diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-empty-iter-close.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-empty-iter-close.js | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-empty-iter-close.js b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-empty-iter-close.js new file mode 100644 index 0000000000..4afab5f0d4 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-empty-iter-close.js @@ -0,0 +1,81 @@ +// |reftest| async +// This file was procedurally generated from the following sources: +// - src/dstr-assignment-for-await/array-empty-iter-close.case +// - src/dstr-assignment-for-await/async-generator/async-gen-decl.template +/*--- +description: Iterator is closed without iterating (for-await-of statement in an async generator declaration) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [Symbol.iterator, destructuring-binding, async-iteration] +flags: [generated, async] +info: | + IterationStatement : + for await ( LeftHandSideExpression of AssignmentExpression ) Statement + + 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », + AssignmentExpression, iterate). + 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, + keyResult, assignment, labelSet). + + 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation + + [...] + 5. If destructuring is true and if lhsKind is assignment, then + a. Assert: lhs is a LeftHandSideExpression. + b. Let assignmentPattern be the parse of the source text corresponding to + lhs using AssignmentPattern as the goal symbol. + [...] + + ArrayAssignmentPattern : [ ] + + 1. Let iterator be GetIterator(value). + 2. ReturnIfAbrupt(iterator). + 3. Return IteratorClose(iterator, NormalCompletion(empty)). + + 7.4.6 IteratorClose ( iterator, completion ) + + [...] + 5. Let innerResult be Call(return, iterator, « »). + [...] + +---*/ +let nextCount = 0; +let returnCount = 0; +let thisValue = null; +let args = null; +let iterator = { + next() { + nextCount += 1; + return { done: true }; + }, + return() { + returnCount += 1; + thisValue = this; + args = arguments; + return {}; + } +}; +let iterable = { + [Symbol.iterator]() { + return iterator; + } +}; + +let iterCount = 0; +async function * fn() { + for await ([] of [iterable]) { + assert.sameValue(nextCount, 0); + assert.sameValue(returnCount, 1); + assert.sameValue(thisValue, iterator, 'correct `this` value'); + assert(!!args, 'arguments object provided'); + assert.sameValue(args.length, 0, 'zero arguments specified'); + + + iterCount += 1; + } +} + +let iter = fn(); + +iter.next() + .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) + .then($DONE, $DONE); |