diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for/dstr/var-ary-init-iter-close.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for/dstr/var-ary-init-iter-close.js | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for/dstr/var-ary-init-iter-close.js b/js/src/tests/test262/language/statements/for/dstr/var-ary-init-iter-close.js new file mode 100644 index 0000000000..129718d89c --- /dev/null +++ b/js/src/tests/test262/language/statements/for/dstr/var-ary-init-iter-close.js @@ -0,0 +1,65 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-init-iter-close.case +// - src/dstr-binding/default/for-var.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 ( var VariableDeclarationList ; Expressionopt ; Expressionopt ) Statement + + 1. Let varDcl be the result of evaluating VariableDeclarationList. + [...] + + 13.3.2.4 Runtime Semantics: Evaluation + + VariableDeclarationList : VariableDeclarationList , VariableDeclaration + + 1. Let next be the result of evaluating VariableDeclarationList. + 2. ReturnIfAbrupt(next). + 3. Return the result of evaluating VariableDeclaration. + + VariableDeclaration : BindingPattern Initializer + + 1. Let rhs be the result of evaluating Initializer. + 2. Let rval be GetValue(rhs). + 3. ReturnIfAbrupt(rval). + 4. Return the result of performing BindingInitialization for BindingPattern + passing rval and undefined as 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 (var [x] = iter; iterCount < 1; ) { + assert.sameValue(doneCallCount, 1); + iterCount += 1; +} + +assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); + +reportCompare(0, 0); |