StringRefTest.cpp revision 528f0bbe19553dfadedca040df13a389daa7593d 
1//===- llvm/unittest/ADT/StringRefTest.cpp - StringRef unit 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/ADT/StringRef.h"
12#include "llvm/ADT/Hashing.h"
13#include "llvm/ADT/SmallVector.h"
14#include "llvm/Support/raw_ostream.h"
15using namespace llvm;
16
17namespace llvm {
18
19std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
20  OS << S.str();
21  return OS;
22}
23
24std::ostream &operator<<(std::ostream &OS,
25                         const std::pair<StringRef, StringRef> &P) {
26  OS << "(" << P.first << ", " << P.second << ")";
27  return OS;
28}
29
30}
31
32namespace {
33TEST(StringRefTest, Construction) {
34  EXPECT_EQ("", StringRef());
35  EXPECT_EQ("hello", StringRef("hello"));
36  EXPECT_EQ("hello", StringRef("hello world", 5));
37  EXPECT_EQ("hello", StringRef(std::string("hello")));
38}
39
40TEST(StringRefTest, Iteration) {
41  StringRef S("hello");
42  const char *p = "hello";
43  for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
44    EXPECT_EQ(*it, *p);
45}
46
47TEST(StringRefTest, StringOps) {
48  const char *p = "hello";
49  EXPECT_EQ(p, StringRef(p, 0).data());
50  EXPECT_TRUE(StringRef().empty());
51  EXPECT_EQ((size_t) 5, StringRef("hello").size());
52  EXPECT_EQ(-1, StringRef("aab").compare("aad"));
53  EXPECT_EQ( 0, StringRef("aab").compare("aab"));
54  EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
55  EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
56  EXPECT_EQ( 1, StringRef("aab").compare("aa"));
57  EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));
58
59  EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
60  EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
61  EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
62  EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
63  EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
64  EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
65
66  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
67  EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
68  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
69  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
70  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
71  EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
72  EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
73  EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
74  EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
75  EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
76  EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
77  EXPECT_EQ( 1, StringRef("V16").compare_numeric("V1_q0"));
78  EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V16"));
79  EXPECT_EQ(-1, StringRef("V8_q0").compare_numeric("V16"));
80  EXPECT_EQ( 1, StringRef("V16").compare_numeric("V8_q0"));
81  EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V8_q0"));
82  EXPECT_EQ( 1, StringRef("V8_q0").compare_numeric("V1_q0"));
83}
84
85TEST(StringRefTest, Operators) {
86  EXPECT_EQ("", StringRef());
87  EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
88  EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
89  EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
90  EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
91  EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
92  EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
93  EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
94  EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
95  EXPECT_EQ(StringRef("aab"), StringRef("aab"));
96  EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
97  EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
98  EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
99  EXPECT_EQ('a', StringRef("aab")[1]);
100}
101
102TEST(StringRefTest, Substr) {
103  StringRef Str("hello");
104  EXPECT_EQ("lo", Str.substr(3));
105  EXPECT_EQ("", Str.substr(100));
106  EXPECT_EQ("hello", Str.substr(0, 100));
107  EXPECT_EQ("o", Str.substr(4, 10));
108}
109
110TEST(StringRefTest, Slice) {
111  StringRef Str("hello");
112  EXPECT_EQ("l", Str.slice(2, 3));
113  EXPECT_EQ("ell", Str.slice(1, 4));
114  EXPECT_EQ("llo", Str.slice(2, 100));
115  EXPECT_EQ("", Str.slice(2, 1));
116  EXPECT_EQ("", Str.slice(10, 20));
117}
118
119TEST(StringRefTest, Split) {
120  StringRef Str("hello");
121  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
122            Str.split('X'));
123  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
124            Str.split('e'));
125  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
126            Str.split('h'));
127  EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
128            Str.split('l'));
129  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
130            Str.split('o'));
131
132  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
133            Str.rsplit('X'));
134  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
135            Str.rsplit('e'));
136  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
137            Str.rsplit('h'));
138  EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
139            Str.rsplit('l'));
140  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
141            Str.rsplit('o'));
142}
143
144TEST(StringRefTest, Split2) {
145  SmallVector<StringRef, 5> parts;
146  SmallVector<StringRef, 5> expected;
147
148  expected.push_back("ab"); expected.push_back("c");
149  StringRef(",ab,,c,").split(parts, ",", -1, false);
150  EXPECT_TRUE(parts == expected);
151
152  expected.clear(); parts.clear();
153  expected.push_back(""); expected.push_back("ab"); expected.push_back("");
154  expected.push_back("c"); expected.push_back("");
