source: node_modules/bl/test/indexOf.js@ 81bc7da

finki-main main
Last change on this file since 81bc7da was 81bc7da, checked in by Klimentina Efremova <klimentina08642@…>, 3 months ago

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1'use strict'
2
3const tape = require('tape')
4const BufferList = require('../')
5const { Buffer } = require('buffer')
6
7tape('indexOf single byte needle', (t) => {
8 const bl = new BufferList(['abcdefg', 'abcdefg', '12345'])
9
10 t.equal(bl.indexOf('e'), 4)
11 t.equal(bl.indexOf('e', 5), 11)
12 t.equal(bl.indexOf('e', 12), -1)
13 t.equal(bl.indexOf('5'), 18)
14
15 t.end()
16})
17
18tape('indexOf multiple byte needle', (t) => {
19 const bl = new BufferList(['abcdefg', 'abcdefg'])
20
21 t.equal(bl.indexOf('ef'), 4)
22 t.equal(bl.indexOf('ef', 5), 11)
23
24 t.end()
25})
26
27tape('indexOf multiple byte needles across buffer boundaries', (t) => {
28 const bl = new BufferList(['abcdefg', 'abcdefg'])
29
30 t.equal(bl.indexOf('fgabc'), 5)
31
32 t.end()
33})
34
35tape('indexOf takes a Uint8Array search', (t) => {
36 const bl = new BufferList(['abcdefg', 'abcdefg'])
37 const search = new Uint8Array([102, 103, 97, 98, 99]) // fgabc
38
39 t.equal(bl.indexOf(search), 5)
40
41 t.end()
42})
43
44tape('indexOf takes a buffer list search', (t) => {
45 const bl = new BufferList(['abcdefg', 'abcdefg'])
46 const search = new BufferList('fgabc')
47
48 t.equal(bl.indexOf(search), 5)
49
50 t.end()
51})
52
53tape('indexOf a zero byte needle', (t) => {
54 const b = new BufferList('abcdef')
55 const bufEmpty = Buffer.from('')
56
57 t.equal(b.indexOf(''), 0)
58 t.equal(b.indexOf('', 1), 1)
59 t.equal(b.indexOf('', b.length + 1), b.length)
60 t.equal(b.indexOf('', Infinity), b.length)
61 t.equal(b.indexOf(bufEmpty), 0)
62 t.equal(b.indexOf(bufEmpty, 1), 1)
63 t.equal(b.indexOf(bufEmpty, b.length + 1), b.length)
64 t.equal(b.indexOf(bufEmpty, Infinity), b.length)
65
66 t.end()
67})
68
69tape('indexOf buffers smaller and larger than the needle', (t) => {
70 const bl = new BufferList(['abcdefg', 'a', 'bcdefg', 'a', 'bcfgab'])
71
72 t.equal(bl.indexOf('fgabc'), 5)
73 t.equal(bl.indexOf('fgabc', 6), 12)
74 t.equal(bl.indexOf('fgabc', 13), -1)
75
76 t.end()
77})
78
79// only present in node 6+
80;(process.version.substr(1).split('.')[0] >= 6) && tape('indexOf latin1 and binary encoding', (t) => {
81 const b = new BufferList('abcdef')
82
83 // test latin1 encoding
84 t.equal(
85 new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
86 .indexOf('d', 0, 'latin1'),
87 3
88 )
89 t.equal(
90 new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
91 .indexOf(Buffer.from('d', 'latin1'), 0, 'latin1'),
92 3
93 )
94 t.equal(
95 new BufferList(Buffer.from('aa\u00e8aa', 'latin1'))
96 .indexOf('\u00e8', 'latin1'),
97 2
98 )
99 t.equal(
100 new BufferList(Buffer.from('\u00e8', 'latin1'))
101 .indexOf('\u00e8', 'latin1'),
102 0
103 )
104 t.equal(
105 new BufferList(Buffer.from('\u00e8', 'latin1'))
106 .indexOf(Buffer.from('\u00e8', 'latin1'), 'latin1'),
107 0
108 )
109
110 // test binary encoding
111 t.equal(
112 new BufferList(Buffer.from(b.toString('binary'), 'binary'))
