StringRefTest.cpp revision 160a3bf74d1a2b048f65e2162d038ed96eddde01 
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
57  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
58  EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
59  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
60  EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
61  EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
62  EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
63  EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
64  EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
65  EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
66  EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
67}
68
69TEST(StringRefTest, Operators) {
70  EXPECT_EQ("", StringRef());
71  EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
72  EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
73  EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
74  EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
75  EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
76  EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
77  EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
78  EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
79  EXPECT_EQ(StringRef("aab"), StringRef("aab"));
80  EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
81  EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
82  EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
83  EXPECT_EQ('a', StringRef("aab")[1]);
84}
85
86TEST(StringRefTest, Substr) {
87  StringRef Str("hello");
88  EXPECT_EQ("lo", Str.substr(3));
89  EXPECT_EQ("", Str.substr(100));
90  EXPECT_EQ("hello", Str.substr(0, 100));
91  EXPECT_EQ("o", Str.substr(4, 10));
92}
93
94TEST(StringRefTest, Slice) {
95  StringRef Str("hello");
96  EXPECT_EQ("l", Str.slice(2, 3));
97  EXPECT_EQ("ell", Str.slice(1, 4));
98  EXPECT_EQ("llo", Str.slice(2, 100));
99  EXPECT_EQ("", Str.slice(2, 1));
100  EXPECT_EQ("", Str.slice(10, 20));
101}
102
103TEST(StringRefTest, Split) {
104  StringRef Str("hello");
105  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
106            Str.split('X'));
107  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
108            Str.split('e'));
109  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
110            Str.split('h'));
111  EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
112            Str.split('l'));
113  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
114            Str.split('o'));
115
116  EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
117            Str.rsplit('X'));
118  EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
119            Str.rsplit('e'));
120  EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
121            Str.rsplit('h'));
122  EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
123            Str.rsplit('l'));
124  EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
125            Str.rsplit('o'));
126}
127
128TEST(StringRefTest, Split2) {
129  SmallVector<StringRef, 5> parts;
130  SmallVector<StringRef, 5> expected;
131
132  expected.push_back("ab"); expected.push_back("c");
133  StringRef(",ab,,c,").split(parts, ",", -1, false);
134  EXPECT_TRUE(parts == expected);
135
136  expected.clear(); parts.clear();
137  expected.push_back(""); expected.push_back("ab"); expected.push_back("");
138  expected.push_back("c"); expected.push_back("");
139  StringRef(",ab,,c,").split(parts, ",", -1, true);
140  EXPECT_TRUE(parts == expected);
141
142  expected.clear(); parts.clear();
143  expected.push_back("");
144  StringRef("").split(parts, ",", -1, true);
145  EXPECT_TRUE(parts == expected);
146
147  expected.clear(); parts.clear();
148  StringRef("").split(parts, ",", -1, false);
149  EXPECT_TRUE(parts == expected);
150
151  expected.clear(); parts.clear();
152  StringRef(",").split(parts, ",", -1, false);
153  EXPECT_TRUE(parts == expected);
154
155  expected.clear(); parts.clear();
