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36 lines
838 B
JavaScript
36 lines
838 B
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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es6id: 24.2.2.1
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esid: sec-dataview-buffer-byteoffset-bytelength
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description: >
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Throws a TypeError if buffer is detached
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info: |
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24.2.2.1 DataView (buffer, byteOffset, byteLength )
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...
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4. Let numberOffset be ? ToNumber(byteOffset).
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...
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7. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.
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...
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includes: [detachArrayBuffer.js]
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---*/
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var toNumberOffset = 0;
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var obj = {
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valueOf: function() {
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toNumberOffset += 1;
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return 0;
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}
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};
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var ab = new ArrayBuffer(42);
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$DETACHBUFFER(ab);
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assert.throws(TypeError, function() {
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new DataView(ab, obj);
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}, "throws if buffer is detached");
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assert.sameValue(toNumberOffset, 1, "ToNumber(byteOffset) runs before");
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