diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for-of/dstr/let-ary-init-iter-no-close.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-of/dstr/let-ary-init-iter-no-close.js | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/dstr/let-ary-init-iter-no-close.js b/js/src/tests/test262/language/statements/for-of/dstr/let-ary-init-iter-no-close.js new file mode 100644 index 0000000000..63205c97cf --- /dev/null +++ b/js/src/tests/test262/language/statements/for-of/dstr/let-ary-init-iter-no-close.js @@ -0,0 +1,72 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-init-iter-no-close.case +// - src/dstr-binding/default/for-of-let.template +/*--- +description: Iterator is not closed when exhausted by pattern evaluation (for-of statement) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [Symbol.iterator, destructuring-binding] +flags: [generated] +info: | + IterationStatement : + for ( ForDeclaration of AssignmentExpression ) Statement + + [...] + 3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, + lexicalBinding, labelSet). + + 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation + + [...] + 3. Let destructuring be IsDestructuring of lhs. + [...] + 5. Repeat + [...] + h. If destructuring is false, then + [...] + i. Else + i. If lhsKind is assignment, then + [...] + ii. Else if lhsKind is varBinding, then + [...] + iii. Else, + 1. Assert: lhsKind is lexicalBinding. + 2. Assert: lhs is a ForDeclaration. + 3. Let status be the result of performing BindingInitialization + for lhs passing nextValue and iterationEnv 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: true }; + }, + return: function() { + doneCallCount += 1; + return {}; + } + }; +}; + +var iterCount = 0; + +for (let [x] of [iter]) { + assert.sameValue(doneCallCount, 0); + + iterCount += 1; +} + +assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); + +reportCompare(0, 0); |