|
| 1 | +/* |
| 2 | + * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | + * All rights reserved. |
| 4 | + * |
| 5 | + * This source code is licensed under the BSD-style license found in the |
| 6 | + * LICENSE file in the root directory of this source tree. |
| 7 | + */ |
| 8 | + |
| 9 | +#include <gtest/gtest.h> |
| 10 | + |
| 11 | +#include "pytorch/tokenizers/pcre2_regex.h" |
| 12 | +#include "pytorch/tokenizers/re2_regex.h" |
| 13 | +#include "pytorch/tokenizers/regex.h" |
| 14 | + |
| 15 | +using namespace tokenizers; |
| 16 | + |
| 17 | +class RegexTest : public ::testing::Test {}; |
| 18 | + |
| 19 | +// Test basic functionality |
| 20 | +TEST_F(RegexTest, BasicMatching) { |
| 21 | + auto regex = TK_UNWRAP_THROW(create_regex("\\w+")); |
| 22 | + |
| 23 | + std::string text = "Hello world"; |
| 24 | + auto matches = regex->find_all(text); |
| 25 | + ASSERT_EQ(matches.size(), 2); |
| 26 | + EXPECT_EQ(matches[0].start, 0); |
| 27 | + EXPECT_EQ(matches[0].end, 5); |
| 28 | + EXPECT_EQ( |
| 29 | + text.substr(matches[0].start, matches[0].end - matches[0].start), |
| 30 | + "Hello"); |
| 31 | + EXPECT_EQ(matches[1].start, 6); |
| 32 | + EXPECT_EQ(matches[1].end, 11); |
| 33 | + EXPECT_EQ( |
| 34 | + text.substr(matches[1].start, matches[1].end - matches[1].start), |
| 35 | + "world"); |
| 36 | +} |
| 37 | + |
| 38 | +// Test pattern that only PCRE2 supports (lookbehind) |
| 39 | +TEST_F(RegexTest, Pcre2Specific) { |
| 40 | + const std::string pattern = "(?<=@)\\w+"; |
| 41 | + |
| 42 | + // Verify that the factory function fallsback on a PCRE2 regex |
| 43 | + auto regex = TK_UNWRAP_THROW(create_regex(pattern)); |
| 44 | + EXPECT_NE( dynamic_cast<Pcre2Regex*>(regex. get()), nullptr); |
| 45 | + |
| 46 | + std::string text = "[email protected]"; |
| 47 | + auto matches = regex->find_all(text); |
| 48 | + ASSERT_EQ(matches.size(), 1); |
| 49 | + EXPECT_EQ(matches[0].start, 5); |
| 50 | + EXPECT_EQ(matches[0].end, 12); |
| 51 | + EXPECT_EQ( |
| 52 | + text.substr(matches[0].start, matches[0].end - matches[0].start), |
| 53 | + "example"); |
| 54 | +} |
| 55 | + |
| 56 | +// Test complex pattern with negative lookahead that should fall back to PCRE2. |
| 57 | +// This specific pattern is from the Qwen2.5 1.5B pretokenizer. |
| 58 | +// https://huggingface.co/Qwen/Qwen2.5-1.5B/raw/main/tokenizer.json |
| 59 | +TEST_F(RegexTest, ComplexPatternWithNegativeLookahead) { |
| 60 | + const std::string complex_pattern = |
| 61 | + "(?i:'s|'t|'re|'ve|'m|'ll|'d)|[^\\r\\n\\p{L}\\p{N}]?\\p{L}+|\\p{N}| ?[^\\s\\p{L}\\p{N}]+[\\r\\n]*|\\s*[\\r\\n]+|\\s+(?!\\S)|\\s+"; |
| 62 | + |
| 63 | + // Now verify that the factory function fallsback on a PCRE2 regex |
| 64 | + auto regex = TK_UNWRAP_THROW(create_regex(complex_pattern)); |
| 65 | + EXPECT_NE( dynamic_cast<Pcre2Regex*>(regex. get()), nullptr); |
| 66 | + |
| 67 | + // Test the pattern with some sample text |
| 68 | + std::string text = "Hello's world\n test"; |
| 69 | + auto matches = regex->find_all(text); |
| 70 | + |
| 71 | + // We expect to match: |
| 72 | + // 1. "Hello" (word) |
| 73 | + // 2. "'s" (contraction) |
| 74 | + // 3. " world" (word with leading space) |
| 75 | + // 4. "\n" (newline) |
| 76 | + // 5. " " (whitespace) |
| 77 | + // 6. " test" (word with leading space) |
| 78 | + ASSERT_EQ(matches.size(), 6); |
| 79 | + |
| 80 | + EXPECT_EQ(matches[0].start, 0); |
| 81 | + EXPECT_EQ(matches[0].end, 5); |
| 82 | + EXPECT_EQ( |
| 83 | + text.substr(matches[0].start, matches[0].end - matches[0].start), |
| 84 | + "Hello"); |
| 85 | + EXPECT_EQ(matches[1].start, 5); |
| 86 | + EXPECT_EQ(matches[1].end, 7); |
| 87 | + EXPECT_EQ( |
| 88 | + text.substr(matches[1].start, matches[1].end - matches[1].start), "'s"); |
| 89 | + EXPECT_EQ(matches[2].start, 7); |
| 90 | + EXPECT_EQ(matches[2].end, 13); |
| 91 | + EXPECT_EQ( |
| 92 | + text.substr(matches[2].start, matches[2].end - matches[2].start), |
| 93 | + " world"); |
| 94 | + EXPECT_EQ(matches[3].start, 13); |
| 95 | + EXPECT_EQ(matches[3].end, 14); |
| 96 | + EXPECT_EQ( |
| 97 | + text.substr(matches[3].start, matches[3].end - matches[3].start), "\n"); |
| 98 | + EXPECT_EQ(matches[4].start, 14); |
| 99 | + EXPECT_EQ(matches[4].end, 15); |
| 100 | + EXPECT_EQ( |
| 101 | + text.substr(matches[4].start, matches[4].end - matches[4].start), " "); |
| 102 | + EXPECT_EQ(matches[5].start, 15); |
| 103 | + EXPECT_EQ(matches[5].end, 20); |
| 104 | + EXPECT_EQ( |
| 105 | + text.substr(matches[5].start, matches[5].end - matches[5].start), |
| 106 | + " test"); |
| 107 | +} |
0 commit comments