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test-buffer-includes.js
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305 lines (267 loc) · 9.58 KB
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'use strict';
const common = require('../common');
const assert = require('assert');
const b = Buffer.from('abcdef');
const buf_a = Buffer.from('a');
const buf_bc = Buffer.from('bc');
const buf_f = Buffer.from('f');
const buf_z = Buffer.from('z');
const buf_empty = Buffer.from('');
assert(b.includes('a'));
assert(!b.includes('a', 1));
assert(!b.includes('a', -1));
assert(!b.includes('a', -4));
assert(b.includes('a', -b.length));
assert(b.includes('a', NaN));
assert(b.includes('a', -Infinity));
assert(!b.includes('a', Infinity));
assert(b.includes('bc'));
assert(!b.includes('bc', 2));
assert(!b.includes('bc', -1));
assert(!b.includes('bc', -3));
assert(b.includes('bc', -5));
assert(b.includes('bc', NaN));
assert(b.includes('bc', -Infinity));
assert(!b.includes('bc', Infinity));
assert(b.includes('f'), b.length - 1);
assert(!b.includes('z'));
assert(b.includes(''));
assert(b.includes('', 1));
assert(b.includes('', b.length + 1));
assert(b.includes('', Infinity));
assert(b.includes(buf_a));
assert(!b.includes(buf_a, 1));
assert(!b.includes(buf_a, -1));
assert(!b.includes(buf_a, -4));
assert(b.includes(buf_a, -b.length));
assert(b.includes(buf_a, NaN));
assert(b.includes(buf_a, -Infinity));
assert(!b.includes(buf_a, Infinity));
assert(b.includes(buf_bc));
assert(!b.includes(buf_bc, 2));
assert(!b.includes(buf_bc, -1));
assert(!b.includes(buf_bc, -3));
assert(b.includes(buf_bc, -5));
assert(b.includes(buf_bc, NaN));
assert(b.includes(buf_bc, -Infinity));
assert(!b.includes(buf_bc, Infinity));
assert(b.includes(buf_f), b.length - 1);
assert(!b.includes(buf_z));
assert(b.includes(buf_empty));
assert(b.includes(buf_empty, 1));
assert(b.includes(buf_empty, b.length + 1));
assert(b.includes(buf_empty, Infinity));
assert(b.includes(0x61));
assert(!b.includes(0x61, 1));
assert(!b.includes(0x61, -1));
assert(!b.includes(0x61, -4));
assert(b.includes(0x61, -b.length));
assert(b.includes(0x61, NaN));
assert(b.includes(0x61, -Infinity));
assert(!b.includes(0x61, Infinity));
assert(!b.includes(0x0));
// test offsets
assert(b.includes('d', 2));
assert(b.includes('f', 5));
assert(b.includes('f', -1));
assert(!b.includes('f', 6));
assert(b.includes(Buffer.from('d'), 2));
assert(b.includes(Buffer.from('f'), 5));
assert(b.includes(Buffer.from('f'), -1));
assert(!b.includes(Buffer.from('f'), 6));
assert(!Buffer.from('ff').includes(Buffer.from('f'), 1, 'ucs2'));
// test hex encoding
assert.strictEqual(
Buffer.from(b.toString('hex'), 'hex')
.includes('64', 0, 'hex'),
true
);
assert.strictEqual(
Buffer.from(b.toString('hex'), 'hex')
.includes(Buffer.from('64', 'hex'), 0, 'hex'),
true
);
// Test base64 encoding
assert.strictEqual(
Buffer.from(b.toString('base64'), 'base64')
.includes('ZA==', 0, 'base64'),
true
);