156  expected.push_back(""); expected.push_back("");
157  StringRef(",").split(parts, ",", -1, true);
158  EXPECT_TRUE(parts == expected);
159
160  expected.clear(); parts.clear();
161  expected.push_back("a"); expected.push_back("b");
162  StringRef("a,b").split(parts, ",", -1, true);
163  EXPECT_TRUE(parts == expected);
164
165  // Test MaxSplit
166  expected.clear(); parts.clear();
167  expected.push_back("a,,b,c");
168  StringRef("a,,b,c").split(parts, ",", 0, true);
169  EXPECT_TRUE(parts == expected);
170
171  expected.clear(); parts.clear();
172  expected.push_back("a,,b,c");
173  StringRef("a,,b,c").split(parts, ",", 0, false);
174  EXPECT_TRUE(parts == expected);
175
176  expected.clear(); parts.clear();
177  expected.push_back("a"); expected.push_back(",b,c");
178  StringRef("a,,b,c").split(parts, ",", 1, true);
179  EXPECT_TRUE(parts == expected);
180
181  expected.clear(); parts.clear();
182  expected.push_back("a"); expected.push_back(",b,c");
183  StringRef("a,,b,c").split(parts, ",", 1, false);
184  EXPECT_TRUE(parts == expected);
185
186  expected.clear(); parts.clear();
187  expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
188  StringRef("a,,b,c").split(parts, ",", 2, true);
189  EXPECT_TRUE(parts == expected);
190
191  expected.clear(); parts.clear();
192  expected.push_back("a"); expected.push_back("b,c");
193  StringRef("a,,b,c").split(parts, ",", 2, false);
194  EXPECT_TRUE(parts == expected);
195
196  expected.clear(); parts.clear();
197  expected.push_back("a"); expected.push_back(""); expected.push_back("b");
198  expected.push_back("c");
199  StringRef("a,,b,c").split(parts, ",", 3, true);
200  EXPECT_TRUE(parts == expected);
201
202  expected.clear(); parts.clear();
203  expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
204  StringRef("a,,b,c").split(parts, ",", 3, false);
205  EXPECT_TRUE(parts == expected);
206}
207
208TEST(StringRefTest, StartsWith) {
209  StringRef Str("hello");
210  EXPECT_TRUE(Str.startswith("he"));
211  EXPECT_FALSE(Str.startswith("helloworld"));
212  EXPECT_FALSE(Str.startswith("hi"));
213}
214
215TEST(StringRefTest, EndsWith) {
216  StringRef Str("hello");
217  EXPECT_TRUE(Str.endswith("lo"));
218  EXPECT_FALSE(Str.endswith("helloworld"));
219  EXPECT_FALSE(Str.endswith("worldhello"));
220  EXPECT_FALSE(Str.endswith("so"));
221}
222
223TEST(StringRefTest, Find) {
224  StringRef Str("hello");
225  EXPECT_EQ(2U, Str.find('l'));
226  EXPECT_EQ(StringRef::npos, Str.find('z'));
227  EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
228  EXPECT_EQ(0U, Str.find("hello"));
229  EXPECT_EQ(1U, Str.find("ello"));
230  EXPECT_EQ(StringRef::npos, Str.find("zz"));
231  EXPECT_EQ(2U, Str.find("ll", 2));
232  EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
233
234  EXPECT_EQ(3U, Str.rfind('l'));
235  EXPECT_EQ(StringRef::npos, Str.rfind('z'));
236  EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
237  EXPECT_EQ(0U, Str.rfind("hello"));
238  EXPECT_EQ(1U, Str.rfind("ello"));
239  EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
240
241  EXPECT_EQ(2U, Str.find_first_of('l'));
242  EXPECT_EQ(1U, Str.find_first_of("el"));
243  EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
244
245  EXPECT_EQ(1U, Str.find_first_not_of('h'));
246  EXPECT_EQ(4U, Str.find_first_not_of("hel"));
247  EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
248}
249
250TEST(StringRefTest, Count) {
251  StringRef Str("hello");
252  EXPECT_EQ(2U, Str.count('l'));
253  EXPECT_EQ(1U, Str.count('o'));
254  EXPECT_EQ(0U, Str.count('z'));
255  EXPECT_EQ(0U, Str.count("helloworld"));
256  EXPECT_EQ(1U, Str.count("hello"));
257  EXPECT_EQ(1U, Str.count("ello"));
258  EXPECT_EQ(0U, Str.count("zz"));
259}
260
261TEST(StringRefTest, EditDistance) {
262  StringRef Str("hello");
263  EXPECT_EQ(2U, Str.edit_distance("hill"));
264}
265
266TEST(StringRefTest, Misc) {
267  std::string Storage;
268  raw_string_ostream OS(Storage);
269  OS << StringRef("hello");
270  EXPECT_EQ("hello", OS.str());
271}
272
273} // end anonymous namespace
274