeneratorMethod
+info: |
+  ClassElement :
+    static MethodDefinition
+
+  MethodDefinition :
+    AsyncGeneratorMethod
+
+  Async Generator Function Definitions
+
+  AsyncGeneratorMethod :
+    async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+class C { static async *gen() {
+    callCount += 1;
+    /*{ body }*/
+}}
+
+var gen = C.gen;
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/default/async-class-expr-method.template

@@ -0,0 +1,34 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/expressions/class/async-gen-method-
+name: Async generator method as a ClassExpression element
+esid: prod-AsyncGeneratorMethod
+info: |
+  ClassElement :
+    MethodDefinition
+
+  MethodDefinition :
+    AsyncGeneratorMethod
+
+  Async Generator Function Definitions
+
+  AsyncGeneratorMethod :
+    async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var C = class { async *gen() {
+    callCount += 1;
+    /*{ body }*/
+}}
+
+var gen = C.prototype.gen;
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/default/async-class-expr-static-method.template

@@ -0,0 +1,34 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/expressions/class/async-gen-method-static-
+name: Static async generator method as a ClassExpression element
+esid: prod-AsyncGeneratorMethod
+info: |
+  ClassElement :
+    static MethodDefinition
+
+  MethodDefinition :
+    AsyncGeneratorMethod
+
+  Async Generator Function Definitions
+
+  AsyncGeneratorMethod :
+    async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var C = class { static async *gen() {
+    callCount += 1;
+    /*{ body }*/
+}}
+
+var gen = C.gen;
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/default/async-declaration.template

@@ -0,0 +1,27 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/statements/async-generator/
+name: Async generator Function declaration
+esid: prod-AsyncGeneratorDeclaration
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorDeclaration:
+    async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
+      AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+async function *gen() {
+  callCount += 1;
+  /*{ body }*/
+}
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/default/async-expression-named.template

@@ -0,0 +1,27 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/expressions/async-generator/named-
+name: Named async generator expression
+esid: prod-AsyncGeneratorExpression
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorExpression :
+    async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
+      AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var gen = async function *g() {
+  callCount += 1;
+  /*{ body }*/
+};
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/default/async-expression.template

@@ -0,0 +1,27 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/expressions/async-generator/
+name: Unnamed async generator expression
+esid: prod-AsyncGeneratorExpression
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorExpression :
+    async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
+      AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var gen = async function *() {
+  callCount += 1;
+  /*{ body }*/
+};
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/default/async-obj-method.template

@@ -0,0 +1,27 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+path: language/expressions/object/method-definition/async-gen-
+name: Async generator method
+esid: prod-AsyncGeneratorMethod
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorMethod :
+    async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var gen = {
+  async *method() {
+    callCount += 1;
+    /*{ body }*/
+  }
+}.method;
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/non-strict/async-declaration.template

@@ -0,0 +1,27 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/statements/async-generator/
+name: Async generator function declaration - valid for non-strict only cases
+esid: prod-AsyncGeneratorDeclaration
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorDeclaration:
+    async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
+      AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+async function *gen() {
+  callCount += 1;
+  /*{ body }*/
+}
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/non-strict/async-expression-named.template

@@ -0,0 +1,27 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/expressions/async-generator/named-
+name: Async generator named expression - valid for non-strict only cases
+esid: prod-AsyncGeneratorExpression
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorExpression :
+    async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
+      AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var gen = async function *g() {
+  callCount += 1;
+  /*{ body }*/
+};
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/non-strict/async-expression.template

@@ -0,0 +1,27 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/expressions/async-generator/
+name: Async generator expression - valid for non-strict only cases
+esid: prod-AsyncGeneratorExpression
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorExpression :
+    async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
+      AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var gen = async function *() {
+  callCount += 1;
+  /*{ body }*/
+};
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/non-strict/async-obj-method.template

@@ -0,0 +1,28 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+path: language/expressions/object/method-definition/async-gen-
+name: Generator method - valid for non-strict only cases
+esid: prod-AsyncGeneratorMethod
+info: |
+  Async Generator Function Definitions
+
+  AsyncGeneratorMethod :
+    async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+---*/
+
+var callCount = 0;
+
+var gen = {
+  async *method() {
+    callCount += 1;
+    /*{ body }*/
+  }
+}.method;
+
+var iter = gen();
+
+/*{ assertions }*/
+
+assert.sameValue(callCount, 1);

src/async-generators/yield-identifier-non-strict.case

@@ -0,0 +1,30 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: >
+  Use of yield as a valid identifier in a function body inside a generator body
+  in non strict mode
+template: non-strict
+flags: [noStrict, async]
+---*/
+
+//- body
+  return (function(arg) {
+    var yield = arg + 1;
+    return yield;
+  }(yield))
+//- assertions
+var item = iter.next();
+
+item.then(({ done, value }) => {
+  assert.sameValue(done, false);
+  assert.sameValue(value, undefined);
+});
+
+item = iter.next(42);
+
+item.then(({ done, value }) => {
+  assert.sameValue(done, true);
+  assert.sameValue(value, 43);
+}).then($DONE, $DONE);

