mirror of
https://github.com/tc39/test262.git
synced 2025-05-29 03:00:31 +02:00
9b4ca4371b
These tests support the following normative change "Normative: Allow null or undefined in Reference Records" https://github.com/tc39/ecma262/pull/2267 The tests concerning the `delete` operator increase coverage to verify behavior which, though related, is not altered by the normative change. These tests are intended to guard against regressions as engines implement the new semantics.
32 lines
895 B
JavaScript
32 lines
895 B
JavaScript
// Copyright (C) 2021 the V8 project authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
|
|
/*---
|
|
esid: sec-assignment-operators
|
|
description: Assignment Operator evaluates the value prior validating a MemberExpression's reference (undefined)
|
|
info: |
|
|
# 13.15.2 Runtime Semantics: Evaluation
|
|
AssignmentExpression : LeftHandSideExpression = AssignmentExpression
|
|
|
|
1. If LeftHandSideExpression is neither an ObjectLiteral nor an ArrayLiteral,
|
|
then
|
|
a. Let lref be the result of evaluating LeftHandSideExpression.
|
|
[...]
|
|
e. Perform ? PutValue(lref, rval).
|
|
|
|
# 6.2.4.5 PutValue ( V, W )
|
|
|
|
[...]
|
|
5. If IsPropertyReference(V) is true, then
|
|
a. Let baseObj be ? ToObject(V.[[Base]]).
|
|
---*/
|
|
|
|
var count = 0;
|
|
var base = undefined;
|
|
|
|
assert.throws(TypeError, function() {
|
|
base.prop = count += 1;
|
|
});
|
|
|
|
assert.sameValue(count, 1);
|