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Diffstat (limited to 'js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-rest-lref.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-rest-lref.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-rest-lref.js b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-rest-lref.js new file mode 100644 index 0000000000..1f7b06d136 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-rest-lref.js @@ -0,0 +1,81 @@ +// |reftest| async +// This file was procedurally generated from the following sources: +// - src/dstr-assignment-for-await/array-rest-lref.case +// - src/dstr-assignment-for-await/async-generator/async-gen-decl.template +/*--- +description: Reference is evaluated during assignment (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 : [ Elisionopt AssignmentRestElement ] + + [...] + 4. Let result be the result of performing + IteratorDestructuringAssignmentEvaluation of AssignmentRestElement + with iteratorRecord as the argument. + 5. If iteratorRecord.[[Done]] is false, return ? IteratorClose(iterator, result). + + + AssignmentRestElement[Yield] : ... DestructuringAssignmentTarget + + 1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an + ArrayLiteral, then + a. Let lref be the result of evaluating DestructuringAssignmentTarget. + b. ReturnIfAbrupt(lref). + [...] + +---*/ +let nextCount = 0; +let returnCount = 0; +let iterator = { + next() { + nextCount += 1; + return { done: true }; + }, + return() { + returnCount += 1; + } +}; +let obj = {}; +let iterable = { + [Symbol.iterator]() { + return iterator; + } +}; + +let iterCount = 0; +async function * fn() { + for await ([...obj['a' + 'b']] of [iterable]) { + assert.sameValue(nextCount, 1); + assert.sameValue(returnCount, 0); + assert(!!obj.ab); + assert.sameValue(obj.ab.length, 0); + + iterCount += 1; + } +} + +let iter = fn(); + +iter.next() + .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) + .then($DONE, $DONE); + |