113 .indexOf('d', 0, 'binary'),
114 3
115 )
116 t.equal(
117 new BufferList(Buffer.from(b.toString('binary'), 'binary'))
118 .indexOf(Buffer.from('d', 'binary'), 0, 'binary'),
119 3
120 )
121 t.equal(
122 new BufferList(Buffer.from('aa\u00e8aa', 'binary'))
123 .indexOf('\u00e8', 'binary'),
124 2
125 )
126 t.equal(
127 new BufferList(Buffer.from('\u00e8', 'binary'))
128 .indexOf('\u00e8', 'binary'),
129 0
130 )
131 t.equal(
132 new BufferList(Buffer.from('\u00e8', 'binary'))
133 .indexOf(Buffer.from('\u00e8', 'binary'), 'binary'),
134 0
135 )
136
137 t.end()
138})
139
140tape('indexOf the entire nodejs10 buffer test suite', (t) => {
141 const b = new BufferList('abcdef')
142 const bufA = Buffer.from('a')
143 const bufBc = Buffer.from('bc')
144 const bufF = Buffer.from('f')
145 const bufZ = Buffer.from('z')
146
147 const stringComparison = 'abcdef'
148
149 t.equal(b.indexOf('a'), 0)
150 t.equal(b.indexOf('a', 1), -1)
151 t.equal(b.indexOf('a', -1), -1)
152 t.equal(b.indexOf('a', -4), -1)
153 t.equal(b.indexOf('a', -b.length), 0)
154 t.equal(b.indexOf('a', NaN), 0)
155 t.equal(b.indexOf('a', -Infinity), 0)
156 t.equal(b.indexOf('a', Infinity), -1)
157 t.equal(b.indexOf('bc'), 1)
158 t.equal(b.indexOf('bc', 2), -1)
159 t.equal(b.indexOf('bc', -1), -1)
160 t.equal(b.indexOf('bc', -3), -1)
161 t.equal(b.indexOf('bc', -5), 1)
162 t.equal(b.indexOf('bc', NaN), 1)
163 t.equal(b.indexOf('bc', -Infinity), 1)
164 t.equal(b.indexOf('bc', Infinity), -1)
165 t.equal(b.indexOf('f'), b.length - 1)
166 t.equal(b.indexOf('z'), -1)
167
168 // empty search tests
169 t.equal(b.indexOf(bufA), 0)
170 t.equal(b.indexOf(bufA, 1), -1)
171 t.equal(b.indexOf(bufA, -1), -1)
172 t.equal(b.indexOf(bufA, -4), -1)
173 t.equal(b.indexOf(bufA, -b.length), 0)
174 t.equal(b.indexOf(bufA, NaN), 0)
175 t.equal(b.indexOf(bufA, -Infinity), 0)
176 t.equal(b.indexOf(bufA, Infinity), -1)
177 t.equal(b.indexOf(bufBc), 1)
178 t.equal(b.indexOf(bufBc, 2), -1)
179 t.equal(b.indexOf(bufBc, -1), -1)
180 t.equal(b.indexOf(bufBc, -3), -1)
181 t.equal(b.indexOf(bufBc, -5), 1)
182 t.equal(b.indexOf(bufBc, NaN), 1)
183 t.equal(b.indexOf(bufBc, -Infinity), 1)
184 t.equal(b.indexOf(bufBc, Infinity), -1)
185 t.equal(b.indexOf(bufF), b.length - 1)
186 t.equal(b.indexOf(bufZ), -1)
187 t.equal(b.indexOf(0x61), 0)
188 t.equal(b.indexOf(0x61, 1), -1)
189 t.equal(b.indexOf(0x61, -1), -1)
190 t.equal(b.indexOf(0x61, -4), -1)
191 t.equal(b.indexOf(0x61, -b.length), 0)
192 t.equal(b.indexOf(0x61, NaN), 0)
193 t.equal(b.indexOf(0x61, -Infinity), 0)
194 t.equal(b.indexOf(0x61, Infinity), -1)
195 t.equal(b.indexOf(0x0), -1)
196
197 // test offsets
198 t.equal(b.indexOf('d', 2), 3)
199 t.equal(b.indexOf('f', 5), 5)
200 t.equal(b.indexOf('f', -1), 5)
201 t.equal(b.indexOf('f', 6), -1)
202
203 t.equal(b.indexOf(Buffer.from('d'), 2), 3)
204 t.equal(b.indexOf(Buffer.from('f'), 5), 5)
205 t.equal(b.indexOf(Buffer.from('f'), -1), 5)
206 t.equal(b.indexOf(Buffer.from('f'), 6), -1)
207
208 t.equal(Buffer.from('ff').indexOf(Buffer.from('f'), 1, 'ucs2'), -1)
209
210 // test invalid and uppercase encoding
211 t.equal(b.indexOf('b', 'utf8'), 1)
