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Diffstat (limited to 'js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-id-init-yield-expr.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-id-init-yield-expr.js | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-id-init-yield-expr.js b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-id-init-yield-expr.js new file mode 100644 index 0000000000..f831a39cb7 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-obj-id-init-yield-expr.js @@ -0,0 +1,51 @@ +// |reftest| async +// This file was procedurally generated from the following sources: +// - src/dstr-assignment-for-await/obj-id-init-yield-expr.case +// - src/dstr-assignment-for-await/async-generator/async-gen-decl.template +/*--- +description: When a `yield` token appears within the Initializer of an AssignmentProperty and within a generator function body, it should behave as a YieldExpression. (for-await-of statement in an async generator declaration) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [generators, 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 x; + + +let iterCount = 0; +async function * fn() { + for await ({ x = yield } of [{}]) { + + iterCount += 1; + } +} + +let iter = fn(); + +iter.next().then(result => { + assert.sameValue(result.value, undefined); + assert.sameValue(result.done, false); + assert.sameValue(x, undefined); + + iter.next(3).then(result => { + assert.sameValue(result.value, undefined); + assert.sameValue(result.done, true); + assert.sameValue(x, 3); + }).then($DONE, $DONE); +}); |