mirror of https://github.com/tc39/test262.git
59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
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// Copyright 2015 Mike Pennisi. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es6id: 8.1.1.2.1
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description: >
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False-coercing `Symbol.unscopables` properties do not block access to object environment record
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info: >
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[...]
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6. If the withEnvironment flag of envRec is false, return true.
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7. Let unscopables be Get(bindings, @@unscopables).
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8. ReturnIfAbrupt(unscopables).
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9. If Type(unscopables) is Object, then
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a. Let blocked be ToBoolean(Get(unscopables, N)).
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b. ReturnIfAbrupt(blocked).
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c. If blocked is true, return false.
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10. Return true.
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ES6: 13.11.7 (The `with` Statement) Runtime Semantics: Evaluation
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[...]
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6. Set the withEnvironment flag of newEnv’s EnvironmentRecord to true.
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[...]
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flags: [noStrict]
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features: [Symbol.unscopables]
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---*/
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var x = 0;
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var env = { x: 1 };
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env[Symbol.unscopables] = {};
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with (env) {
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assert.sameValue(x, 1, 'undefined (no property defined)');
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}
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env[Symbol.unscopables].x = false;
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with (env) {
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assert.sameValue(x, 1, 'literal `false` value');
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}
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env[Symbol.unscopables].x = undefined;
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with (env) {
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assert.sameValue(x, 1, 'literal `undefined` value');
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}
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env[Symbol.unscopables].x = null;
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with (env) {
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assert.sameValue(x, 1, 'null value');
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}
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env[Symbol.unscopables].x = 0;
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with (env) {
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assert.sameValue(x, 1, 'literal `0` number value');
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}
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env[Symbol.unscopables].x = '';
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with (env) {
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assert.sameValue(x, 1, 'empty string value');
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}
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