diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-rest-empty-obj.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-rest-empty-obj.js | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-rest-empty-obj.js b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-rest-empty-obj.js new file mode 100644 index 0000000000..af7cfaad45 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-rest-empty-obj.js @@ -0,0 +1,46 @@ +// |reftest| async +// This file was procedurally generated from the following sources: +// - src/dstr-assignment-for-await/obj-rest-empty-obj.case +// - src/dstr-assignment-for-await/default/async-gen-decl.template +/*--- +description: RestBindingInitialization creates a new object even if lhs is an empty object (for-await-of statement in an async generator declaration) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [object-rest, 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. + [...] +---*/ +let rest; + + +let iterCount = 0; +async function * fn() { + for await ({...rest} of [{}]) { + assert.notSameValue(rest, undefined); + assert.notSameValue(rest, null); + assert.sameValue(typeof rest, "object"); + + iterCount += 1; + } +} + +let promise = fn().next(); + +promise + .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) + .then($DONE, $DONE); |