212 t.equal(b.indexOf('b', 'UTF8'), 1)
213 t.equal(b.indexOf('62', 'HEX'), 1)
214 t.throws(() => b.indexOf('bad', 'enc'), TypeError)
215
216 // test hex encoding
217 t.equal(
218 Buffer.from(b.toString('hex'), 'hex')
219 .indexOf('64', 0, 'hex'),
220 3
221 )
222 t.equal(
223 Buffer.from(b.toString('hex'), 'hex')
224 .indexOf(Buffer.from('64', 'hex'), 0, 'hex'),
225 3
226 )
227
228 // test base64 encoding
229 t.equal(
230 Buffer.from(b.toString('base64'), 'base64')
231 .indexOf('ZA==', 0, 'base64'),
232 3
233 )
234 t.equal(
235 Buffer.from(b.toString('base64'), 'base64')
236 .indexOf(Buffer.from('ZA==', 'base64'), 0, 'base64'),
237 3
238 )
239
240 // test ascii encoding
241 t.equal(
242 Buffer.from(b.toString('ascii'), 'ascii')
243 .indexOf('d', 0, 'ascii'),
244 3
245 )
246 t.equal(
247 Buffer.from(b.toString('ascii'), 'ascii')
248 .indexOf(Buffer.from('d', 'ascii'), 0, 'ascii'),
249 3
250 )
251
252 // test optional offset with passed encoding
253 t.equal(Buffer.from('aaaa0').indexOf('30', 'hex'), 4)
254 t.equal(Buffer.from('aaaa00a').indexOf('3030', 'hex'), 4)
255
256 {
257 // test usc2 encoding
258 const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
259
260 t.equal(8, twoByteString.indexOf('\u0395', 4, 'ucs2'))
261 t.equal(6, twoByteString.indexOf('\u03a3', -4, 'ucs2'))
262 t.equal(4, twoByteString.indexOf('\u03a3', -6, 'ucs2'))
263 t.equal(4, twoByteString.indexOf(
264 Buffer.from('\u03a3', 'ucs2'), -6, 'ucs2'))
265 t.equal(-1, twoByteString.indexOf('\u03a3', -2, 'ucs2'))
266 }
267
268 const mixedByteStringUcs2 =
269 Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395', 'ucs2')
270
271 t.equal(6, mixedByteStringUcs2.indexOf('bc', 0, 'ucs2'))
272 t.equal(10, mixedByteStringUcs2.indexOf('\u03a3', 0, 'ucs2'))
273 t.equal(-1, mixedByteStringUcs2.indexOf('\u0396', 0, 'ucs2'))
274
275 t.equal(
276 6, mixedByteStringUcs2.indexOf(Buffer.from('bc', 'ucs2'), 0, 'ucs2'))
277 t.equal(
278 10, mixedByteStringUcs2.indexOf(Buffer.from('\u03a3', 'ucs2'), 0, 'ucs2'))
279 t.equal(
280 -1, mixedByteStringUcs2.indexOf(Buffer.from('\u0396', 'ucs2'), 0, 'ucs2'))
281
282 {
283 const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
284
285 // Test single char pattern
286 t.equal(0, twoByteString.indexOf('\u039a', 0, 'ucs2'))
287 let index = twoByteString.indexOf('\u0391', 0, 'ucs2')
288 t.equal(2, index, `Alpha - at index ${index}`)
289 index = twoByteString.indexOf('\u03a3', 0, 'ucs2')
290 t.equal(4, index, `First Sigma - at index ${index}`)
291 index = twoByteString.indexOf('\u03a3', 6, 'ucs2')
292 t.equal(6, index, `Second Sigma - at index ${index}`)
293 index = twoByteString.indexOf('\u0395', 0, 'ucs2')
294 t.equal(8, index, `Epsilon - at index ${index}`)
295 index = twoByteString.indexOf('\u0392', 0, 'ucs2')
296 t.equal(-1, index, `Not beta - at index ${index}`)
297
298 // Test multi-char pattern
299 index = twoByteString.indexOf('\u039a\u0391', 0, 'ucs2')
300 t.equal(0, index, `Lambda Alpha - at index ${index}`)
301 index = twoByteString.indexOf('\u0391\u03a3', 0, 'ucs2')
302 t.equal(2, index, `Alpha Sigma - at index ${index}`)
303 index = twoByteString.indexOf('\u03a3\u03a3', 0, 'ucs2')