assert.strictEqual(
Buffer.from(b.toString('base64'), 'base64')
.includes(Buffer.from('ZA==', 'base64'), 0, 'base64'),
true
);
// test ascii encoding
assert.strictEqual(
Buffer.from(b.toString('ascii'), 'ascii')
.includes('d', 0, 'ascii'),
true
);
assert.strictEqual(
Buffer.from(b.toString('ascii'), 'ascii')
.includes(Buffer.from('d', 'ascii'), 0, 'ascii'),
true
);
// Test latin1 encoding
assert.strictEqual(
Buffer.from(b.toString('latin1'), 'latin1')
.includes('d', 0, 'latin1'),
true
);
assert.strictEqual(
Buffer.from(b.toString('latin1'), 'latin1')
.includes(Buffer.from('d', 'latin1'), 0, 'latin1'),
true
);
// Test binary encoding
assert.strictEqual(
Buffer.from(b.toString('binary'), 'binary')
.includes('d', 0, 'binary'),
true
);
assert.strictEqual(
Buffer.from(b.toString('binary'), 'binary')
.includes(Buffer.from('d', 'binary'), 0, 'binary'),
true
);
// test ucs2 encoding
let twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2');
assert(twoByteString.includes('\u0395', 4, 'ucs2'));
assert(twoByteString.includes('\u03a3', -4, 'ucs2'));
assert(twoByteString.includes('\u03a3', -6, 'ucs2'));
assert(twoByteString.includes(
Buffer.from('\u03a3', 'ucs2'), -6, 'ucs2'));
assert(!twoByteString.includes('\u03a3', -2, 'ucs2'));
const mixedByteStringUcs2 =
Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395', 'ucs2');
assert(mixedByteStringUcs2.includes('bc', 0, 'ucs2'));
assert(mixedByteStringUcs2.includes('\u03a3', 0, 'ucs2'));
assert(!mixedByteStringUcs2.includes('\u0396', 0, 'ucs2'));
assert.ok(
mixedByteStringUcs2.includes(Buffer.from('bc', 'ucs2'), 0, 'ucs2'));
assert.ok(
mixedByteStringUcs2.includes(Buffer.from('\u03a3', 'ucs2'), 0, 'ucs2'));
assert.ok(
!mixedByteStringUcs2.includes(Buffer.from('\u0396', 'ucs2'), 0, 'ucs2'));
twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2');
// Test single char pattern
assert(twoByteString.includes('\u039a', 0, 'ucs2'));
assert(twoByteString.includes('\u0391', 0, 'ucs2'), 'Alpha');
assert(twoByteString.includes('\u03a3', 0, 'ucs2'), 'First Sigma');
assert(twoByteString.includes('\u03a3', 6, 'ucs2'), 'Second Sigma');
assert(twoByteString.includes('\u0395', 0, 'ucs2'), 'Epsilon');
assert(!twoByteString.includes('\u0392', 0, 'ucs2'), 'Not beta');
// Test multi-char pattern
assert(twoByteString.includes('\u039a\u0391', 0, 'ucs2'), 'Lambda Alpha');
assert(twoByteString.includes('\u0391\u03a3', 0, 'ucs2'), 'Alpha Sigma');
assert(twoByteString.includes('\u03a3\u03a3', 0, 'ucs2'), 'Sigma Sigma');
assert(twoByteString.includes('\u03a3\u0395', 0, 'ucs2'), 'Sigma Epsilon');
const mixedByteStringUtf8 = Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395');
assert(mixedByteStringUtf8.includes('bc'));
assert(mixedByteStringUtf8.includes('bc', 5));
assert(mixedByteStringUtf8.includes('bc', -8));
assert(mixedByteStringUtf8.includes('\u03a3'));
assert(!mixedByteStringUtf8.includes('\u0396'));
// Test complex string includes algorithms. Only trigger for long strings.
