StringRefTest.cpp revision 837bccd052ea930915173fc83e733c7d8187002d 
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;
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_lower("aAd"));
59  EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
60  EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
61  EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
62  EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
63  EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
64
65  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
66  EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
67  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
68  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
69  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
70  EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
71  EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
72  EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
73  EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
74  EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
75  EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
76}
77
78TEST(StringRefTest, Operators) {
79  EXPECT_EQ("", StringRef());
80  EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
81  EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
82  EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
83  EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
84  EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
85  EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
86  EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
87  EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
88  EXPECT_EQ(StringRef("aab"), StringRef("aab"));
89  EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
90  EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
91  EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
92  EXPECT_EQ('a', StringRef("aab")[1]);
93}
94
95TEST(StringRefTest, Substr) {
96  StringRef Str("hello");
97  EXPECT_EQ("lo", Str.substr(3));
98  EXPECT_EQ("", Str.substr(100));
99  EXPECT_EQ("hello", Str.substr(0, 100));
100  EXPECT_EQ("o", Str.substr(4, 10));
101}
102
103TEST(StringRefTest, Slice) {
104  StringRef Str("hello");
105  EXPECT_EQ("l", Str.slice(2, 3));
106  EXPECT_EQ("ell", Str.slice(1, 4));
107  EXPECT_EQ("llo", Str.slice(2, 100));
108  EXPECT_EQ("", Str.slice(2, 1));
109  EXPECT_EQ("", Str.slice(10, 20));
110}
111
112TEST(StringRefTest, Split) {
113  StringRef Str("hello");
114  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
115            Str.split('X'));
116  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
117            Str.split('e'));
118  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
119            Str.split('h'));
120  EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
121            Str.split('l'));
122  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
123            Str.split('o'));
124
125  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
126            Str.rsplit('X'));
127  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
128            Str.rsplit('e'));
129  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
130            Str.rsplit('h'));
131  EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
132            Str.rsplit('l'));
133  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
134            Str.rsplit('o'));
135}
136
137TEST(StringRefTest, Split2) {
138  SmallVector<StringRef, 5> parts;
139  SmallVector<StringRef, 5> expected;
140
141  expected.push_back("ab"); expected.push_back("c");
142  StringRef(",ab,,c,").split(parts, ",", -1, false);
143  EXPECT_TRUE(parts == expected);
144
145  expected.clear(); parts.clear();
146  expected.push_back(""); expected.push_back("ab"); expected.push_back("");
147  expected.push_back("c"); expected.push_back("");
148  StringRef(",ab,,c,").split(parts, ",", -1, true);
149  EXPECT_TRUE(parts == expected);
150
151  expected.clear(); parts.clear();
152  expected.push_back("");
153  StringRef("").split(parts, ",", -1, true);
154  EXPECT_TRUE(parts == expected);
155
156  expected.clear(); parts.clear();
157  StringRef("").split(parts, ",", -1, false);
