493 lines
15 KiB
JavaScript
493 lines
15 KiB
JavaScript
'use strict'
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const tape = require('tape')
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const BufferList = require('../')
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const { Buffer } = require('buffer')
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tape('indexOf single byte needle', (t) => {
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const bl = new BufferList(['abcdefg', 'abcdefg', '12345'])
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t.equal(bl.indexOf('e'), 4)
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t.equal(bl.indexOf('e', 5), 11)
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t.equal(bl.indexOf('e', 12), -1)
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t.equal(bl.indexOf('5'), 18)
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t.end()
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})
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tape('indexOf multiple byte needle', (t) => {
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const bl = new BufferList(['abcdefg', 'abcdefg'])
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t.equal(bl.indexOf('ef'), 4)
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t.equal(bl.indexOf('ef', 5), 11)
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t.end()
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})
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tape('indexOf multiple byte needles across buffer boundaries', (t) => {
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const bl = new BufferList(['abcdefg', 'abcdefg'])
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t.equal(bl.indexOf('fgabc'), 5)
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t.end()
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})
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tape('indexOf takes a Uint8Array search', (t) => {
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const bl = new BufferList(['abcdefg', 'abcdefg'])
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const search = new Uint8Array([102, 103, 97, 98, 99]) // fgabc
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t.equal(bl.indexOf(search), 5)
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t.end()
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})
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tape('indexOf takes a buffer list search', (t) => {
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const bl = new BufferList(['abcdefg', 'abcdefg'])
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const search = new BufferList('fgabc')
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t.equal(bl.indexOf(search), 5)
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t.end()
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})
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tape('indexOf a zero byte needle', (t) => {
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const b = new BufferList('abcdef')
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const bufEmpty = Buffer.from('')
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t.equal(b.indexOf(''), 0)
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t.equal(b.indexOf('', 1), 1)
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t.equal(b.indexOf('', b.length + 1), b.length)
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t.equal(b.indexOf('', Infinity), b.length)
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t.equal(b.indexOf(bufEmpty), 0)
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t.equal(b.indexOf(bufEmpty, 1), 1)
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t.equal(b.indexOf(bufEmpty, b.length + 1), b.length)
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t.equal(b.indexOf(bufEmpty, Infinity), b.length)
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t.end()
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})
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tape('indexOf buffers smaller and larger than the needle', (t) => {
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const bl = new BufferList(['abcdefg', 'a', 'bcdefg', 'a', 'bcfgab'])
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t.equal(bl.indexOf('fgabc'), 5)
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t.equal(bl.indexOf('fgabc', 6), 12)
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t.equal(bl.indexOf('fgabc', 13), -1)
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t.end()
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})
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// only present in node 6+
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;(process.version.substr(1).split('.')[0] >= 6) && tape('indexOf latin1 and binary encoding', (t) => {
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const b = new BufferList('abcdef')
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// test latin1 encoding
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t.equal(
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new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
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.indexOf('d', 0, 'latin1'),
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3
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)
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t.equal(
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new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
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.indexOf(Buffer.from('d', 'latin1'), 0, 'latin1'),
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3
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)
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t.equal(
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new BufferList(Buffer.from('aa\u00e8aa', 'latin1'))
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.indexOf('\u00e8', 'latin1'),
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2
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)
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t.equal(
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new BufferList(Buffer.from('\u00e8', 'latin1'))
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.indexOf('\u00e8', 'latin1'),
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0
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)
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t.equal(
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new BufferList(Buffer.from('\u00e8', 'latin1'))
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.indexOf(Buffer.from('\u00e8', 'latin1'), 'latin1'),
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0
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)
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// test binary encoding
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t.equal(
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new BufferList(Buffer.from(b.toString('binary'), 'binary'))
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.indexOf('d', 0, 'binary'),
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3
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)
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t.equal(
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new BufferList(Buffer.from(b.toString('binary'), 'binary'))
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.indexOf(Buffer.from('d', 'binary'), 0, 'binary'),
