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33 lines
1023 B
Plaintext
33 lines
1023 B
Plaintext
// 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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desc: Variable binding is initialized to `undefined` in outer scope
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template: eval-func
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info: |
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B.3.3.3 Changes to EvalDeclarationInstantiation
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[...]
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a. If declaredFunctionOrVarNames does not contain F, then
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i. If varEnvRec is a global Environment Record, then
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[...]
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ii. Else,
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i. Let bindingExists be varEnvRec.HasBinding(F).
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ii. If bindingExists is false, then
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i. Perform ! varEnvRec.CreateMutableBinding(F, true).
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ii. Perform ! varEnvRec.InitializeBinding(F, undefined).
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[...]
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---*/
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//- setup
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var init, changed;
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//- before
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init = f;
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f = 123;
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changed = f;
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//- teardown
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assert.sameValue(init, undefined, 'binding is initialized to `undefined`');
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assert.sameValue(changed, 123, 'binding is mutable');
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assert.throws(ReferenceError, function() {
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f;
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}, 'global binding is not created');
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