deno.land / std@0.166.0 / node / _tools / test / parallel / test-buffer-slice.js
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
// Copyright Joyent, Inc. and other Node contributors.//// 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://// The above copyright notice and this permission notice shall be included// in all copies or substantial portions of the Software.//// 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.
'use strict';
require('../common');const assert = require('assert');
assert.strictEqual(Buffer.from('hello', 'utf8').slice(0, 0).length, 0);assert.strictEqual(Buffer('hello', 'utf8').slice(0, 0).length, 0);
const buf = Buffer.from('0123456789', 'utf8');const expectedSameBufs = [ [buf.slice(-10, 10), Buffer.from('0123456789', 'utf8')], [buf.slice(-20, 10), Buffer.from('0123456789', 'utf8')], [buf.slice(-20, -10), Buffer.from('', 'utf8')], [buf.slice(), Buffer.from('0123456789', 'utf8')], [buf.slice(0), Buffer.from('0123456789', 'utf8')], [buf.slice(0, 0), Buffer.from('', 'utf8')], [buf.slice(undefined), Buffer.from('0123456789', 'utf8')], [buf.slice('foobar'), Buffer.from('0123456789', 'utf8')], [buf.slice(undefined, undefined), Buffer.from('0123456789', 'utf8')], [buf.slice(2), Buffer.from('23456789', 'utf8')], [buf.slice(5), Buffer.from('56789', 'utf8')], [buf.slice(10), Buffer.from('', 'utf8')], [buf.slice(5, 8), Buffer.from('567', 'utf8')], [buf.slice(8, -1), Buffer.from('8', 'utf8')], [buf.slice(-10), Buffer.from('0123456789', 'utf8')], [buf.slice(0, -9), Buffer.from('0', 'utf8')], [buf.slice(0, -10), Buffer.from('', 'utf8')], [buf.slice(0, -1), Buffer.from('012345678', 'utf8')], [buf.slice(2, -2), Buffer.from('234567', 'utf8')], [buf.slice(0, 65536), Buffer.from('0123456789', 'utf8')], [buf.slice(65536, 0), Buffer.from('', 'utf8')], [buf.slice(-5, -8), Buffer.from('', 'utf8')], [buf.slice(-5, -3), Buffer.from('56', 'utf8')], [buf.slice(-10, 10), Buffer.from('0123456789', 'utf8')], [buf.slice('0', '1'), Buffer.from('0', 'utf8')], [buf.slice('-5', '10'), Buffer.from('56789', 'utf8')], [buf.slice('-10', '10'), Buffer.from('0123456789', 'utf8')], [buf.slice('-10', '-5'), Buffer.from('01234', 'utf8')], [buf.slice('-10', '-0'), Buffer.from('', 'utf8')], [buf.slice('111'), Buffer.from('', 'utf8')], [buf.slice('0', '-111'), Buffer.from('', 'utf8')],];
for (let i = 0, s = buf.toString(); i < buf.length; ++i) { expectedSameBufs.push( [buf.slice(i), Buffer.from(s.slice(i))], [buf.slice(0, i), Buffer.from(s.slice(0, i))], [buf.slice(-i), Buffer.from(s.slice(-i))], [buf.slice(0, -i), Buffer.from(s.slice(0, -i))] );}
expectedSameBufs.forEach(([buf1, buf2]) => { assert.strictEqual(Buffer.compare(buf1, buf2), 0);});
const utf16Buf = Buffer.from('0123456789', 'utf16le');assert.deepStrictEqual(utf16Buf.slice(0, 6), Buffer.from('012', 'utf16le'));// Try to slice a zero length Buffer.// See https://github.com/joyent/node/issues/5881assert.strictEqual(Buffer.alloc(0).slice(0, 1).length, 0);
{ // Single argument slice assert.strictEqual(Buffer.from('abcde', 'utf8').slice(1).toString('utf8'), 'bcde');}
// slice(0,0).length === 0assert.strictEqual(Buffer.from('hello', 'utf8').slice(0, 0).length, 0);
{ // Regression tests for https://github.com/nodejs/node/issues/9096 const buf = Buffer.from('abcd', 'utf8'); assert.strictEqual(buf.slice(buf.length / 3).toString('utf8'), 'bcd'); assert.strictEqual( buf.slice(buf.length / 3, buf.length).toString(), 'bcd' );}
{ const buf = Buffer.from('abcdefg', 'utf8'); assert.strictEqual(buf.slice(-(-1 >>> 0) - 1).toString('utf8'), buf.toString('utf8'));}
{ const buf = Buffer.from('abc', 'utf8'); assert.strictEqual(buf.slice(-0.5).toString('utf8'), buf.toString('utf8'));}
{ const buf = Buffer.from([ 1, 29, 0, 0, 1, 143, 216, 162, 92, 254, 248, 63, 0, 0, 0, 18, 184, 6, 0, 175, 29, 0, 8, 11, 1, 0, 0, ]); const chunk1 = Buffer.from([ 1, 29, 0, 0, 1, 143, 216, 162, 92, 254, 248, 63, 0, ]); const chunk2 = Buffer.from([ 0, 0, 18, 184, 6, 0, 175, 29, 0, 8, 11, 1, 0, 0, ]); const middle = buf.length / 2;
assert.deepStrictEqual(buf.slice(0, middle), chunk1); assert.deepStrictEqual(buf.slice(middle), chunk2);}
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