155  StringRef(",ab,,c,").split(parts, ",", -1, true);
156  EXPECT_TRUE(parts == expected);
157
158  expected.clear(); parts.clear();
159  expected.push_back("");
160  StringRef("").split(parts, ",", -1, true);
161  EXPECT_TRUE(parts == expected);
162
163  expected.clear(); parts.clear();
164  StringRef("").split(parts, ",", -1, false);
165  EXPECT_TRUE(parts == expected);
166
167  expected.clear(); parts.clear();
168  StringRef(",").split(parts, ",", -1, false);
169  EXPECT_TRUE(parts == expected);
170
171  expected.clear(); parts.clear();
172  expected.push_back(""); expected.push_back("");
173  StringRef(",").split(parts, ",", -1, true);
174  EXPECT_TRUE(parts == expected);
175
176  expected.clear(); parts.clear();
177  expected.push_back("a"); expected.push_back("b");
178  StringRef("a,b").split(parts, ",", -1, true);
179  EXPECT_TRUE(parts == expected);
180
181  // Test MaxSplit
182  expected.clear(); parts.clear();
183  expected.push_back("a,,b,c");
184  StringRef("a,,b,c").split(parts, ",", 0, true);
185  EXPECT_TRUE(parts == expected);
186
187  expected.clear(); parts.clear();
188  expected.push_back("a,,b,c");
189  StringRef("a,,b,c").split(parts, ",", 0, false);
190  EXPECT_TRUE(parts == expected);
191
192  expected.clear(); parts.clear();
193  expected.push_back("a"); expected.push_back(",b,c");
194  StringRef("a,,b,c").split(parts, ",", 1, true);
195  EXPECT_TRUE(parts == expected);
196
197  expected.clear(); parts.clear();
198  expected.push_back("a"); expected.push_back(",b,c");
199  StringRef("a,,b,c").split(parts, ",", 1, false);
200  EXPECT_TRUE(parts == expected);
201
202  expected.clear(); parts.clear();
203  expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
204  StringRef("a,,b,c").split(parts, ",", 2, true);
205  EXPECT_TRUE(parts == expected);
206
207  expected.clear(); parts.clear();
208  expected.push_back("a"); expected.push_back("b,c");
209  StringRef("a,,b,c").split(parts, ",", 2, false);
210  EXPECT_TRUE(parts == expected);
211
212  expected.clear(); parts.clear();
213  expected.push_back("a"); expected.push_back(""); expected.push_back("b");
214  expected.push_back("c");
215  StringRef("a,,b,c").split(parts, ",", 3, true);
216  EXPECT_TRUE(parts == expected);
217
218  expected.clear(); parts.clear();
219  expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
220  StringRef("a,,b,c").split(parts, ",", 3, false);
221  EXPECT_TRUE(parts == expected);
222}
223
224TEST(StringRefTest, StartsWith) {
225  StringRef Str("hello");
226  EXPECT_TRUE(Str.startswith("he"));
227  EXPECT_FALSE(Str.startswith("helloworld"));
228  EXPECT_FALSE(Str.startswith("hi"));
229}
230
231TEST(StringRefTest, EndsWith) {
232  StringRef Str("hello");
233  EXPECT_TRUE(Str.endswith("lo"));
234  EXPECT_FALSE(Str.endswith("helloworld"));
235  EXPECT_FALSE(Str.endswith("worldhello"));
236  EXPECT_FALSE(Str.endswith("so"));
237}
238
239TEST(StringRefTest, Find) {
240  StringRef Str("hello");
241  EXPECT_EQ(2U, Str.find('l'));
242  EXPECT_EQ(StringRef::npos, Str.find('z'));
243  EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
244  EXPECT_EQ(0U, Str.find("hello"));
245  EXPECT_EQ(1U, Str.find("ello"));
246  EXPECT_EQ(StringRef::npos, Str.find("zz"));
247  EXPECT_EQ(2U, Str.find("ll", 2));
248  EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
249  EXPECT_EQ(0U, Str.find(""));
250  StringRef LongStr("hellx xello hell ello world foo bar hello");
251  EXPECT_EQ(36U, LongStr.find("hello"));
252  EXPECT_EQ(28U, LongStr.find("foo"));
253  EXPECT_EQ(12U, LongStr.find("hell", 2));
254  EXPECT_EQ(0U, LongStr.find(""));
255
256  EXPECT_EQ(3U, Str.rfind('l'));
257  EXPECT_EQ(StringRef::npos, Str.rfind('z'));
258  EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
259  EXPECT_EQ(0U, Str.rfind("hello"));
260  EXPECT_EQ(1U, Str.rfind("ello"));
261  EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
262
263  EXPECT_EQ(2U, Str.find_first_of('l'));
264  EXPECT_EQ(1U, Str.find_first_of("el"));
265  EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
266
267  EXPECT_EQ(1U, Str.find_first_not_of('h'));
268  EXPECT_EQ(4U, Str.find_first_not_of("hel"));
269  EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
270}
271
272TEST(StringRefTest, Count) {
273  StringRef Str("hello");
274  EXPECT_EQ(2U, Str.count('l'));
275  EXPECT_EQ(1U, Str.count('o'));
276  EXPECT_EQ(0U, Str.count('z'));
277  EXPECT_EQ(0U, Str.count("helloworld"));
278  EXPECT_EQ(1U, Str.count("hello"));
279  EXPECT_EQ(1U, Str.count("ello"));
280  EXPECT_EQ(0U, Str.count("zz"));
281}
282
283TEST(StringRefTest, EditDistance) {
284  StringRef Str("hello");
285  EXPECT_EQ(2U, Str.edit_distance("hill"));
286}
287
288TEST(StringRefTest, Misc) {
289  std::string Storage;
290  raw_string_ostream OS(Storage);
291  OS << StringRef("hello");
292  EXPECT_EQ("hello", OS.str());
293}
294
295TEST(StringRefTest, Hashing) {
296  EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
297  EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
298  std::string S = "hello world";
299  hash_code H = hash_value(S);
300  EXPECT_EQ(H, hash_value(StringRef("hello world")));
301  EXPECT_EQ(H, hash_value(StringRef(S)));
302  EXPECT_NE(H, hash_value(StringRef("hello worl")));
303  EXPECT_EQ(hash_value(std::string("hello worl")),
304            hash_value(StringRef("hello worl")));
305  EXPECT_NE(H, hash_value(StringRef("hello world ")));
306  EXPECT_EQ(hash_value(std::string("hello world ")),
307            hash_value(StringRef("hello world ")));
308  EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
309  EXPECT_NE(hash_value(std::string("ello worl")),
310            hash_value(StringRef("hello world").slice(1, -1)));
311}
312
313} // end anonymous namespace
314