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134 lines
4.9 KiB
134 lines
4.9 KiB
'use strict';
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require('../common');
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const assert = require('assert');
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assert.strictEqual(0, Buffer.from('hello', 'utf8').slice(0, 0).length);
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assert.strictEqual(0, Buffer('hello', 'utf8').slice(0, 0).length);
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const buf = Buffer.from('0123456789', 'utf8');
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assert.strictEqual(0, Buffer.compare(buf.slice(-10, 10),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(-20, 10),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(-20, -10),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(0),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(0, 0),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(undefined),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice('foobar'),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(undefined, undefined),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(2),
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Buffer.from('23456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(5),
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Buffer.from('56789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(10),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(5, 8),
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Buffer.from('567', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(8, -1),
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Buffer.from('8', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(-10),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(0, -9),
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Buffer.from('0', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(0, -10),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(0, -1),
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Buffer.from('012345678', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(2, -2),
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Buffer.from('234567', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(0, 65536),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(65536, 0),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(-5, -8),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(-5, -3),
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Buffer.from('56', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice(-10, 10),
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Buffer.from('0123456789', 'utf8')));
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for (let i = 0, s = buf; i < buf.length; ++i) {
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assert.strictEqual(0, Buffer.compare(buf.slice(i), s.slice(i)));
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assert.strictEqual(0, Buffer.compare(buf.slice(0, i), s.slice(0, i)));
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assert.strictEqual(0, Buffer.compare(buf.slice(-i), s.slice(-i)));
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assert.strictEqual(0, Buffer.compare(buf.slice(0, -i), s.slice(0, -i)));
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}
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const utf16Buf = Buffer.from('0123456789', 'utf16le');
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assert.deepStrictEqual(utf16Buf.slice(0, 6), Buffer.from('012', 'utf16le'));
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assert.strictEqual(0, Buffer.compare(buf.slice('0', '1'),
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Buffer.from('0', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice('-5', '10'),
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Buffer.from('56789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice('-10', '10'),
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Buffer.from('0123456789', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice('-10', '-5'),
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Buffer.from('01234', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice('-10', '-0'),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice('111'),
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Buffer.from('', 'utf8')));
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assert.strictEqual(0, Buffer.compare(buf.slice('0', '-111'),
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Buffer.from('', 'utf8')));
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// try to slice a zero length Buffer
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// see https://github.com/joyent/node/issues/5881
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assert.doesNotThrow(() => Buffer.alloc(0).slice(0, 1));
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assert.strictEqual(Buffer.alloc(0).slice(0, 1).length, 0);
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{
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// Single argument slice
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assert.strictEqual('bcde',
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Buffer.from('abcde', 'utf8').slice(1).toString('utf8'));
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}
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// slice(0,0).length === 0
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assert.strictEqual(0, Buffer.from('hello', 'utf8').slice(0, 0).length);
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{
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// Regression tests for https://github.com/nodejs/node/issues/9096
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const buf = Buffer.from('abcd', 'utf8');
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assert.strictEqual(buf.slice(buf.length / 3).toString('utf8'), 'bcd');
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assert.strictEqual(
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buf.slice(buf.length / 3, buf.length).toString(),
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'bcd'
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);
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}
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{
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const buf = Buffer.from('abcdefg', 'utf8');
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assert.strictEqual(buf.slice(-(-1 >>> 0) - 1).toString('utf8'),
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buf.toString('utf8'));
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}
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{
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const buf = Buffer.from('abc', 'utf8');
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assert.strictEqual(buf.slice(-0.5).toString('utf8'), buf.toString('utf8'));
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}
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{
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const buf = Buffer.from([
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1, 29, 0, 0, 1, 143, 216, 162, 92, 254, 248, 63, 0,
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0, 0, 18, 184, 6, 0, 175, 29, 0, 8, 11, 1, 0, 0
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]);
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const chunk1 = Buffer.from([
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1, 29, 0, 0, 1, 143, 216, 162, 92, 254, 248, 63, 0
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]);
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const chunk2 = Buffer.from([
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0, 0, 18, 184, 6, 0, 175, 29, 0, 8, 11, 1, 0, 0
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]);
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const middle = buf.length / 2;
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assert.deepStrictEqual(buf.slice(0, middle), chunk1);
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assert.deepStrictEqual(buf.slice(middle), chunk2);
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}
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