StringRefTest.cpp revision 437ef0cfb74102208d6e96ff7e7f1204835e66f3 
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/SmallVector.h"
13#include "llvm/Support/raw_ostream.h"
14using namespace llvm;
15
16namespace llvm {
17
18std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
19  OS << S.str();
20  return OS;
21}
22
23std::ostream &operator<<(std::ostream &OS,
24                         const std::pair<StringRef, StringRef> &P) {
25  OS << "(" << P.first << ", " << P.second << ")";
26  return OS;
27}
28
29}
30
31namespace {
32TEST(StringRefTest, Construction) {
33  EXPECT_EQ("", StringRef());
34  EXPECT_EQ("hello", StringRef("hello"));
35  EXPECT_EQ("hello", StringRef("hello world", 5));
36  EXPECT_EQ("hello", StringRef(std::string("hello")));
37}
38
39TEST(StringRefTest, Iteration) {
40  StringRef S("hello");
41  const char *p = "hello";
42  for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
43    EXPECT_EQ(*it, *p);
44}
45
46TEST(StringRefTest, StringOps) {
47  const char *p = "hello";
48  EXPECT_EQ(p, StringRef(p, 0).data());
49  EXPECT_TRUE(StringRef().empty());
50  EXPECT_EQ((size_t) 5, StringRef("hello").size());
51  EXPECT_EQ(-1, StringRef("aab").compare("aad"));
52  EXPECT_EQ( 0, StringRef("aab").compare("aab"));
53  EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
54  EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
55  EXPECT_EQ( 1, StringRef("aab").compare("aa"));
56  EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));
57
58  EXPECT_EQ(-1, StringRef("aab").compare("aad", 3));
59  EXPECT_EQ( 0, StringRef("aab").compare("aab", 3));
60  EXPECT_EQ( 1, StringRef("aab").compare("aaa", 3));
61  EXPECT_EQ(-1, StringRef("aab").compare("aabb", 4));
62  EXPECT_EQ( 1, StringRef("aab").compare("aa", 3));
63  EXPECT_EQ( 1, StringRef("\xFF").compare("\1", 3));
64  EXPECT_EQ( 0, StringRef("aab").compare("aad", 2));
65  EXPECT_EQ( 0, StringRef("aab").compare("aab", 2));
66  EXPECT_EQ( 0, StringRef("aab").compare("aab", 4));
67  EXPECT_EQ( 0, StringRef("aab").compare("aaa", 2));
68  EXPECT_EQ( 0, StringRef("aab").compare("aabb", 3));
69  EXPECT_EQ( 0, StringRef("aab").compare("aa", 2));
70
71  EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
72  EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
73  EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
74  EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
75  EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
76  EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
77
78  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
79  EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
80  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
81  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
82  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
83  EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
84  EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
85  EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
86  EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
87  EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
88  EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
89}
90
91TEST(StringRefTest, Operators) {
92  EXPECT_EQ("", StringRef());
93  EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
94  EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
95  EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
96  EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
97  EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
98  EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
99  EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
100  EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
101  EXPECT_EQ(StringRef("aab"), StringRef("aab"));
102  EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
103  EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
104  EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
105  EXPECT_EQ('a', StringRef("aab")[1]);
106}
107
108TEST(StringRefTest, Substr) {
109  StringRef Str("hello");
110  EXPECT_EQ("lo", Str.substr(3));
111  EXPECT_EQ("", Str.substr(100));
112  EXPECT_EQ("hello", Str.substr(0, 100));
113  EXPECT_EQ("o", Str.substr(4, 10));
114}
115
116TEST(StringRefTest, Slice) {
117  StringRef Str("hello");
118  EXPECT_EQ("l", Str.slice(2, 3));
119  EXPECT_EQ("ell", Str.slice(1, 4));
120  EXPECT_EQ("llo", Str.slice(2, 100));
121  EXPECT_EQ("", Str.slice(2, 1));
122  EXPECT_EQ("", Str.slice(10, 20));
123}
124
125TEST(StringRefTest, Split) {
126  StringRef Str("hello");
127  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
128            Str.split('X'));
