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58 lines
2.2 KiB
JavaScript
58 lines
2.2 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// Copyright (C) 2017 Mozilla Corporation. 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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Return new instance from defined byteoffset and undefined bytelength
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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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8. If byteLength is either not present or undefined, then
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a. Let viewByteLength be bufferByteLength - offset.
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...
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17. Return O.
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features: [SharedArrayBuffer]
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---*/
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var sample;
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var buffer = new SharedArrayBuffer(4);
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sample = new DataView(buffer, 0, undefined);
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assert.sameValue(sample.byteLength, 4, "sample.byteLength");
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assert.sameValue(sample.byteOffset, 0, "sample.byteOffset");
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assert.sameValue(sample.buffer, buffer);
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assert.sameValue(sample.constructor, DataView);
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assert.sameValue(Object.getPrototypeOf(sample), DataView.prototype);
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sample = new DataView(buffer, 1, undefined);
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assert.sameValue(sample.byteLength, 3, "sample.byteLength");
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assert.sameValue(sample.byteOffset, 1, "sample.byteOffset");
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assert.sameValue(sample.buffer, buffer);
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assert.sameValue(sample.constructor, DataView);
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assert.sameValue(Object.getPrototypeOf(sample), DataView.prototype);
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sample = new DataView(buffer, 2, undefined);
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assert.sameValue(sample.byteLength, 2, "sample.byteLength");
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assert.sameValue(sample.byteOffset, 2, "sample.byteOffset");
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assert.sameValue(sample.buffer, buffer);
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assert.sameValue(sample.constructor, DataView);
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assert.sameValue(Object.getPrototypeOf(sample), DataView.prototype);
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sample = new DataView(buffer, 3, undefined);
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assert.sameValue(sample.byteLength, 1, "sample.byteLength");
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assert.sameValue(sample.byteOffset, 3, "sample.byteOffset");
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assert.sameValue(sample.buffer, buffer);
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assert.sameValue(sample.constructor, DataView);
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assert.sameValue(Object.getPrototypeOf(sample), DataView.prototype);
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sample = new DataView(buffer, 4, undefined);
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assert.sameValue(sample.byteLength, 0, "sample.byteLength");
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assert.sameValue(sample.byteOffset, 4, "sample.byteOffset");
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assert.sameValue(sample.buffer, buffer);
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assert.sameValue(sample.constructor, DataView);
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assert.sameValue(Object.getPrototypeOf(sample), DataView.prototype);
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