1 //===- llvm/unittest/ADT/SmallStringTest.cpp ------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // SmallString unit tests.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "llvm/ADT/SmallString.h"
14 #include "gtest/gtest.h"
15 #include <climits>
16 #include <cstring>
17 #include <stdarg.h>
18 
19 using namespace llvm;
20 
21 namespace {
22 
23 // Test fixture class
24 class SmallStringTest : public testing::Test {
25 protected:
26   typedef SmallString<40> StringType;
27 
28   StringType theString;
29 
assertEmpty(StringType & v)30   void assertEmpty(StringType & v) {
31     // Size tests
32     EXPECT_EQ(0u, v.size());
33     EXPECT_TRUE(v.empty());
34     // Iterator tests
35     EXPECT_TRUE(v.begin() == v.end());
36   }
37 };
38 
39 // New string test.
TEST_F(SmallStringTest,EmptyStringTest)40 TEST_F(SmallStringTest, EmptyStringTest) {
41   SCOPED_TRACE("EmptyStringTest");
42   assertEmpty(theString);
43   EXPECT_TRUE(theString.rbegin() == theString.rend());
44 }
45 
TEST_F(SmallStringTest,AssignRepeated)46 TEST_F(SmallStringTest, AssignRepeated) {
47   theString.assign(3, 'a');
48   EXPECT_EQ(3u, theString.size());
49   EXPECT_STREQ("aaa", theString.c_str());
50 }
51 
TEST_F(SmallStringTest,AssignIterPair)52 TEST_F(SmallStringTest, AssignIterPair) {
53   StringRef abc = "abc";
54   theString.assign(abc.begin(), abc.end());
55   EXPECT_EQ(3u, theString.size());
56   EXPECT_STREQ("abc", theString.c_str());
57 }
58 
TEST_F(SmallStringTest,AssignStringRef)59 TEST_F(SmallStringTest, AssignStringRef) {
60   StringRef abc = "abc";
61   theString.assign(abc);
62   EXPECT_EQ(3u, theString.size());
63   EXPECT_STREQ("abc", theString.c_str());
64 }
65 
TEST_F(SmallStringTest,AssignSmallVector)66 TEST_F(SmallStringTest, AssignSmallVector) {
67   StringRef abc = "abc";
68   SmallVector<char, 10> abcVec(abc.begin(), abc.end());
69   theString.assign(abcVec);
70   EXPECT_EQ(3u, theString.size());
71   EXPECT_STREQ("abc", theString.c_str());
72 }
73 
TEST_F(SmallStringTest,AppendIterPair)74 TEST_F(SmallStringTest, AppendIterPair) {
75   StringRef abc = "abc";
76   theString.append(abc.begin(), abc.end());
77   theString.append(abc.begin(), abc.end());
78   EXPECT_EQ(6u, theString.size());
79   EXPECT_STREQ("abcabc", theString.c_str());
80 }
81 
TEST_F(SmallStringTest,AppendStringRef)82 TEST_F(SmallStringTest, AppendStringRef) {
83   StringRef abc = "abc";
84   theString.append(abc);
85   theString.append(abc);
86   EXPECT_EQ(6u, theString.size());
87   EXPECT_STREQ("abcabc", theString.c_str());
88 }
89 
TEST_F(SmallStringTest,AppendSmallVector)90 TEST_F(SmallStringTest, AppendSmallVector) {
91   StringRef abc = "abc";
92   SmallVector<char, 10> abcVec(abc.begin(), abc.end());
93   theString.append(abcVec);
94   theString.append(abcVec);
95   EXPECT_EQ(6u, theString.size());
96   EXPECT_STREQ("abcabc", theString.c_str());
97 }
98 
TEST_F(SmallStringTest,Substr)99 TEST_F(SmallStringTest, Substr) {
100   theString = "hello";
101   EXPECT_EQ("lo", theString.substr(3));
102   EXPECT_EQ("", theString.substr(100));
103   EXPECT_EQ("hello", theString.substr(0, 100));
104   EXPECT_EQ("o", theString.substr(4, 10));
105 }
106 
TEST_F(SmallStringTest,Slice)107 TEST_F(SmallStringTest, Slice) {
108   theString = "hello";
109   EXPECT_EQ("l", theString.slice(2, 3));
110   EXPECT_EQ("ell", theString.slice(1, 4));
111   EXPECT_EQ("llo", theString.slice(2, 100));
112   EXPECT_EQ("", theString.slice(2, 1));
113   EXPECT_EQ("", theString.slice(10, 20));
114 }
115 
TEST_F(SmallStringTest,Find)116 TEST_F(SmallStringTest, Find) {
117   theString = "hello";
118   EXPECT_EQ(2U, theString.find('l'));
119   EXPECT_EQ(StringRef::npos, theString.find('z'));
120   EXPECT_EQ(StringRef::npos, theString.find("helloworld"));
121   EXPECT_EQ(0U, theString.find("hello"));
122   EXPECT_EQ(1U, theString.find("ello"));
123   EXPECT_EQ(StringRef::npos, theString.find("zz"));
