1c4aa61388Use forEach loop to reduce some redundant codes. PR-URL: https://github.com/nodejs/node/pull/17962 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Jon Moss <me@jonathanmoss.me> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
109 lines
3.9 KiB
JavaScript
109 lines
3.9 KiB
JavaScript
'use strict';
|
|
|
|
require('../common');
|
|
const assert = require('assert');
|
|
|
|
assert.strictEqual(0, Buffer.from('hello', 'utf8').slice(0, 0).length);
|
|
assert.strictEqual(0, Buffer('hello', 'utf8').slice(0, 0).length);
|
|
|
|
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(0, Buffer.compare(buf1, buf2));
|
|
});
|
|
|
|
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/5881
|
|
assert.doesNotThrow(() => Buffer.alloc(0).slice(0, 1));
|
|
assert.strictEqual(Buffer.alloc(0).slice(0, 1).length, 0);
|
|
|
|
{
|
|
// Single argument slice
|
|
assert.strictEqual('bcde',
|
|
Buffer.from('abcde', 'utf8').slice(1).toString('utf8'));
|
|
}
|
|
|
|
// slice(0,0).length === 0
|
|
assert.strictEqual(0, Buffer.from('hello', 'utf8').slice(0, 0).length);
|
|
|
|
{
|
|
// 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);
|
|
}
|