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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/language/statements/for/dstr/const-ary-init-iter-close.js | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for/dstr/const-ary-init-iter-close.js b/js/src/tests/test262/language/statements/for/dstr/const-ary-init-iter-close.js new file mode 100644 index 0000000000..82b8dcccb5 --- /dev/null +++ b/js/src/tests/test262/language/statements/for/dstr/const-ary-init-iter-close.js @@ -0,0 +1,72 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-init-iter-close.case +// - src/dstr-binding/default/for-const.template +/*--- +description: Iterator is closed when not exhausted by pattern evaluation (for statement) +esid: sec-for-statement-runtime-semantics-labelledevaluation +features: [Symbol.iterator, destructuring-binding] +flags: [generated] +info: | + IterationStatement : + for ( LexicalDeclaration Expressionopt ; Expressionopt ) Statement + + [...] + 7. Let forDcl be the result of evaluating LexicalDeclaration. + [...] + + LexicalDeclaration : LetOrConst BindingList ; + + 1. Let next be the result of evaluating BindingList. + 2. ReturnIfAbrupt(next). + 3. Return NormalCompletion(empty). + + BindingList : BindingList , LexicalBinding + + 1. Let next be the result of evaluating BindingList. + 2. ReturnIfAbrupt(next). + 3. Return the result of evaluating LexicalBinding. + + 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. + + 13.3.3.5 Runtime Semantics: BindingInitialization + + BindingPattern : ArrayBindingPattern + + [...] + 4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator, + result). + [...] + +---*/ +var doneCallCount = 0; +var iter = {}; +iter[Symbol.iterator] = function() { + return { + next: function() { + return { value: null, done: false }; + }, + return: function() { + doneCallCount += 1; + return {}; + } + }; +}; + +var iterCount = 0; + +for (const [x] = iter; iterCount < 1; ) { + assert.sameValue(doneCallCount, 1); + + iterCount += 1; +} + +assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); + +reportCompare(0, 0); |