diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision.js | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision.js b/js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision.js new file mode 100644 index 0000000000..a881416a91 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision.js @@ -0,0 +1,69 @@ +// |reftest| async +// This file was procedurally generated from the following sources: +// - src/dstr-binding-for-await/ary-ptrn-rest-id-elision.case +// - src/dstr-binding-for-await/default/for-await-of-async-gen-let.template +/*--- +description: Rest element following elision elements (for-await-of statement) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [destructuring-binding, async-iteration] +flags: [generated, async] +info: | + IterationStatement : + for await ( ForDeclaration of AssignmentExpression ) Statement + + [...] + 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, + lexicalBinding, labelSet, async). + + 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation + + [...] + 4. Let destructuring be IsDestructuring of lhs. + [...] + 6. Repeat + [...] + j. If destructuring is false, then + [...] + k. 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. + [...] + + 13.3.3.6 Runtime Semantics: IteratorBindingInitialization + ArrayBindingPattern : [ Elisionopt BindingRestElement ] + 1. If Elision is present, then + a. Let status be the result of performing + IteratorDestructuringAssignmentEvaluation of Elision with + iteratorRecord as the argument. + b. ReturnIfAbrupt(status). + 2. Return the result of performing IteratorBindingInitialization for + BindingRestElement with iteratorRecord and environment as arguments. +---*/ +var values = [1, 2, 3, 4, 5]; + +var iterCount = 0; + +async function *fn() { + for await (let [ , , ...x] of [values]) { + assert(Array.isArray(x)); + assert.sameValue(x.length, 3); + assert.sameValue(x[0], 3); + assert.sameValue(x[1], 4); + assert.sameValue(x[2], 5); + assert.notSameValue(x, values); + + iterCount += 1; + } +} + +fn().next() + .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) + .then($DONE, $DONE); + |