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3
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)
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t.equal(
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new BufferList(Buffer.from('aa\u00e8aa', 'binary'))
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.indexOf('\u00e8', 'binary'),
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2
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)
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t.equal(
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new BufferList(Buffer.from('\u00e8', 'binary'))
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.indexOf('\u00e8', 'binary'),
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0
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)
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t.equal(
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new BufferList(Buffer.from('\u00e8', 'binary'))
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.indexOf(Buffer.from('\u00e8', 'binary'), 'binary'),
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0
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)
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t.end()
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})
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tape('indexOf the entire nodejs10 buffer test suite', (t) => {
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const b = new BufferList('abcdef')
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const bufA = Buffer.from('a')
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const bufBc = Buffer.from('bc')
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const bufF = Buffer.from('f')
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const bufZ = Buffer.from('z')
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const stringComparison = 'abcdef'
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t.equal(b.indexOf('a'), 0)
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t.equal(b.indexOf('a', 1), -1)
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t.equal(b.indexOf('a', -1), -1)
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t.equal(b.indexOf('a', -4), -1)
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t.equal(b.indexOf('a', -b.length), 0)
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t.equal(b.indexOf('a', NaN), 0)
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t.equal(b.indexOf('a', -Infinity), 0)
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t.equal(b.indexOf('a', Infinity), -1)
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t.equal(b.indexOf('bc'), 1)
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t.equal(b.indexOf('bc', 2), -1)
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t.equal(b.indexOf('bc', -1), -1)
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t.equal(b.indexOf('bc', -3), -1)
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t.equal(b.indexOf('bc', -5), 1)
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t.equal(b.indexOf('bc', NaN), 1)
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t.equal(b.indexOf('bc', -Infinity), 1)
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t.equal(b.indexOf('bc', Infinity), -1)
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t.equal(b.indexOf('f'), b.length - 1)
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t.equal(b.indexOf('z'), -1)
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// empty search tests
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t.equal(b.indexOf(bufA), 0)
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t.equal(b.indexOf(bufA, 1), -1)
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t.equal(b.indexOf(bufA, -1), -1)
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t.equal(b.indexOf(bufA, -4), -1)
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t.equal(b.indexOf(bufA, -b.length), 0)
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t.equal(b.indexOf(bufA, NaN), 0)
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t.equal(b.indexOf(bufA, -Infinity), 0)
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t.equal(b.indexOf(bufA, Infinity), -1)
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t.equal(b.indexOf(bufBc), 1)
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t.equal(b.indexOf(bufBc, 2), -1)
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t.equal(b.indexOf(bufBc, -1), -1)
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t.equal(b.indexOf(bufBc, -3), -1)
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t.equal(b.indexOf(bufBc, -5), 1)
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t.equal(b.indexOf(bufBc, NaN), 1)
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t.equal(b.indexOf(bufBc, -Infinity), 1)
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t.equal(b.indexOf(bufBc, Infinity), -1)
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t.equal(b.indexOf(bufF), b.length - 1)
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t.equal(b.indexOf(bufZ), -1)
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t.equal(b.indexOf(0x61), 0)
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t.equal(b.indexOf(0x61, 1), -1)
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t.equal(b.indexOf(0x61, -1), -1)
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t.equal(b.indexOf(0x61, -4), -1)
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t.equal(b.indexOf(0x61, -b.length), 0)
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t.equal(b.indexOf(0x61, NaN), 0)
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t.equal(b.indexOf(0x61, -Infinity), 0)
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t.equal(b.indexOf(0x61, Infinity), -1)
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t.equal(b.indexOf(0x0), -1)
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// test offsets
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t.equal(b.indexOf('d', 2), 3)
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t.equal(b.indexOf('f', 5), 5)
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t.equal(b.indexOf('f', -1), 5)
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t.equal(b.indexOf('f', 6), -1)
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t.equal(b.indexOf(Buffer.from('d'), 2), 3)
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t.equal(b.indexOf(Buffer.from('f'), 5), 5)
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t.equal(b.indexOf(Buffer.from('f'), -1), 5)
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t.equal(b.indexOf(Buffer.from('f'), 6), -1)
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t.equal(Buffer.from('ff').indexOf(Buffer.from('f'), 1, 'ucs2'), -1)
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// test invalid and uppercase encoding
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t.equal(b.indexOf('b', 'utf8'), 1)
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t.equal(b.indexOf('b', 'UTF8'), 1)
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t.equal(b.indexOf('62', 'HEX'), 1)
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t.throws(() => b.indexOf('bad', 'enc'), TypeError)
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// test hex encoding
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t.equal(
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Buffer.from(b.toString('hex'), 'hex')
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.indexOf('64', 0, 'hex'),
