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3b3bd06819
Add tests that assert the management of the running execution context's LexicalEnvironment and VariableEnvironment components, as created by the following abstract operations: - NewDeclarativeEnvironment - NewObjectEnvironment - NewFunctionEnvironment Many tests require the use of non-strict direct eval, meaning they may not be run in strict mode. This does not effect coverage because the semantics in these cases are not observable from strict mode code. Some situations require the creation of a binding, but this binding has no relevance to the test itself. In these cases, use names consisting solely of the underscore character (`_`). Avoid the use of Block statements wherever possible, as these trigger the creation of additional environments which may interfere with the behavior under test.
37 lines
1.4 KiB
JavaScript
37 lines
1.4 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. 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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esid: sec-function-definitions-runtime-semantics-iteratorbindinginitialization
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description: >
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Creation of new variable environment for the BindingRestElement formal
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parameter
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info: |
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[...]
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2. Let currentContext be the running execution context.
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3. Let originalEnv be the VariableEnvironment of currentContext.
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4. Assert: The VariableEnvironment and LexicalEnvironment of currentContext
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are the same.
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5. Assert: environment and originalEnv are the same.
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6. Let paramVarEnv be NewDeclarativeEnvironment(originalEnv).
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7. Set the VariableEnvironment of currentContext to paramVarEnv.
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8. Set the LexicalEnvironment of currentContext to paramVarEnv.
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9. Let result be the result of performing IteratorBindingInitialization for
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BindingRestElement using iteratorRecord and environment as the arguments.
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10. Set the VariableEnvironment of currentContext to originalEnv.
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11. Set the LexicalEnvironment of currentContext to originalEnv.
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[...]
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flags: [noStrict]
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---*/
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var x = 'outside';
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var probe1, probe2;
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(function(
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_ = probe1 = function() { return x; },
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...[__ = (eval('var x = "inside";'), probe2 = function() { return x; })]
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) {
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}());
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assert.sameValue(probe1(), 'outside');
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assert.sameValue(probe2(), 'inside');
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