1 //===- llvm/unittest/Support/RegexTest.cpp - Regex tests --===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "gtest/gtest.h"
11 #include "llvm/Support/Regex.h"
12 #include "llvm/ADT/SmallVector.h"
13 #include <cstring>
14
15 using namespace llvm;
16 namespace {
17
18 class RegexTest : public ::testing::Test {
19 };
20
TEST_F(RegexTest,Basics)21 TEST_F(RegexTest, Basics) {
22 Regex r1("^[0-9]+$");
23 EXPECT_TRUE(r1.match("916"));
24 EXPECT_TRUE(r1.match("9"));
25 EXPECT_FALSE(r1.match("9a"));
26
27 SmallVector<StringRef, 1> Matches;
28 Regex r2("[0-9]+");
29 EXPECT_TRUE(r2.match("aa216b", &Matches));
30 EXPECT_EQ(1u, Matches.size());
31 EXPECT_EQ("216", Matches[0].str());
32
33 Regex r3("[0-9]+([a-f])?:([0-9]+)");
34 EXPECT_TRUE(r3.match("9a:513b", &Matches));
35 EXPECT_EQ(3u, Matches.size());
36 EXPECT_EQ("9a:513", Matches[0].str());
37 EXPECT_EQ("a", Matches[1].str());
38 EXPECT_EQ("513", Matches[2].str());
39
40 EXPECT_TRUE(r3.match("9:513b", &Matches));
41 EXPECT_EQ(3u, Matches.size());
42 EXPECT_EQ("9:513", Matches[0].str());
43 EXPECT_EQ("", Matches[1].str());
44 EXPECT_EQ("513", Matches[2].str());
45
46 Regex r4("a[^b]+b");
47 std::string String="axxb";
48 String[2] = '\0';
49 EXPECT_FALSE(r4.match("abb"));
50 EXPECT_TRUE(r4.match(String, &Matches));
51 EXPECT_EQ(1u, Matches.size());
52 EXPECT_EQ(String, Matches[0].str());
53
54
55 std::string NulPattern="X[0-9]+X([a-f])?:([0-9]+)";
56 String="YX99a:513b";
57 NulPattern[7] = '\0';
58 Regex r5(NulPattern);
59 EXPECT_FALSE(r5.match(String));
60 EXPECT_FALSE(r5.match("X9"));
61 String[3]='\0';
62 EXPECT_TRUE(r5.match(String));
63 }
64
TEST_F(RegexTest,Substitution)65 TEST_F(RegexTest, Substitution) {
66 std::string Error;
67
68 EXPECT_EQ("aNUMber", Regex("[0-9]+").sub("NUM", "a1234ber"));
69
70 // Standard Escapes
71 EXPECT_EQ("a\\ber", Regex("[0-9]+").sub("\\\\", "a1234ber", &Error));
72 EXPECT_EQ(Error, "");
73 EXPECT_EQ("a\nber", Regex("[0-9]+").sub("\\n", "a1234ber", &Error));
74 EXPECT_EQ(Error, "");
75 EXPECT_EQ("a\tber", Regex("[0-9]+").sub("\\t", "a1234ber", &Error));
76 EXPECT_EQ(Error, "");
77 EXPECT_EQ("ajber", Regex("[0-9]+").sub("\\j", "a1234ber", &Error));
78 EXPECT_EQ(Error, "");
79
80 EXPECT_EQ("aber", Regex("[0-9]+").sub("\\", "a1234ber", &Error));
81 EXPECT_EQ(Error, "replacement string contained trailing backslash");
82
83 // Backreferences
84 EXPECT_EQ("aa1234bber", Regex("a[0-9]+b").sub("a\\0b", "a1234ber", &Error));
85 EXPECT_EQ(Error, "");
86
87 EXPECT_EQ("a1234ber", Regex("a([0-9]+)b").sub("a\\1b", "a1234ber", &Error));
88 EXPECT_EQ(Error, "");
89
90 EXPECT_EQ("aber", Regex("a[0-9]+b").sub("a\\100b", "a1234ber", &Error));
91 EXPECT_EQ(Error, "invalid backreference string '100'");
92 }
93
94 }
95