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3
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)
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t.equal(
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Buffer.from(b.toString('hex'), 'hex')
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.indexOf(Buffer.from('64', 'hex'), 0, 'hex'),
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3
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)
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// test base64 encoding
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t.equal(
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Buffer.from(b.toString('base64'), 'base64')
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.indexOf('ZA==', 0, 'base64'),
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3
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)
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t.equal(
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Buffer.from(b.toString('base64'), 'base64')
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.indexOf(Buffer.from('ZA==', 'base64'), 0, 'base64'),
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3
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)
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// test ascii encoding
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t.equal(
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Buffer.from(b.toString('ascii'), 'ascii')
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.indexOf('d', 0, 'ascii'),
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3
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)
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t.equal(
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Buffer.from(b.toString('ascii'), 'ascii')
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.indexOf(Buffer.from('d', 'ascii'), 0, 'ascii'),
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3
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)
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// test optional offset with passed encoding
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t.equal(Buffer.from('aaaa0').indexOf('30', 'hex'), 4)
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t.equal(Buffer.from('aaaa00a').indexOf('3030', 'hex'), 4)
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{
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// test usc2 encoding
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const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
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t.equal(8, twoByteString.indexOf('\u0395', 4, 'ucs2'))
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t.equal(6, twoByteString.indexOf('\u03a3', -4, 'ucs2'))
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t.equal(4, twoByteString.indexOf('\u03a3', -6, 'ucs2'))
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t.equal(4, twoByteString.indexOf(
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Buffer.from('\u03a3', 'ucs2'), -6, 'ucs2'))
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t.equal(-1, twoByteString.indexOf('\u03a3', -2, 'ucs2'))
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}
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const mixedByteStringUcs2 =
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Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395', 'ucs2')
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t.equal(6, mixedByteStringUcs2.indexOf('bc', 0, 'ucs2'))
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t.equal(10, mixedByteStringUcs2.indexOf('\u03a3', 0, 'ucs2'))
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t.equal(-1, mixedByteStringUcs2.indexOf('\u0396', 0, 'ucs2'))
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t.equal(
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6, mixedByteStringUcs2.indexOf(Buffer.from('bc', 'ucs2'), 0, 'ucs2'))
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t.equal(
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10, mixedByteStringUcs2.indexOf(Buffer.from('\u03a3', 'ucs2'), 0, 'ucs2'))
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t.equal(
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-1, mixedByteStringUcs2.indexOf(Buffer.from('\u0396', 'ucs2'), 0, 'ucs2'))
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{
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const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
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// Test single char pattern
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t.equal(0, twoByteString.indexOf('\u039a', 0, 'ucs2'))
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let index = twoByteString.indexOf('\u0391', 0, 'ucs2')
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t.equal(2, index, `Alpha - at index ${index}`)
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index = twoByteString.indexOf('\u03a3', 0, 'ucs2')
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t.equal(4, index, `First Sigma - at index ${index}`)
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index = twoByteString.indexOf('\u03a3', 6, 'ucs2')
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t.equal(6, index, `Second Sigma - at index ${index}`)
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index = twoByteString.indexOf('\u0395', 0, 'ucs2')
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t.equal(8, index, `Epsilon - at index ${index}`)
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index = twoByteString.indexOf('\u0392', 0, 'ucs2')
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t.equal(-1, index, `Not beta - at index ${index}`)
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// Test multi-char pattern
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index = twoByteString.indexOf('\u039a\u0391', 0, 'ucs2')
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t.equal(0, index, `Lambda Alpha - at index ${index}`)
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index = twoByteString.indexOf('\u0391\u03a3', 0, 'ucs2')
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t.equal(2, index, `Alpha Sigma - at index ${index}`)
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index = twoByteString.indexOf('\u03a3\u03a3', 0, 'ucs2')
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t.equal(4, index, `Sigma Sigma - at index ${index}`)
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index = twoByteString.indexOf('\u03a3\u0395', 0, 'ucs2')
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t.equal(6, index, `Sigma Epsilon - at index ${index}`)
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}
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const mixedByteStringUtf8 = Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395')
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t.equal(5, mixedByteStringUtf8.indexOf('bc'))
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t.equal(5, mixedByteStringUtf8.indexOf('bc', 5))
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t.equal(5, mixedByteStringUtf8.indexOf('bc', -8))
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t.equal(7, mixedByteStringUtf8.indexOf('\u03a3'))
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t.equal(-1, mixedByteStringUtf8.indexOf('\u0396'))
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// Test complex string indexOf algorithms. Only trigger for long strings.
