test262/test/language/expressions/assignment/dstr-array-rest-nested-array-iter-thrw-close-skip.js

// This file was procedurally generated from the following sources:
// - src/dstr-assignment/array-rest-nested-array-iter-thrw-close-skip.case
// - src/dstr-assignment/error/assignment-expr.template
/*---
description: IteratorClose is not called when nested array pattern evaluation produces an abrupt completion (AssignmentExpression)
esid: sec-variable-statement-runtime-semantics-evaluation
es6id: 13.3.2.4
features: [Symbol.iterator, destructuring-binding]
flags: [generated]
info: |
    VariableDeclaration : BindingPattern Initializer

    1. Let rhs be the result of evaluating Initializer.
    2. Let rval be GetValue(rhs).
    3. ReturnIfAbrupt(rval).
    4. Return the result of performing BindingInitialization for
       BindingPattern passing rval and undefined as arguments.

    ArrayAssignmentPattern : [ Elisionopt AssignmentRestElement ]

    [...]
    5. Let result be the result of performing
       IteratorDestructuringAssignmentEvaluation of AssignmentRestElement with
       iteratorRecord as the argument
    6. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
       result).

    AssignmentRestElement[Yield] : ... DestructuringAssignmentTarget

    [...]
    4. Repeat while iteratorRecord.[[done]] is false
       [...]
       d. If next is false, set iteratorRecord.[[done]] to true.
       [...]
    7. Return the result of performing DestructuringAssignmentEvaluation of
       nestedAssignmentPattern with A as the argument.

---*/
var nextCount = 0;
var returnCount = 0;
var iterable = {};
var iterator = {
  next: function() {
    nextCount += 1;
    return { done: true };
  },
  return: function() {
    returnCount += 1;
  }
};
var thrower = function() {
  throw new Test262Error();
};
iterable[Symbol.iterator] = function() {
  return iterator;
};

assert.throws(Test262Error, function() {
  0, [...[...{}[thrower()]]] = iterable;
});

assert.sameValue(nextCount, 1);
assert.sameValue(returnCount, 0);