// Long string that isn't a simple repeat of a shorter string.
let longString = 'A';
for (let i = 66; i < 76; i++) { // from 'B' to 'K'
longString = longString + String.fromCharCode(i) + longString;
}
const longBufferString = Buffer.from(longString);
// Pattern of 15 chars, repeated every 16 chars in long
let pattern = 'ABACABADABACABA';
for (let i = 0; i < longBufferString.length - pattern.length; i += 7) {
const includes = longBufferString.includes(pattern, i);
assert(includes, `Long ABACABA...-string at index ${i}`);
}
assert(longBufferString.includes('AJABACA'), 'Long AJABACA, First J');
assert(longBufferString.includes('AJABACA', 511), 'Long AJABACA, Second J');
pattern = 'JABACABADABACABA';
assert(longBufferString.includes(pattern), 'Long JABACABA..., First J');
assert(longBufferString.includes(pattern, 512), 'Long JABACABA..., Second J');
// Search for a non-ASCII string in a pure ASCII string.
const asciiString = Buffer.from(
'arglebargleglopglyfarglebargleglopglyfarglebargleglopglyf');
assert(!asciiString.includes('\x2061'));
assert(asciiString.includes('leb', 0));
// Search in string containing many non-ASCII chars.
const allCodePoints = [];
for (let i = 0; i < 65534; i++) allCodePoints[i] = i;
const allCharsString = String.fromCharCode.apply(String, allCodePoints) +
String.fromCharCode(65534, 65535);
const allCharsBufferUtf8 = Buffer.from(allCharsString);
const allCharsBufferUcs2 = Buffer.from(allCharsString, 'ucs2');
// Search for string long enough to trigger complex search with ASCII pattern
// and UC16 subject.
assert(!allCharsBufferUtf8.includes('notfound'));
assert(!allCharsBufferUcs2.includes('notfound'));
// Find substrings in Utf8.
let lengths = [1, 3, 15]; // Single char, simple and complex.
let indices = [0x5, 0x60, 0x400, 0x680, 0x7ee, 0xFF02, 0x16610, 0x2f77b];
for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
for (let i = 0; i < indices.length; i++) {
const index = indices[i];
let length = lengths[lengthIndex];
if (index + length > 0x7F) {
length = 2 * length;
}
if (index + length > 0x7FF) {
length = 3 * length;
}
if (index + length > 0xFFFF) {
length = 4 * length;
}
const patternBufferUtf8 = allCharsBufferUtf8.slice(index, index + length);
assert(index, allCharsBufferUtf8.includes(patternBufferUtf8));
const patternStringUtf8 = patternBufferUtf8.toString();
assert(index, allCharsBufferUtf8.includes(patternStringUtf8));
}
}
// Find substrings in Usc2.
lengths = [2, 4, 16]; // Single char, simple and complex.
indices = [0x5, 0x65, 0x105, 0x205, 0x285, 0x2005, 0x2085, 0xfff0];
for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
for (let i = 0; i < indices.length; i++) {
const index = indices[i] * 2;
const length = lengths[lengthIndex];
const patternBufferUcs2 =
allCharsBufferUcs2.slice(index, index + length);
assert.ok(
allCharsBufferUcs2.includes(patternBufferUcs2, 0, 'ucs2'));
const patternStringUcs2 = patternBufferUcs2.toString('ucs2');
assert.ok(
allCharsBufferUcs2.includes(patternStringUcs2, 0, 'ucs2'));
}
}
[
() => { },
{},
[]
].forEach((val) => {
common.expectsError(
() => b.includes(val),
{
code: 'ERR_INVALID_ARG_TYPE',
type: TypeError,
message: 'The "value" argument must be one of type string, ' +
`Buffer, or Uint8Array. Received type ${typeof val}`
}
);
});
// Test truncation of Number arguments to uint8
{
const buf = Buffer.from('this is a test');
assert.ok(buf.includes(0x6973));
assert.ok(buf.includes(0x697320));
assert.ok(buf.includes(0x69732069));
assert.ok(buf.includes(0x697374657374));
assert.ok(buf.includes(0x69737374));
assert.ok(buf.includes(0x69737465));
assert.ok(buf.includes(0x69737465));
assert.ok(buf.includes(-140));
assert.ok(buf.includes(-152));
assert.ok(!buf.includes(0xff));
assert.ok(!buf.includes(0xffff));
}