tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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array-elem-iter-thrw-close.js (1799B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-assignment/array-elem-iter-thrw-close.case
      3 // - src/dstr-assignment/error/assignment-expr.template
      4 /*---
      5 description: IteratorClose is called when reference evaluation produces a "throw" completion (AssignmentExpression)
      6 esid: sec-variable-statement-runtime-semantics-evaluation
      7 features: [Symbol.iterator, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    VariableDeclaration : BindingPattern Initializer
     11 
     12    1. Let rhs be the result of evaluating Initializer.
     13    2. Let rval be GetValue(rhs).
     14    3. ReturnIfAbrupt(rval).
     15    4. Return the result of performing BindingInitialization for
     16       BindingPattern passing rval and undefined as arguments.
     17 
     18    ArrayAssignmentPattern : [ AssignmentElementList ]
     19 
     20    [...]
     21    5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
     22       result).
     23    6. Return result.
     24 
     25    7.4.6 IteratorClose( iterator, completion )
     26 
     27    [...]
     28    6. Let innerResult be Call(return, iterator, « »).
     29    [...]
     30 
     31 ---*/
     32 var nextCount = 0;
     33 var returnCount = 0;
     34 var thisValue = null;
     35 var args = null;
     36 var iterable = {};
     37 var iterator = {
     38  next: function() {
     39    nextCount += 1;
     40    return { done: true };
     41  },
     42  return: function() {
     43    returnCount += 1;
     44    thisValue = this;
     45    args = arguments;
     46  }
     47 };
     48 var thrower = function() {
     49  throw new Test262Error();
     50 };
     51 iterable[Symbol.iterator] = function() {
     52  return iterator;
     53 };
     54 
     55 assert.throws(Test262Error, function() {
     56  0, [ {}[thrower()] ] = iterable;
     57 });
     58 
     59 assert.sameValue(nextCount, 0);
     60 assert.sameValue(returnCount, 1);
     61 assert.sameValue(thisValue, iterator, 'correct `this` value');
     62 assert(!!args, 'arguments object provided');
     63 assert.sameValue(args.length, 0, 'zero arguments specified');
     64 
     65 reportCompare(0, 0);