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Add logical assignment tests

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Alexey Shvayka 2020-08-10 12:24:34 +03:00 committed by Rick Waldron
parent ec6f77c4d1
commit 61188b8abc
3 changed files with 70 additions and 0 deletions
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25
test/annexB/language/expressions/logical-assignment/emulates-undefined-and.js Normal file
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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-assignment-operators-runtime-semantics-evaluation
description: >
ToBoolean returns `false` for [[IsHTMLDDA]] object; rval is not evaluated.
info: |
AssignmentExpression : LeftHandSideExpression &&= AssignmentExpression
1. Let lref be the result of evaluating LeftHandSideExpression.
2. Let lval be ? GetValue(lref).
3. Let lbool be ! ToBoolean(lval).
4. If lbool is false, return lval.
The [[IsHTMLDDA]] Internal Slot / Changes to ToBoolean
1. If argument has an [[IsHTMLDDA]] internal slot, return false.
2. Return true.
features: [IsHTMLDDA, logical-assignment-operators]
---*/
var IsHTMLDDA = $262.IsHTMLDDA;
var value = IsHTMLDDA;
assert.sameValue(value &&= unresolved, IsHTMLDDA);
assert.sameValue(value, IsHTMLDDA);

19
test/annexB/language/expressions/logical-assignment/emulates-undefined-coalesce.js Normal file
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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-assignment-operators-runtime-semantics-evaluation
description: >
??= doesn't special-case [[IsHTMLDDA]] object; rval is not evaluated.
info: |
AssignmentExpression : LeftHandSideExpression ??= AssignmentExpression
1. Let lref be the result of evaluating LeftHandSideExpression.
2. Let lval be ? GetValue(lref).
3. If lval is neither undefined nor null, return lval.
features: [IsHTMLDDA, logical-assignment-operators]
---*/
var IsHTMLDDA = $262.IsHTMLDDA;
var value = IsHTMLDDA;
assert.sameValue(value ??= unresolved, IsHTMLDDA);
assert.sameValue(value, IsHTMLDDA);

26
test/annexB/language/expressions/logical-assignment/emulates-undefined-or.js Normal file
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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-assignment-operators-runtime-semantics-evaluation
description: >
ToBoolean returns `false` for [[IsHTMLDDA]] object; rval is evaluated.
info: |
AssignmentExpression : LeftHandSideExpression ||= AssignmentExpression
1. Let lref be the result of evaluating LeftHandSideExpression.
2. Let lval be ? GetValue(lref).
3. Let lbool be ! ToBoolean(lval).
[...]
7. Perform ? PutValue(lref, rval).
8. Return rval.
The [[IsHTMLDDA]] Internal Slot / Changes to ToBoolean
1. If argument has an [[IsHTMLDDA]] internal slot, return false.
2. Return true.
features: [IsHTMLDDA, logical-assignment-operators]
---*/
var value = $262.IsHTMLDDA;
assert.sameValue(value ||= 2, 2);
assert.sameValue(value, 2);