101     std::string str = "hello world, world!";  in TEST()  local
102     replaceAll(str, "world", "earth");  in TEST()
103     EXPECT_EQ(str, "hello earth, earth!");  in TEST()
108     std::string str = "hello world";  in TEST()  local
109     replaceAll(str, "xxx", "abc");  in TEST()
110     EXPECT_EQ(str, "hello world");  in TEST()
115     std::string str = "apple apple";  in TEST()  local
116     replaceAll(str, "apple", "");  in TEST()
117     EXPECT_EQ(str, " ");  in TEST()
122     std::string str = "abc";  in TEST()  local
123     replaceAll(str, "", "x");  in TEST()
124     EXPECT_EQ(str, "abc");  in TEST()
129     std::string str = "Hello hEllo heLLo";  in TEST()  local
130     iReplaceAll(str, "hello", "hi");  in TEST()
131     EXPECT_EQ(str, "hi hi hi");  in TEST()
136     std::string str = "Hello World! WORLD world";  in TEST()  local
137     iReplaceAll(str, "world", "Earth");  in TEST()
138     EXPECT_EQ(str, "Hello Earth! Earth Earth");  in TEST()
143     std::string str = "Good Morning";  in TEST()  local
144     iReplaceAll(str, "night", "day");  in TEST()
145     EXPECT_EQ(str, "Good Morning");  in TEST()
150     std::string str = "ABC abc AbC";  in TEST()  local
151     iReplaceAll(str, "abc", "");  in TEST()
152     EXPECT_EQ(str, "  ");  in TEST()