src/dstr-binding/ary-ptrn-elem-obj-prop-id-init.case

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: BindingElement with object binding pattern and initializer is used
template: default
info: |
    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    BindingElement : BindingPatternInitializer opt

    [...]
    2. If iteratorRecord.[[done]] is true, let v be undefined.
    3. If Initializer is present and v is undefined, then
       a. Let defaultValue be the result of evaluating Initializer.
       b. Let v be ? GetValue(defaultValue).
    4. Return the result of performing BindingInitialization of BindingPattern
       with v and environment as the arguments.
---*/

//- elems
[{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }]
//- vals
[]
//- body
assert.sameValue(v, 444);
assert.sameValue(x, 555);
assert.sameValue(z, 666);

assert.throws(ReferenceError, function() {
  u;
});
assert.throws(ReferenceError, function() {
  w;
});
assert.throws(ReferenceError, function() {
  y;
});