304 t.equal(4, index, `Sigma Sigma - at index ${index}`)
305 index = twoByteString.indexOf('\u03a3\u0395', 0, 'ucs2')
306 t.equal(6, index, `Sigma Epsilon - at index ${index}`)
307 }
308
309 const mixedByteStringUtf8 = Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395')
310
311 t.equal(5, mixedByteStringUtf8.indexOf('bc'))
312 t.equal(5, mixedByteStringUtf8.indexOf('bc', 5))
313 t.equal(5, mixedByteStringUtf8.indexOf('bc', -8))
314 t.equal(7, mixedByteStringUtf8.indexOf('\u03a3'))
315 t.equal(-1, mixedByteStringUtf8.indexOf('\u0396'))
316
317 // Test complex string indexOf algorithms. Only trigger for long strings.
318 // Long string that isn't a simple repeat of a shorter string.
319 let longString = 'A'
320 for (let i = 66; i < 76; i++) { // from 'B' to 'K'
321 longString = longString + String.fromCharCode(i) + longString
322 }
323
324 const longBufferString = Buffer.from(longString)
325
326 // pattern of 15 chars, repeated every 16 chars in long
327 let pattern = 'ABACABADABACABA'
328 for (let i = 0; i < longBufferString.length - pattern.length; i += 7) {
329 const index = longBufferString.indexOf(pattern, i)
330 t.equal((i + 15) & ~0xf, index,
331 `Long ABACABA...-string at index ${i}`)
332 }
333
334 let index = longBufferString.indexOf('AJABACA')
335 t.equal(510, index, `Long AJABACA, First J - at index ${index}`)
336 index = longBufferString.indexOf('AJABACA', 511)
337 t.equal(1534, index, `Long AJABACA, Second J - at index ${index}`)
338
339 pattern = 'JABACABADABACABA'
340 index = longBufferString.indexOf(pattern)
341 t.equal(511, index, `Long JABACABA..., First J - at index ${index}`)
342 index = longBufferString.indexOf(pattern, 512)
343 t.equal(
344 1535, index, `Long JABACABA..., Second J - at index ${index}`)
345
346 // Search for a non-ASCII string in a pure ASCII string.
347 const asciiString = Buffer.from(
348 'somethingnotatallsinisterwhichalsoworks')
349 t.equal(-1, asciiString.indexOf('\x2061'))
350 t.equal(3, asciiString.indexOf('eth', 0))
351
352 // Search in string containing many non-ASCII chars.
353 const allCodePoints = []
354 for (let i = 0; i < 65536; i++) {
355 allCodePoints[i] = i
356 }
357
358 const allCharsString = String.fromCharCode.apply(String, allCodePoints)
359 const allCharsBufferUtf8 = Buffer.from(allCharsString)
360 const allCharsBufferUcs2 = Buffer.from(allCharsString, 'ucs2')
361
362 // Search for string long enough to trigger complex search with ASCII pattern
363 // and UC16 subject.
364 t.equal(-1, allCharsBufferUtf8.indexOf('notfound'))
365 t.equal(-1, allCharsBufferUcs2.indexOf('notfound'))
366
367 // Needle is longer than haystack, but only because it's encoded as UTF-16
368 t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'ucs2'), -1)
369
370 t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'utf8'), 0)
371 t.equal(Buffer.from('aaaa').indexOf('你好', 'ucs2'), -1)
372
373 // Haystack has odd length, but the needle is UCS2.
374 t.equal(Buffer.from('aaaaa').indexOf('b', 'ucs2'), -1)
375
376 {
377 // Find substrings in Utf8.
378 const lengths = [1, 3, 15] // Single char, simple and complex.
