tor-browser

The Tor Browser
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async-private-gen-meth-obj-ptrn-prop-id-init-skipped.js (2808B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-binding/obj-ptrn-prop-id-init-skipped.case
      4 // - src/dstr-binding/default/cls-expr-async-private-gen-meth.template
      5 /*---
      6 description: Destructuring initializer is not evaluated when value is not `undefined` (private class expression method)
      7 esid: sec-class-definitions-runtime-semantics-evaluation
      8 features: [class, class-methods-private, async-iteration]
      9 flags: [generated, async]
     10 info: |
     11    ClassExpression : class BindingIdentifieropt ClassTail
     12 
     13    1. If BindingIdentifieropt is not present, let className be undefined.
     14    2. Else, let className be StringValue of BindingIdentifier.
     15    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
     16       with argument className.
     17    [...]
     18 
     19    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     20 
     21    21. For each ClassElement m in order from methods
     22        a. If IsStatic of m is false, then
     23           i. Let status be the result of performing
     24              PropertyDefinitionEvaluation for m with arguments proto and
     25              false.
     26        [...]
     27 
     28    Runtime Semantics: PropertyDefinitionEvaluation
     29 
     30    AsyncGeneratorMethod :
     31        async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
     32            { AsyncGeneratorBody }
     33 
     34    1. Let propKey be the result of evaluating PropertyName.
     35    2. ReturnIfAbrupt(propKey).
     36    3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
     37       Otherwise let strict be false.
     38    4. Let scope be the running execution context's LexicalEnvironment.
     39    5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
     40       AsyncGeneratorBody, scope, strict).
     41    [...]
     42 
     43 
     44    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
     45 
     46    BindingElement : BindingPattern Initializeropt
     47 
     48    [...]
     49    3. If Initializer is present and v is undefined, then
     50    [...]
     51 ---*/
     52 var initCount = 0;
     53 function counter() {
     54  initCount += 1;
     55 }
     56 
     57 
     58 var callCount = 0;
     59 var C = class {
     60  async * #method({ s: t = counter(), u: v = counter(), w: x = counter(), y: z = counter() }) {
     61    assert.sameValue(t, null);
     62    assert.sameValue(v, 0);
     63    assert.sameValue(x, false);
     64    assert.sameValue(z, '');
     65    assert.sameValue(initCount, 0);
     66 
     67    assert.throws(ReferenceError, function() {
     68      s;
     69    });
     70    assert.throws(ReferenceError, function() {
     71      u;
     72    });
     73    assert.throws(ReferenceError, function() {
     74      w;
     75    });
     76    assert.throws(ReferenceError, function() {
     77      y;
     78    });
     79    callCount = callCount + 1;
     80  }
     81 
     82  get method() {
     83    return this.#method;
     84  }
     85 };
     86 
     87 new C().method({ s: null, u: 0, w: false, y: '' }).next().then(() => {
     88    assert.sameValue(callCount, 1, 'invoked exactly once');    
     89 }).then($DONE, $DONE);