diff options
Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/language/statements/async-generator/dstr/ary-ptrn-elision.js | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/async-generator/dstr/ary-ptrn-elision.js b/js/src/tests/test262/language/statements/async-generator/dstr/ary-ptrn-elision.js new file mode 100644 index 0000000000..2571145e47 --- /dev/null +++ b/js/src/tests/test262/language/statements/async-generator/dstr/ary-ptrn-elision.js @@ -0,0 +1,57 @@ +// |reftest| async +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-ptrn-elision.case +// - src/dstr-binding/default/async-gen-func-decl.template +/*--- +description: Elision advances iterator (async generator function declaration) +esid: sec-asyncgenerator-definitions-instantiatefunctionobject +features: [generators, async-iteration] +flags: [generated, async] +info: | + AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier + ( FormalParameters ) { AsyncGeneratorBody } + + [...] + 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, + scope, strict). + [...] + + + 13.3.3.6 Runtime Semantics: IteratorBindingInitialization + + ArrayBindingPattern : [ Elision ] + + 1. Return the result of performing + IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord + as the argument. + + 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation + + Elision : , + + 1. If iteratorRecord.[[done]] is false, then + a. Let next be IteratorStep(iteratorRecord.[[iterator]]). + b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. + c. ReturnIfAbrupt(next). + d. If next is false, set iteratorRecord.[[done]] to true. + 2. Return NormalCompletion(empty). + +---*/ +var first = 0; +var second = 0; +function* g() { + first += 1; + yield; + second += 1; +}; + + +var callCount = 0; +async function* f([,]) { + assert.sameValue(first, 1); + assert.sameValue(second, 0); + callCount = callCount + 1; +}; +f(g()).next().then(() => { + assert.sameValue(callCount, 1, 'invoked exactly once'); +}).then($DONE, $DONE); |