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