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Add coverage for Yield parameter in RHS of in

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Mike Pennisi 2021-03-05 17:11:56 -05:00 committed by Rick Waldron
parent e990dce904
commit aca79695ba
3 changed files with 83 additions and 0 deletions
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30
test/language/expressions/in/rhs-yield-absent-non-strict.js Normal file
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// Copyright 2021 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Parsing observes the `Yield` production parameter when absent (without strict mode)
info: |
Syntax
RelationalExpression[In, Yield, Await]:
[...]
[+In] RelationalExpression[+In, ?Yield, ?Await] in ShiftExpression[?Yield, ?Await]
[...]
1. Let lref be the result of evaluating RelationalExpression.
2. Let lval be ? GetValue(lref).
3. Let rref be the result of evaluating ShiftExpression.
4. Let rval be ? GetValue(rref).
5. If Type(rval) is not Object, throw a TypeError exception.
6. Return ? HasProperty(rval, ? ToPropertyKey(lval)).
esid: sec-relational-operators
flags: [noStrict]
---*/
var yield;
yield = {'': 0};
assert.sameValue('' in (yield), true);
yield = {};
assert.sameValue('' in (yield), false);

20
test/language/expressions/in/rhs-yield-absent-strict.js Normal file
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// Copyright 2021 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Parsing observes the `Yield` production parameter when absent (within strict mode)
info: |
Syntax
RelationalExpression[In, Yield, Await]:
[...]
[+In] RelationalExpression[+In, ?Yield, ?Await] in ShiftExpression[?Yield, ?Await]
esid: sec-relational-operators
negative:
phase: parse
type: SyntaxError
flags: [onlyStrict]
---*/
$DONOTEVALUATE();
'' in (yield);

33
test/language/expressions/in/rhs-yield-present.js Normal file
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// Copyright 2021 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Parsing observes the `Yield` production parameter when present
info: |
Syntax
RelationalExpression[In, Yield, Await]:
[...]
[+In] RelationalExpression[+In, ?Yield, ?Await] in ShiftExpression[?Yield, ?Await]
[...]
1. Let lref be the result of evaluating RelationalExpression.
2. Let lval be ? GetValue(lref).
3. Let rref be the result of evaluating ShiftExpression.
4. Let rval be ? GetValue(rref).
5. If Type(rval) is not Object, throw a TypeError exception.
6. Return ? HasProperty(rval, ? ToPropertyKey(lval)).
esid: sec-relational-operators-runtime-semantics-evaluation
---*/
function * isNameIn() {
return '' in (yield);
}
let iter1 = isNameIn();
iter1.next();
assert.sameValue(iter1.next({'': 0}).value, true);
let iter2 = isNameIn();
iter2.next();
assert.sameValue(iter2.next({}).value, false);