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// Long string that isn't a simple repeat of a shorter string.
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let longString = 'A'
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for (let i = 66; i < 76; i++) { // from 'B' to 'K'
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longString = longString + String.fromCharCode(i) + longString
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}
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const longBufferString = Buffer.from(longString)
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// pattern of 15 chars, repeated every 16 chars in long
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let pattern = 'ABACABADABACABA'
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for (let i = 0; i < longBufferString.length - pattern.length; i += 7) {
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const index = longBufferString.indexOf(pattern, i)
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t.equal((i + 15) & ~0xf, index,
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`Long ABACABA...-string at index ${i}`)
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}
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let index = longBufferString.indexOf('AJABACA')
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t.equal(510, index, `Long AJABACA, First J - at index ${index}`)
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index = longBufferString.indexOf('AJABACA', 511)
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t.equal(1534, index, `Long AJABACA, Second J - at index ${index}`)
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pattern = 'JABACABADABACABA'
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index = longBufferString.indexOf(pattern)
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t.equal(511, index, `Long JABACABA..., First J - at index ${index}`)
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index = longBufferString.indexOf(pattern, 512)
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t.equal(
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1535, index, `Long JABACABA..., Second J - at index ${index}`)
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// Search for a non-ASCII string in a pure ASCII string.
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const asciiString = Buffer.from(
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'somethingnotatallsinisterwhichalsoworks')
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t.equal(-1, asciiString.indexOf('\x2061'))
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t.equal(3, asciiString.indexOf('eth', 0))
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// Search in string containing many non-ASCII chars.
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const allCodePoints = []
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for (let i = 0; i < 65536; i++) {
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allCodePoints[i] = i
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}
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const allCharsString = String.fromCharCode.apply(String, allCodePoints)
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const allCharsBufferUtf8 = Buffer.from(allCharsString)
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const allCharsBufferUcs2 = Buffer.from(allCharsString, 'ucs2')
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// Search for string long enough to trigger complex search with ASCII pattern
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// and UC16 subject.
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t.equal(-1, allCharsBufferUtf8.indexOf('notfound'))
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t.equal(-1, allCharsBufferUcs2.indexOf('notfound'))
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// Needle is longer than haystack, but only because it's encoded as UTF-16
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t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'ucs2'), -1)
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t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'utf8'), 0)
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t.equal(Buffer.from('aaaa').indexOf('你好', 'ucs2'), -1)
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// Haystack has odd length, but the needle is UCS2.
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t.equal(Buffer.from('aaaaa').indexOf('b', 'ucs2'), -1)
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{
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// Find substrings in Utf8.
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const lengths = [1, 3, 15] // Single char, simple and complex.
