mirror of
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92 lines
3.3 KiB
JavaScript
92 lines
3.3 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/function-forms/dflt-params-arg-val-not-undefined.case
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// - src/function-forms/default/cls-expr-async-gen-meth-static.template
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/*---
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description: Use of intializer when argument value is not `undefined` (static class expression async generator method)
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esid: sec-class-definitions-runtime-semantics-evaluation
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features: [default-parameters, async-iteration]
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flags: [generated, async]
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info: |
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ClassExpression : class BindingIdentifieropt ClassTail
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1. If BindingIdentifieropt is not present, let className be undefined.
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2. Else, let className be StringValue of BindingIdentifier.
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3. Let value be the result of ClassDefinitionEvaluation of ClassTail
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with argument className.
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[...]
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14.5.14 Runtime Semantics: ClassDefinitionEvaluation
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21. For each ClassElement m in order from methods
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a. If IsStatic of m is false, then
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b. Else,
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Let status be the result of performing PropertyDefinitionEvaluation
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for m with arguments F and false.
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[...]
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Runtime Semantics: PropertyDefinitionEvaluation
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AsyncGeneratorMethod :
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async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
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{ AsyncGeneratorBody }
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1. Let propKey be the result of evaluating PropertyName.
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2. ReturnIfAbrupt(propKey).
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3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
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Otherwise let strict be false.
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4. Let scope be the running execution context's LexicalEnvironment.
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5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
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AsyncGeneratorBody, scope, strict).
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[...]
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14.1.19 Runtime Semantics: IteratorBindingInitialization
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FormalsList : FormalsList , FormalParameter
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[...]
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23. Let iteratorRecord be Record {[[Iterator]]:
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CreateListIterator(argumentsList), [[Done]]: false}.
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24. If hasDuplicates is true, then
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[...]
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25. Else,
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a. Perform ? IteratorBindingInitialization for formals with
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iteratorRecord and env as arguments.
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[...]
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---*/
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var obj = {};
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var falseCount = 0;
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var stringCount = 0;
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var nanCount = 0;
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var zeroCount = 0;
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var nullCount = 0;
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var objCount = 0;
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var callCount = 0;
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var C = class {
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static async *method(aFalse = falseCount +=1, aString = stringCount += 1, aNaN = nanCount += 1, a0 = zeroCount += 1, aNull = nullCount += 1, aObj = objCount +=1) {
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assert.sameValue(aFalse, false);
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assert.sameValue(aString, '');
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assert.sameValue(aNaN, NaN);
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assert.sameValue(a0, 0);
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assert.sameValue(aNull, null);
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assert.sameValue(aObj, obj);
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callCount = callCount + 1;
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}
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}
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// Stores a reference `ref` for case evaluation
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var ref = C.method;
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ref(false, '', NaN, 0, null, obj).next().then(() => {
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assert.sameValue(callCount, 1, 'method invoked exactly once');
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}).then($DONE, $DONE);
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assert.sameValue(falseCount, 0, 'initializer not evaluated: false');
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assert.sameValue(stringCount, 0, 'initializer not evaluated: string');
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assert.sameValue(nanCount, 0, 'initializer not evaluated: NaN');
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assert.sameValue(zeroCount, 0, 'initializer not evaluated: 0');
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assert.sameValue(nullCount, 0, 'initializer not evaluated: null');
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assert.sameValue(objCount, 0, 'initializer not evaluated: object');
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