379 const indices = [0x5, 0x60, 0x400, 0x680, 0x7ee, 0xFF02, 0x16610, 0x2f77b]
380 for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
381 for (let i = 0; i < indices.length; i++) {
382 const index = indices[i]
383 let length = lengths[lengthIndex]
384
385 if (index + length > 0x7F) {
386 length = 2 * length
387 }
388
389 if (index + length > 0x7FF) {
390 length = 3 * length
391 }
392
393 if (index + length > 0xFFFF) {
394 length = 4 * length
395 }
396
397 const patternBufferUtf8 = allCharsBufferUtf8.slice(index, index + length)
398 t.equal(index, allCharsBufferUtf8.indexOf(patternBufferUtf8))
399
400 const patternStringUtf8 = patternBufferUtf8.toString()
401 t.equal(index, allCharsBufferUtf8.indexOf(patternStringUtf8))
402 }
403 }
404 }
405
406 {
407 // Find substrings in Usc2.
408 const lengths = [2, 4, 16] // Single char, simple and complex.
409 const indices = [0x5, 0x65, 0x105, 0x205, 0x285, 0x2005, 0x2085, 0xfff0]
410
411 for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
412 for (let i = 0; i < indices.length; i++) {
413 const index = indices[i] * 2
414 const length = lengths[lengthIndex]
415
416 const patternBufferUcs2 =
417 allCharsBufferUcs2.slice(index, index + length)
418 t.equal(
419 index, allCharsBufferUcs2.indexOf(patternBufferUcs2, 0, 'ucs2'))
420
421 const patternStringUcs2 = patternBufferUcs2.toString('ucs2')
422 t.equal(
423 index, allCharsBufferUcs2.indexOf(patternStringUcs2, 0, 'ucs2'))
424 }
425 }
426 }
427
428 [
429 () => {},
430 {},
431 []
432 ].forEach((val) => {
433 t.throws(() => b.indexOf(val), TypeError, `"${JSON.stringify(val)}" should throw`)
434 })
435
436 // Test weird offset arguments.
437 // The following offsets coerce to NaN or 0, searching the whole Buffer
438 t.equal(b.indexOf('b', undefined), 1)
439 t.equal(b.indexOf('b', {}), 1)
440 t.equal(b.indexOf('b', 0), 1)
441 t.equal(b.indexOf('b', null), 1)
442 t.equal(b.indexOf('b', []), 1)
443
444 // The following offset coerces to 2, in other words +[2] === 2
445 t.equal(b.indexOf('b', [2]), -1)
446
447 // Behavior should match String.indexOf()
448 t.equal(
449 b.indexOf('b', undefined),
450 stringComparison.indexOf('b', undefined))
451 t.equal(
452 b.indexOf('b', {}),
453 stringComparison.indexOf('b', {}))
454 t.equal(
455 b.indexOf('b', 0),
456 stringComparison.indexOf('b', 0))
457 t.equal(
458 b.indexOf('b', null),
459 stringComparison.indexOf('b', null))
460 t.equal(
461 b.indexOf('b', []),
462 stringComparison.indexOf('b', []))
463 t.equal(
464 b.indexOf('b', [2]),
465 stringComparison.indexOf('b', [2]))
466
467 // test truncation of Number arguments to uint8
468 {
469 const buf = Buffer.from('this is a test')
470
471 t.equal(buf.indexOf(0x6973), 3)
472 t.equal(buf.indexOf(0x697320), 4)
473 t.equal(buf.indexOf(0x69732069), 2)
474 t.equal(buf.indexOf(0x697374657374), 0)
475 t.equal(buf.indexOf(0x69737374), 0)
476 t.equal(buf.indexOf(0x69737465), 11)
477 t.equal(buf.indexOf(0x69737465), 11)
478 t.equal(buf.indexOf(-140), 0)
479 t.equal(buf.indexOf(-152), 1)
480 t.equal(buf.indexOf(0xff), -1)
481 t.equal(buf.indexOf(0xffff), -1)
482 }
483
484 // Test that Uint8Array arguments are okay.
485 {
486 const needle = new Uint8Array([0x66, 0x6f, 0x6f])
487 const haystack = new BufferList(Buffer.from('a foo b foo'))
488 t.equal(haystack.indexOf(needle), 2)
489 }
490
491 t.end()
492})
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