mirror of https://github.com/tc39/test262.git
47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-elem-ary-rest-init.case
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// - src/dstr-binding/default/async-gen-func-decl-dflt.template
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/*---
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description: BindingElement with array binding pattern and initializer is used (async generator function declaration (default parameter))
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esid: sec-asyncgenerator-definitions-instantiatefunctionobject
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features: [async-iteration]
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flags: [generated, async]
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info: |
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AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
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( FormalParameters ) { AsyncGeneratorBody }
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[...]
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3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
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scope, strict).
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[...]
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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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BindingElement : BindingPatternInitializer opt
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[...]
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2. If iteratorRecord.[[done]] is true, let v be undefined.
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3. If Initializer is present and v is undefined, then
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a. Let defaultValue be the result of evaluating Initializer.
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b. Let v be ? GetValue(defaultValue).
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4. Return the result of performing BindingInitialization of BindingPattern
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with v and environment as the arguments.
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---*/
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var values = [2, 1, 3];
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var callCount = 0;
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async function* f([[...x] = values] = []) {
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assert(Array.isArray(x));
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assert.sameValue(x[0], 2);
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assert.sameValue(x[1], 1);
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assert.sameValue(x[2], 3);
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assert.sameValue(x.length, 3);
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assert.notSameValue(x, values);
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callCount = callCount + 1;
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};
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f().next().then(() => {
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assert.sameValue(callCount, 1, 'invoked exactly once');
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}).then($DONE, $DONE);
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