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These tests support the following normative change "Normative: Allow null or undefined in Reference Records" https://github.com/tc39/ecma262/pull/2267 The tests concerning the `delete` operator increase coverage to verify behavior which, though related, is not altered by the normative change. These tests are intended to guard against regressions as engines implement the new semantics.
22 lines
632 B
JavaScript
22 lines
632 B
JavaScript
// Copyright (C) 2021 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-delete-operator
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description: Delete Operator throws an error if the base reference is not object-coercible (null).
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info: |
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# 12.5.3.2 Runtime Semantics: Evaluation
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UnaryExpression : delete UnaryExpression
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[...]
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5. If IsPropertyReference(ref) is true, then
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a. If IsSuperReference(ref) is true, throw a ReferenceError exception.
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b. Let baseObj be ? ToObject(ref.[[Base]]).
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---*/
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var base = null;
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assert.throws(TypeError, function() {
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delete base.prop;
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});
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