mirror of https://github.com/tc39/test262.git
92 lines
2.3 KiB
JavaScript
92 lines
2.3 KiB
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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esid: sec-dataview-buffer-byteoffset-bytelength
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description: >
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ToIndex conversions on byteOffset
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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 offset be ? ToIndex(byteOffset).
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...
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ToIndex( value )
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1. If value is undefined, then
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a. Let index be 0.
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2. Else,
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a. Let integerIndex be ? ToInteger(value).
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b. If integerIndex < 0, throw a RangeError exception.
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c. Let index be ! ToLength(integerIndex).
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d. If SameValueZero(integerIndex, index) is false, throw a RangeError exception.
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3. Return index.
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---*/
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var obj1 = {
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valueOf: function() {
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return 3;
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}
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};
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var obj2 = {
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toString: function() {
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return 4;
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}
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};
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var sample;
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var ab = new ArrayBuffer(42);
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sample = new DataView(ab, -0);
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assert.sameValue(sample.byteOffset, 0, "-0");
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sample = new DataView(ab, obj1);
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assert.sameValue(sample.byteOffset, 3, "object's valueOf");
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sample = new DataView(ab, obj2);
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assert.sameValue(sample.byteOffset, 4, "object's toString");
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sample = new DataView(ab, "");
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assert.sameValue(sample.byteOffset, 0, "the Empty string");
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sample = new DataView(ab, "0");
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assert.sameValue(sample.byteOffset, 0, "string '0'");
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sample = new DataView(ab, "1");
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assert.sameValue(sample.byteOffset, 1, "string '1'");
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sample = new DataView(ab, true);
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assert.sameValue(sample.byteOffset, 1, "true");
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sample = new DataView(ab, false);
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assert.sameValue(sample.byteOffset, 0, "false");
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sample = new DataView(ab, NaN);
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assert.sameValue(sample.byteOffset, 0, "NaN");
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sample = new DataView(ab, null);
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assert.sameValue(sample.byteOffset, 0, "null");
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sample = new DataView(ab, undefined);
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assert.sameValue(sample.byteOffset, 0, "undefined");
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sample = new DataView(ab, 0.1);
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assert.sameValue(sample.byteOffset, 0, "0.1");
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sample = new DataView(ab, 0.9);
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assert.sameValue(sample.byteOffset, 0, "0.9");
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sample = new DataView(ab, 1.1);
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assert.sameValue(sample.byteOffset, 1, "1.1");
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sample = new DataView(ab, 1.9);
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assert.sameValue(sample.byteOffset, 1, "1.9");
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sample = new DataView(ab, -0.1);
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assert.sameValue(sample.byteOffset, 0, "-0.1");
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sample = new DataView(ab, -0.99999);
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assert.sameValue(sample.byteOffset, 0, "-0.99999");
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