Edit File: test-buffer-includes.js
'use strict'; var Buffer = require('../../').Buffer; var assert = require('assert'); var Buffer = require('../../').Buffer; var b = Buffer.from('abcdef'); var buf_a = Buffer.from('a'); var buf_bc = Buffer.from('bc'); var buf_f = Buffer.from('f'); var buf_z = Buffer.from('z'); var 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 usc2 encoding var 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')); var 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( 6, mixedByteStringUcs2.includes(Buffer.from('bc', 'ucs2'), 0, 'ucs2')); assert( 10, mixedByteStringUcs2.includes(Buffer.from('\u03a3', 'ucs2'), 0, 'ucs2')); assert( -1, 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'); var 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. var longString = 'A'; for (var i = 66; i < 76; i++) { // from 'B' to 'K' longString = longString + String.fromCharCode(i) + longString; } var longBufferString = Buffer.from(longString); // pattern of 15 chars, repeated every 16 chars in long var pattern = 'ABACABADABACABA'; for (var i = 0; i < longBufferString.length - pattern.length; i += 7) { var 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. var asciiString = Buffer.from( 'arglebargleglopglyfarglebargleglopglyfarglebargleglopglyf'); assert(!asciiString.includes('\x2061')); assert(asciiString.includes('leb', 0)); // Search in string containing many non-ASCII chars. var allCodePoints = []; for (var i = 0; i < 65536; i++) allCodePoints[i] = i; var allCharsString = String.fromCharCode.apply(String, allCodePoints); var allCharsBufferUtf8 = Buffer.from(allCharsString); var 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. var lengths = [1, 3, 15]; // Single char, simple and complex. var indices = [0x5, 0x60, 0x400, 0x680, 0x7ee, 0xFF02, 0x16610, 0x2f77b]; for (var lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) { for (var i = 0; i < indices.length; i++) { var index = indices[i]; var length = lengths[lengthIndex]; if (index + length > 0x7F) { length = 2 * length; } if (index + length > 0x7FF) { length = 3 * length; } if (index + length > 0xFFFF) { length = 4 * length; } var patternBufferUtf8 = allCharsBufferUtf8.slice(index, index + length); assert(index, allCharsBufferUtf8.includes(patternBufferUtf8)); var 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 (var lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) { for (var i = 0; i < indices.length; i++) { var index = indices[i] * 2; var length = lengths[lengthIndex]; var patternBufferUcs2 = allCharsBufferUcs2.slice(index, index + length); assert( index, allCharsBufferUcs2.includes(patternBufferUcs2, 0, 'ucs2')); var patternStringUcs2 = patternBufferUcs2.toString('ucs2'); assert( index, allCharsBufferUcs2.includes(patternStringUcs2, 0, 'ucs2')); } } assert.throws(function() { b.includes(function() { }); }); assert.throws(function() { b.includes({}); }); assert.throws(function() { b.includes([]); }); // test truncation of Number arguments to uint8 { var 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)); }
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