129  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
130            Str.split('e'));
131  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
132            Str.split('h'));
133  EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
134            Str.split('l'));
135  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
136            Str.split('o'));
137
138  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
139            Str.rsplit('X'));
140  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
141            Str.rsplit('e'));
142  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
143            Str.rsplit('h'));
144  EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
145            Str.rsplit('l'));
146  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
147            Str.rsplit('o'));
148}
149
150TEST(StringRefTest, Split2) {
151  SmallVector<StringRef, 5> parts;
152  SmallVector<StringRef, 5> expected;
153
154  expected.push_back("ab"); expected.push_back("c");
155  StringRef(",ab,,c,").split(parts, ",", -1, false);
156  EXPECT_TRUE(parts == expected);
157
158  expected.clear(); parts.clear();
159  expected.push_back(""); expected.push_back("ab"); expected.push_back("");
160  expected.push_back("c"); expected.push_back("");
161  StringRef(",ab,,c,").split(parts, ",", -1, true);
162  EXPECT_TRUE(parts == expected);
163
164  expected.clear(); parts.clear();
165  expected.push_back("");
166  StringRef("").split(parts, ",", -1, true);
167  EXPECT_TRUE(parts == expected);
168
169  expected.clear(); parts.clear();
170  StringRef("").split(parts, ",", -1, false);
171  EXPECT_TRUE(parts == expected);
172
173  expected.clear(); parts.clear();
174  StringRef(",").split(parts, ",", -1, false);
175  EXPECT_TRUE(parts == expected);
176
177  expected.clear(); parts.clear();
178  expected.push_back(""); expected.push_back("");
179  StringRef(",").split(parts, ",", -1, true);
180  EXPECT_TRUE(parts == expected);
181
182  expected.clear(); parts.clear();
183  expected.push_back("a"); expected.push_back("b");
184  StringRef("a,b").split(parts, ",", -1, true);
185  EXPECT_TRUE(parts == expected);
186
187  // Test MaxSplit
188  expected.clear(); parts.clear();
189  expected.push_back("a,,b,c");
190  StringRef("a,,b,c").split(parts, ",", 0, true);
191  EXPECT_TRUE(parts == expected);
192
193  expected.clear(); parts.clear();
194  expected.push_back("a,,b,c");
195  StringRef("a,,b,c").split(parts, ",", 0, false);
196  EXPECT_TRUE(parts == expected);
197
198  expected.clear(); parts.clear();
199  expected.push_back("a"); expected.push_back(",b,c");
200  StringRef("a,,b,c").split(parts, ",", 1, true);
201  EXPECT_TRUE(parts == expected);
202
203  expected.clear(); parts.clear();
204  expected.push_back("a"); expected.push_back(",b,c");
205  StringRef("a,,b,c").split(parts, ",", 1, false);
206  EXPECT_TRUE(parts == expected);
207
208  expected.clear(); parts.clear();
209  expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
210  StringRef("a,,b,c").split(parts, ",", 2, true);
211  EXPECT_TRUE(parts == expected);
212
213  expected.clear(); parts.clear();
214  expected.push_back("a"); expected.push_back("b,c");
215  StringRef("a,,b,c").split(parts, ",", 2, false);
216  EXPECT_TRUE(parts == expected);
217
218  expected.clear(); parts.clear();
219  expected.push_back("a"); expected.push_back(""); expected.push_back("b");
220  expected.push_back("c");
221  StringRef("a,,b,c").split(parts, ",", 3, true);
222  EXPECT_TRUE(parts == expected);
223
224  expected.clear(); parts.clear();
225  expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
226  StringRef("a,,b,c").split(parts, ",", 3, false);
227  EXPECT_TRUE(parts == expected);
228}
229
230TEST(StringRefTest, StartsWith) {
231  StringRef Str("hello");
232  EXPECT_TRUE(Str.startswith("he"));
233  EXPECT_FALSE(Str.startswith("helloworld"));
234  EXPECT_FALSE(Str.startswith("hi"));
235}
236
237TEST(StringRefTest, EndsWith) {
238  StringRef Str("hello");
239  EXPECT_TRUE(Str.endswith("lo"));
240  EXPECT_FALSE(Str.endswith("helloworld"));
241  EXPECT_FALSE(Str.endswith("worldhello"));
242  EXPECT_FALSE(Str.endswith("so"));
243}
244
245TEST(StringRefTest, Find) {
246  StringRef Str("hello");
247  EXPECT_EQ(2U, Str.find('l'));
248  EXPECT_EQ(StringRef::npos, Str.find('z'));
249  EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
250  EXPECT_EQ(0U, Str.find("hello"));
251  EXPECT_EQ(1U, Str.find("ello"));
252  EXPECT_EQ(StringRef::npos, Str.find("zz"));
253  EXPECT_EQ(2U, Str.find("ll", 2));
254  EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
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
295} // end anonymous namespace
296