mirror of https://github.com/tc39/test262.git
53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
// Copyright 2015 Mike Pennisi. All rights reserved.
|
||
// This code is governed by the BSD license found in the LICENSE file.
|
||
|
||
/*---
|
||
es6id: 8.1.1.2.1
|
||
description: >
|
||
True-coercing `Symbol.unscopables` properties block access to object environment record
|
||
info: >
|
||
[...]
|
||
6. If the withEnvironment flag of envRec is false, return true.
|
||
7. Let unscopables be Get(bindings, @@unscopables).
|
||
8. ReturnIfAbrupt(unscopables).
|
||
9. If Type(unscopables) is Object, then
|
||
a. Let blocked be ToBoolean(Get(unscopables, N)).
|
||
b. ReturnIfAbrupt(blocked).
|
||
c. If blocked is true, return false.
|
||
|
||
ES6: 13.11.7 (The `with` Statement) Runtime Semantics: Evaluation
|
||
[...]
|
||
6. Set the withEnvironment flag of newEnv’s EnvironmentRecord to true.
|
||
[...]
|
||
flags: [noStrict]
|
||
features: [Symbol.unscopables]
|
||
---*/
|
||
|
||
var x = 0;
|
||
var env = { x: 1 };
|
||
env[Symbol.unscopables] = { x: true };
|
||
|
||
with (env) {
|
||
assert.sameValue(x, 0, 'literal `true` value');
|
||
}
|
||
|
||
env[Symbol.unscopables].x = 'string';
|
||
with (env) {
|
||
assert.sameValue(x, 0, 'non-empty string values');
|
||
}
|
||
|
||
env[Symbol.unscopables].x = 86;
|
||
with (env) {
|
||
assert.sameValue(x, 0, 'non-zero number values');
|
||
}
|
||
|
||
env[Symbol.unscopables].x = {};
|
||
with (env) {
|
||
assert.sameValue(x, 0, 'object values');
|
||
}
|
||
|
||
env[Symbol.unscopables].x = Symbol.unscopables;
|
||
with (env) {
|
||
assert.sameValue(x, 0, 'Symbol values');
|
||
}
|