tor-browser

The Tor Browser
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cls-decl-async-gen-func-args-trailing-comma-spread-operator.js (1578B)


      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/arguments/args-trailing-comma-spread-operator.case
      4 // - src/arguments/default/async-gen-func-decl.template
      5 /*---
      6 description: A trailing comma should not increase the arguments.length, using spread args (async generator function declaration)
      7 esid: sec-asyncgenerator-definitions-instantiatefunctionobject
      8 features: [async-iteration]
      9 flags: [generated, async]
     10 info: |
     11    AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
     12        ( FormalParameters ) { AsyncGeneratorBody }
     13 
     14        [...]
     15        3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
     16            scope, strict).
     17        [...]
     18 
     19 
     20    Trailing comma in the arguments list
     21 
     22    Left-Hand-Side Expressions
     23 
     24    Arguments :
     25        ( )
     26        ( ArgumentList )
     27        ( ArgumentList , )
     28 
     29    ArgumentList :
     30        AssignmentExpression
     31        ... AssignmentExpression
     32        ArgumentList , AssignmentExpression
     33        ArgumentList , ... AssignmentExpression
     34 ---*/
     35 var arr = [2, 3];
     36 
     37 
     38 
     39 var callCount = 0;
     40 // Stores a reference `ref` for case evaluation
     41 async function* ref() {
     42  assert.sameValue(arguments.length, 4);
     43  assert.sameValue(arguments[0], 42);
     44  assert.sameValue(arguments[1], 1);
     45  assert.sameValue(arguments[2], 2);
     46  assert.sameValue(arguments[3], 3);
     47  callCount = callCount + 1;
     48 }
     49 
     50 ref(42, ...[1], ...arr,).next().then(() => {
     51    assert.sameValue(callCount, 1, 'generator function invoked exactly once');
     52 }).then($DONE, $DONE);