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const indices = [0x5, 0x60, 0x400, 0x680, 0x7ee, 0xFF02, 0x16610, 0x2f77b]
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for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
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for (let i = 0; i < indices.length; i++) {
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const index = indices[i]
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let length = lengths[lengthIndex]
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if (index + length > 0x7F) {
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length = 2 * length
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}
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if (index + length > 0x7FF) {
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length = 3 * length
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}
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if (index + length > 0xFFFF) {
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length = 4 * length
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}
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const patternBufferUtf8 = allCharsBufferUtf8.slice(index, index + length)
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t.equal(index, allCharsBufferUtf8.indexOf(patternBufferUtf8))
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const patternStringUtf8 = patternBufferUtf8.toString()
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t.equal(index, allCharsBufferUtf8.indexOf(patternStringUtf8))
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}
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}
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}
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{
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// Find substrings in Usc2.
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const lengths = [2, 4, 16] // Single char, simple and complex.
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const indices = [0x5, 0x65, 0x105, 0x205, 0x285, 0x2005, 0x2085, 0xfff0]
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for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
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for (let i = 0; i < indices.length; i++) {
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const index = indices[i] * 2
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const length = lengths[lengthIndex]
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const patternBufferUcs2 =
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allCharsBufferUcs2.slice(index, index + length)
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t.equal(
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index, allCharsBufferUcs2.indexOf(patternBufferUcs2, 0, 'ucs2'))
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const patternStringUcs2 = patternBufferUcs2.toString('ucs2')
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t.equal(
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index, allCharsBufferUcs2.indexOf(patternStringUcs2, 0, 'ucs2'))
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}
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}
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}
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[
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() => {},
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{},
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[]
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].forEach((val) => {
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t.throws(() => b.indexOf(val), TypeError, `"${JSON.stringify(val)}" should throw`)
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})
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// Test weird offset arguments.
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// The following offsets coerce to NaN or 0, searching the whole Buffer
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t.equal(b.indexOf('b', undefined), 1)
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t.equal(b.indexOf('b', {}), 1)
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t.equal(b.indexOf('b', 0), 1)
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t.equal(b.indexOf('b', null), 1)
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t.equal(b.indexOf('b', []), 1)
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// The following offset coerces to 2, in other words +[2] === 2
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t.equal(b.indexOf('b', [2]), -1)
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// Behavior should match String.indexOf()
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t.equal(
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b.indexOf('b', undefined),
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stringComparison.indexOf('b', undefined))
|
|
t.equal(
|
|
b.indexOf('b', {}),
|
|
stringComparison.indexOf('b', {}))
|
|
t.equal(
|
|
b.indexOf('b', 0),
|
|
stringComparison.indexOf('b', 0))
|
|
t.equal(
|
|
b.indexOf('b', null),
|
|
stringComparison.indexOf('b', null))
|
|
t.equal(
|
|
b.indexOf('b', []),
|
|
stringComparison.indexOf('b', []))
|
|
t.equal(
|
|
b.indexOf('b', [2]),
|
|
stringComparison.indexOf('b', [2]))
|
|
|
|
// test truncation of Number arguments to uint8
|
|
{
|
|
const buf = Buffer.from('this is a test')
|
|
|
|
t.equal(buf.indexOf(0x6973), 3)
|
|
t.equal(buf.indexOf(0x697320), 4)
|
|
t.equal(buf.indexOf(0x69732069), 2)
|
|
t.equal(buf.indexOf(0x697374657374), 0)
|
|
t.equal(buf.indexOf(0x69737374), 0)
|
|
t.equal(buf.indexOf(0x69737465), 11)
|
|
t.equal(buf.indexOf(0x69737465), 11)
|
|
t.equal(buf.indexOf(-140), 0)
|
|
t.equal(buf.indexOf(-152), 1)
|
|
t.equal(buf.indexOf(0xff), -1)
|
|
t.equal(buf.indexOf(0xffff), -1)
|
|
}
|
|
|
|
// Test that Uint8Array arguments are okay.
|
|
{
|
|
const needle = new Uint8Array([0x66, 0x6f, 0x6f])
|
|
const haystack = new BufferList(Buffer.from('a foo b foo'))
|
|
t.equal(haystack.indexOf(needle), 2)
|
|
}
|
|
|
|
t.end()
|
|
})
|