158  EXPECT_TRUE(parts == expected);
159
160  expected.clear(); parts.clear();
161  StringRef(",").split(parts, ",", -1, false);
162  EXPECT_TRUE(parts == expected);
163
164  expected.clear(); parts.clear();
165  expected.push_back(""); expected.push_back("");
166  StringRef(",").split(parts, ",", -1, true);
167  EXPECT_TRUE(parts == expected);
168
169  expected.clear(); parts.clear();
170  expected.push_back("a"); expected.push_back("b");
171  StringRef("a,b").split(parts, ",", -1, true);
172  EXPECT_TRUE(parts == expected);
173
174  // Test MaxSplit
175  expected.clear(); parts.clear();
176  expected.push_back("a,,b,c");
177  StringRef("a,,b,c").split(parts, ",", 0, true);
178  EXPECT_TRUE(parts == expected);
179
180  expected.clear(); parts.clear();
181  expected.push_back("a,,b,c");
182  StringRef("a,,b,c").split(parts, ",", 0, false);
183  EXPECT_TRUE(parts == expected);
184
185  expected.clear(); parts.clear();
186  expected.push_back("a"); expected.push_back(",b,c");
187  StringRef("a,,b,c").split(parts, ",", 1, true);
188  EXPECT_TRUE(parts == expected);
189
190  expected.clear(); parts.clear();
191  expected.push_back("a"); expected.push_back(",b,c");
192  StringRef("a,,b,c").split(parts, ",", 1, false);
193  EXPECT_TRUE(parts == expected);
194
195  expected.clear(); parts.clear();
196  expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
197  StringRef("a,,b,c").split(parts, ",", 2, true);
198  EXPECT_TRUE(parts == expected);
199
200  expected.clear(); parts.clear();
201  expected.push_back("a"); expected.push_back("b,c");
202  StringRef("a,,b,c").split(parts, ",", 2, false);
203  EXPECT_TRUE(parts == expected);
204
205  expected.clear(); parts.clear();
206  expected.push_back("a"); expected.push_back(""); expected.push_back("b");
207  expected.push_back("c");
208  StringRef("a,,b,c").split(parts, ",", 3, true);
209  EXPECT_TRUE(parts == expected);
210
211  expected.clear(); parts.clear();
212  expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
213  StringRef("a,,b,c").split(parts, ",", 3, false);
214  EXPECT_TRUE(parts == expected);
215}
216
217TEST(StringRefTest, StartsWith) {
218  StringRef Str("hello");
219  EXPECT_TRUE(Str.startswith("he"));
220  EXPECT_FALSE(Str.startswith("helloworld"));
221  EXPECT_FALSE(Str.startswith("hi"));
222}
223
224TEST(StringRefTest, EndsWith) {
225  StringRef Str("hello");
226  EXPECT_TRUE(Str.endswith("lo"));
227  EXPECT_FALSE(Str.endswith("helloworld"));
228  EXPECT_FALSE(Str.endswith("worldhello"));
229  EXPECT_FALSE(Str.endswith("so"));
230}
231
232TEST(StringRefTest, Find) {
233  StringRef Str("hello");
234  EXPECT_EQ(2U, Str.find('l'));
235  EXPECT_EQ(StringRef::npos, Str.find('z'));
236  EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
237  EXPECT_EQ(0U, Str.find("hello"));
238  EXPECT_EQ(1U, Str.find("ello"));
239  EXPECT_EQ(StringRef::npos, Str.find("zz"));
240  EXPECT_EQ(2U, Str.find("ll", 2));
241  EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
242
243  EXPECT_EQ(3U, Str.rfind('l'));
244  EXPECT_EQ(StringRef::npos, Str.rfind('z'));
245  EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
246  EXPECT_EQ(0U, Str.rfind("hello"));
247  EXPECT_EQ(1U, Str.rfind("ello"));
248  EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
249
250  EXPECT_EQ(2U, Str.find_first_of('l'));
251  EXPECT_EQ(1U, Str.find_first_of("el"));
252  EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
253
254  EXPECT_EQ(1U, Str.find_first_not_of('h'));
255  EXPECT_EQ(4U, Str.find_first_not_of("hel"));
256  EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
257}
258
259TEST(StringRefTest, Count) {
260  StringRef Str("hello");
261  EXPECT_EQ(2U, Str.count('l'));
262  EXPECT_EQ(1U, Str.count('o'));
263  EXPECT_EQ(0U, Str.count('z'));
264  EXPECT_EQ(0U, Str.count("helloworld"));
265  EXPECT_EQ(1U, Str.count("hello"));
266  EXPECT_EQ(1U, Str.count("ello"));
267  EXPECT_EQ(0U, Str.count("zz"));
268}
269
270TEST(StringRefTest, EditDistance) {
271  StringRef Str("hello");
272  EXPECT_EQ(2U, Str.edit_distance("hill"));
273}
274
275TEST(StringRefTest, Misc) {
276  std::string Storage;
277  raw_string_ostream OS(Storage);
278  OS << StringRef("hello");
279  EXPECT_EQ("hello", OS.str());
280}
281
282} // end anonymous namespace
283