unittests/ADT/SmallStringTest.cpp

   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
  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.
  40 TEST_F(SmallStringTest, EmptyStringTest) {
  41   SCOPED_TRACE("EmptyStringTest");
  42   assertEmpty(theString);
  43   EXPECT_TRUE(theString.rbegin() == theString.rend());
  44 }
  45
  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
  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
  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
  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
  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
  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
  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
  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
 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
 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
 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
 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
 172 TEST_F(SmallStringTest, 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 // Check gtest prints SmallString as a string instead of a container of chars.
 207 // The code is in utils/unittest/googletest/internal/custom/gtest-printers.h
 208 TEST_F(SmallStringTest, GTestPrinter) {
 209   EXPECT_EQ(R"("foo")", ::testing::PrintToString(SmallString<1>("foo")));
 210   const SmallVectorImpl<char> &ErasedSmallString = SmallString<1>("foo");
 211   EXPECT_EQ(R"("foo")", ::testing::PrintToString(ErasedSmallString));
 212 }
 213
 214 } // namespace