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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-dataview-buffer-byteoffset-bytelength
description: >
Throws a TypeError if buffer is detached
info: |
24.2.2.1 DataView (buffer, byteOffset, byteLength )
...
4. Let numberOffset be ? ToNumber(byteOffset).
...
7. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.
...
includes: [detachArrayBuffer.js]
---*/
var toNumberOffset = 0;
var obj = {
valueOf: function() {
toNumberOffset += 1;
return 0;
}
};
var ab = new ArrayBuffer(42);
$DETACHBUFFER(ab);
assert.throws(TypeError, function() {
new DataView(ab, obj);
}, "throws if buffer is detached");
assert.sameValue(toNumberOffset, 1, "ToNumber(byteOffset) runs before");
reportCompare(0, 0);