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Add ObjectBindingPattern destructuring tests

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Alexey Shvayka 2020-04-15 03:25:15 +03:00 committed by Rick Waldron
parent 4d9944e014
commit 1c067242a4
2 changed files with 70 additions and 0 deletions
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35
test/annexB/language/expressions/assignment/dstr/object-pattern-emulates-undefined.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-destructuring-binding-patterns-runtime-semantics-bindinginitialization
description: >
Destructuring initializer is not evaluated when value is an object
with [[IsHTMLDDA]] internal slot.
info: |
BindingPattern : ObjectBindingPattern
1. Perform ? RequireObjectCoercible(value).
2. Return the result of performing BindingInitialization for
ObjectBindingPattern using value and environment as arguments.
Runtime Semantics: KeyedBindingInitialization
SingleNameBinding : BindingIdentifier Initializer[opt]
[...]
4. If Initializer is present and v is undefined, then
[...]
5. If environment is undefined, return ? PutValue(lhs, v).
features: [destructuring-binding, IsHTMLDDA]
---*/
var initCount = 0;
var counter = function() {
initCount += 1;
};
var x, IsHTMLDDA = $262.IsHTMLDDA;
({x = counter()} = {x: IsHTMLDDA});
assert.sameValue(x, IsHTMLDDA);
assert.sameValue(initCount, 0);

35
test/annexB/language/statements/const/dstr/object-pattern-emulates-undefined.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-destructuring-binding-patterns-runtime-semantics-bindinginitialization
description: >
Destructuring initializer is not evaluated when value is an object
with [[IsHTMLDDA]] internal slot.
info: |
BindingPattern : ObjectBindingPattern
1. Perform ? RequireObjectCoercible(value).
2. Return the result of performing BindingInitialization for
ObjectBindingPattern using value and environment as arguments.
Runtime Semantics: KeyedBindingInitialization
SingleNameBinding : BindingIdentifier Initializer[opt]
[...]
4. If Initializer is present and v is undefined, then
[...]
5. If environment is undefined, return ? PutValue(lhs, v).
features: [destructuring-binding, IsHTMLDDA]
---*/
let initCount = 0;
const counter = function() {
initCount += 1;
};
const IsHTMLDDA = $262.IsHTMLDDA;
const {x = counter()} = {x: IsHTMLDDA};
assert.sameValue(x, IsHTMLDDA);
assert.sameValue(initCount, 0);