| // 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"); |
