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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.
42 lines
1.4 KiB
JavaScript
42 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-prepareforordinarycall
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description: >
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Creation of new variable environment for the function parameters and body
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(as disinct from that for the function's BindingIdentifier)
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info: |
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[...]
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3. Let callerContext be the running execution context.
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4. Let calleeContext be PrepareForOrdinaryCall(F, undefined).
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[...]
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9.2.1.1 PrepareForOrdinaryCall
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[...]
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8. Let localEnv be NewFunctionEnvironment(F, newTarget).
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9. Set the LexicalEnvironment of calleeContext to localEnv.
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10. Set the VariableEnvironment of calleeContext to localEnv.
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[...]
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---*/
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var name = 'outside';
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var probeBefore = function() { return name; };
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var probeBody;
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// This test intentionally elides parameter expressions because their presence
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// triggers the creation of an additional LexicalEnvironment dedicated to the
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// function body (see sec-functiondeclarationinstantiation)
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var func = function name() {
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// The initializer is intentionally omitted from the following
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// VariableStatement in order to demonstrate that a new binding is created
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// (and not simply re-used from the FunctionExpression's BindingIdentifier).
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var name;
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probeBody = function() { return name; };
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};
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func();
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assert.sameValue(probeBefore(), 'outside');
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assert.sameValue(probeBody(), undefined);
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