src/async-generators/yield-identifier-spread-non-strict.case

@@ -0,0 +1,45 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: >
+  Mixed use of object spread and yield as a valid identifier in a function body
+  inside a generator body in non strict mode
+template: non-strict
+info: |
+  Spread Properties
+
+  PropertyDefinition[Yield]:
+    (...)
+    ...AssignmentExpression[In, ?Yield]
+features: [object-spread]
+flags: [noStrict, async]
+---*/
+
+//- body
+  yield {
+     ...yield yield,
+     ...(function(arg) {
+        var yield = arg;
+        return {...yield};
+     }(yield)),
+     ...yield,
+  }
+//- assertions
+var iter = gen();
+
+iter.next();
+iter.next();
+iter.next({ x: 10, a: 0, b: 0 });
+iter.next({ y: 20, a: 1, b: 1 });
+var item = iter.next({ z: 30, b: 2 });
+
+item.then(({ done, value }) => {
+  assert.sameValue(done, false);
+  assert.sameValue(value.x, 10);
+  assert.sameValue(value.y, 20);
+  assert.sameValue(value.z, 30);
+  assert.sameValue(value.a, 1);
+  assert.sameValue(value.b, 2);
+  assert.sameValue(Object.keys(value).length, 5);
+}).then($DONE, $DONE);

src/async-generators/yield-identifier-spread-strict.case

@@ -0,0 +1,28 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: >
+  It's an early error if the AssignmentExpression is a function body with yield
+  as an identifier in strict mode.
+template: default
+info: |
+  Spread Properties
+
+  PropertyDefinition[Yield]:
+    (...)
+    ...AssignmentExpression[In, ?Yield]
+features: [object-spread]
+flags: [onlyStrict]
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+//- body
+  return {
+     ...(function() {
+        var yield;
+        throw new Test262Error();
+     }()),
+  }

src/async-generators/yield-identifier-strict.case

@@ -0,0 +1,19 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: >
+  It's an early error if the generator body has another function body with
+  yield as an identifier in strict mode.
+template: default
+flags: [onlyStrict]
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+//- body
+  (function() {
+    var yield;
+    throw new Test262Error();
+  }())

src/async-generators/yield-spread-arr-multiple.case

@@ -0,0 +1,33 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: Use yield value in a array spread position
+template: default
+info: |
+  Array Initializer
+
+  SpreadElement[Yield, Await]:
+    ...AssignmentExpression[+In, ?Yield, ?Await]
+includes:
+  - compareArray.js
+flags: [async]
+---*/
+
+//- setup
+var arr = ['a', 'b', 'c'];
+var item;
+//- body
+  yield [...yield yield];
+//- assertions
+iter.next(false);
+item = iter.next(['a', 'b', 'c']);
+
+item.then(({ done, value }) => {
+  item = iter.next(value);
+
+  item.then(({ done, value }) => {
+    assert(compareArray(value, arr));
+    assert.sameValue(done, false);
+  }).then($DONE, $DONE);
+}).catch($DONE);

src/async-generators/yield-spread-arr-single.case

@@ -0,0 +1,28 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: Use yield value in a array spread position
+template: default
+info: |
+  Array Initializer
+
+  SpreadElement[Yield, Await]:
+    ...AssignmentExpression[+In, ?Yield, ?Await]
+includes:
+  - compareArray.js
+flags: [async]
+---*/
+
+//- setup
+var arr = ['a', 'b', 'c'];
+//- body
+  yield [...yield];
+//- assertions
+iter.next(false);
+var item = iter.next(['a', 'b', 'c']);
+
+item.then(({ done, value }) => {
+  assert(compareArray(value, arr));
+  assert.sameValue(done, false);
+}).then($DONE, $DONE);

src/async-generators/yield-spread-obj.case

@@ -0,0 +1,36 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: Use yield value in a object spread position
+template: default
+info: |
+  Spread Properties
+
+  PropertyDefinition[Yield]:
+    (...)
+    ...AssignmentExpression[In, ?Yield]
+features: [object-spread]
+includes:
+  - compareArray.js
+flags: [async]
+---*/
+
+//- body
+  yield {
+    ...yield,
+    y: 1,
+    ...yield yield,
+  };
+//- assertions
+iter.next();
+iter.next({ x: 42 });
+iter.next({ x: 'lol' });
+var item = iter.next({ y: 39 });
+
+item.then(({ done, value }) => {
+  assert.sameValue(value.x, 42);
+  assert.sameValue(value.y, 39);
+  assert.sameValue(Object.keys(value).length, 2);
+  assert.sameValue(done, false);
+}).then($DONE, $DONE);