JSTests/test262/test/language/expressions/assignment/dstr/array-rest-elision-iter-abpt.js

// This file was procedurally generated from the following sources:
// - src/dstr-assignment/array-rest-elision-iter-abpt.case
// - src/dstr-assignment/error/assignment-expr.template
/*---
description: IteratorClose is not called when assignment 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 ]

    [...]
    4. If Elision is present, then
       a. Let status be the result of performing
          IteratorDestructuringAssignmentEvaluation of Elision with
          iteratorRecord as the argument.
       b. If status is an abrupt completion, then
          i. If iteratorRecord.[[done]] is false, return
             IteratorClose(iterator, status).
          ii. Return Completion(status).

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

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

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