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89 lines
2.4 KiB
89 lines
2.4 KiB
// Copyright Joyent, Inc. and other Node contributors.
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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/*
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* Tests to verify slice functionality of ArrayBuffer.
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* (http://www.khronos.org/registry/typedarray/specs/latest/#5)
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*/
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var common = require('../common');
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var assert = require('assert');
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var buffer = new ArrayBuffer(8);
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var sub;
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var i;
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for (var i = 0; i < 8; i++) {
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buffer[i] = i;
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}
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// slice a copy of buffer
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sub = buffer.slice(2, 6);
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// make sure it copied correctly
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assert.ok(sub instanceof ArrayBuffer);
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assert.equal(sub.byteLength, 4);
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for (i = 0; i < 4; i++) {
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assert.equal(sub[i], i+2);
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}
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// modifications to the new slice shouldn't affect the original
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sub[0] = 999;
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for (i = 0; i < 8; i++) {
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assert.equal(buffer[i], i);
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}
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// test optional end param
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sub = buffer.slice(5);
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assert.ok(sub instanceof ArrayBuffer);
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assert.equal(sub.byteLength, 3);
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for (i = 0; i < 3; i++) {
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assert.equal(sub[i], i+5);
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}
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// test clamping
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sub = buffer.slice(-3, -1);
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assert.ok(sub instanceof ArrayBuffer);
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assert.equal(sub.byteLength, 2);
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for (i = 0; i < 2; i++) {
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assert.equal(sub[i], i+5);
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}
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// test invalid clamping range
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sub = buffer.slice(-1, -3);
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assert.ok(sub instanceof ArrayBuffer);
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assert.equal(sub.byteLength, 0);
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// test wrong number of arguments
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var gotError = false;
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try {
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sub = buffer.slice();
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} catch (e) {
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gotError = true;
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}
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assert.ok(gotError);
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