124   EXPECT_EQ(2U, theString.find("ll", 2));
125   EXPECT_EQ(StringRef::npos, theString.find("ll", 3));
126   EXPECT_EQ(0U, theString.find(""));
127 
128   EXPECT_EQ(3U, theString.rfind('l'));
129   EXPECT_EQ(StringRef::npos, theString.rfind('z'));
130   EXPECT_EQ(StringRef::npos, theString.rfind("helloworld"));
131   EXPECT_EQ(0U, theString.rfind("hello"));
132   EXPECT_EQ(1U, theString.rfind("ello"));
133   EXPECT_EQ(StringRef::npos, theString.rfind("zz"));
134 
135   EXPECT_EQ(2U, theString.find_first_of('l'));
136   EXPECT_EQ(1U, theString.find_first_of("el"));
137   EXPECT_EQ(StringRef::npos, theString.find_first_of("xyz"));
138 
139   EXPECT_EQ(1U, theString.find_first_not_of('h'));
140   EXPECT_EQ(4U, theString.find_first_not_of("hel"));
141   EXPECT_EQ(StringRef::npos, theString.find_first_not_of("hello"));
142 
143   theString = "hellx xello hell ello world foo bar hello";
144   EXPECT_EQ(36U, theString.find("hello"));
145   EXPECT_EQ(28U, theString.find("foo"));
146   EXPECT_EQ(12U, theString.find("hell", 2));
147   EXPECT_EQ(0U, theString.find(""));
148 }
149 
TEST_F(SmallStringTest,Count)150 TEST_F(SmallStringTest, Count) {
151   theString = "hello";
152   EXPECT_EQ(2U, theString.count('l'));
153   EXPECT_EQ(1U, theString.count('o'));
154   EXPECT_EQ(0U, theString.count('z'));
155   EXPECT_EQ(0U, theString.count("helloworld"));
156   EXPECT_EQ(1U, theString.count("hello"));
157   EXPECT_EQ(1U, theString.count("ello"));
158   EXPECT_EQ(0U, theString.count("zz"));
159 }
160 
TEST_F(SmallStringTest,Realloc)161 TEST_F(SmallStringTest, Realloc) {
162   theString = "abcd";
163   theString.reserve(100);
164   EXPECT_EQ("abcd", theString);
165   unsigned const N = 100000;
166   theString.reserve(N);
167   for (unsigned i = 0; i < N - 4; ++i)
168     theString.push_back('y');
169   EXPECT_EQ("abcdyyy", theString.slice(0, 7));
170 }
171 
TEST(StringRefTest,Comparisons)172 TEST(StringRefTest, Comparisons) {
173   EXPECT_EQ(-1, SmallString<10>("aab").compare("aad"));
174   EXPECT_EQ( 0, SmallString<10>("aab").compare("aab"));
175   EXPECT_EQ( 1, SmallString<10>("aab").compare("aaa"));
176   EXPECT_EQ(-1, SmallString<10>("aab").compare("aabb"));
177   EXPECT_EQ( 1, SmallString<10>("aab").compare("aa"));
178   EXPECT_EQ( 1, SmallString<10>("\xFF").compare("\1"));
179 
180   EXPECT_EQ(-1, SmallString<10>("AaB").compare_lower("aAd"));
181   EXPECT_EQ( 0, SmallString<10>("AaB").compare_lower("aab"));
182   EXPECT_EQ( 1, SmallString<10>("AaB").compare_lower("AAA"));
183   EXPECT_EQ(-1, SmallString<10>("AaB").compare_lower("aaBb"));
184   EXPECT_EQ( 1, SmallString<10>("AaB").compare_lower("aA"));
185   EXPECT_EQ( 1, SmallString<10>("\xFF").compare_lower("\1"));
186 
187   EXPECT_EQ(-1, SmallString<10>("aab").compare_numeric("aad"));
188   EXPECT_EQ( 0, SmallString<10>("aab").compare_numeric("aab"));
189   EXPECT_EQ( 1, SmallString<10>("aab").compare_numeric("aaa"));
190   EXPECT_EQ(-1, SmallString<10>("aab").compare_numeric("aabb"));
191   EXPECT_EQ( 1, SmallString<10>("aab").compare_numeric("aa"));
192   EXPECT_EQ(-1, SmallString<10>("1").compare_numeric("10"));
193   EXPECT_EQ( 0, SmallString<10>("10").compare_numeric("10"));
194   EXPECT_EQ( 0, SmallString<10>("10a").compare_numeric("10a"));
195   EXPECT_EQ( 1, SmallString<10>("2").compare_numeric("1"));
196   EXPECT_EQ( 0, SmallString<10>("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
197   EXPECT_EQ( 1, SmallString<10>("\xFF").compare_numeric("\1"));
198   EXPECT_EQ( 1, SmallString<10>("V16").compare_numeric("V1_q0"));
199   EXPECT_EQ(-1, SmallString<10>("V1_q0").compare_numeric("V16"));
200   EXPECT_EQ(-1, SmallString<10>("V8_q0").compare_numeric("V16"));
201   EXPECT_EQ( 1, SmallString<10>("V16").compare_numeric("V8_q0"));
202   EXPECT_EQ(-1, SmallString<10>("V1_q0").compare_numeric("V8_q0"));
203   EXPECT_EQ( 1, SmallString<10>("V8_q0").compare_numeric("V1_q0"));
204 }
205 
206 }
207