30   void MakeEmpty(std::string& item) const {  in MakeEmpty()
33   bool IsEmpty(const std::string& item) const {  in IsEmpty()
42   std::string RandomString(size_t len) {  in RandomString()
43     std::ostringstream oss;  in RandomString()
65   HashSet<std::string, IsEmptyFnString> hash_set;  in TEST_F()
66   const std::string test_string = "hello world 1234";  in TEST_F()
81   HashSet<std::string, IsEmptyFnString> hash_set;  in TEST_F()
83   std::vector<std::string> strings;  in TEST_F()
113   HashSet<std::string, IsEmptyFnString> hash_set;  in TEST_F()
116   std::vector<std::string> strings;  in TEST_F()
123   std::map<std::string, size_t> found_count;  in TEST_F()
124   for (const std::string& s : hash_set) {  in TEST_F()
143   HashSet<std::string, IsEmptyFnString> hash_seta, hash_setb;  in TEST_F()
144   std::vector<std::string> strings;  in TEST_F()
150   std::swap(hash_seta, hash_setb);  in TEST_F()
160   HashSet<std::string, IsEmptyFnString> hash_set;  in TEST_F()
161   std::unordered_multiset<std::string> std_set;  in TEST_F()
162   std::vector<std::string> strings;  in TEST_F()
174     size_t delta = std::abs(static_cast<ssize_t>(target_size) -  in TEST_F()
184       const std::string& s = strings[PRand() % string_count];  in TEST_F()
189       const std::string& s = strings[PRand() % string_count];  in TEST_F()
203   void MakeEmpty(std::pair<std::string, int>& pair) const {  in MakeEmpty()
206   bool IsEmpty(const std::pair<std::string, int>& pair) const {  in IsEmpty()
212   HashMap<std::string, int, IsEmptyStringPair> hash_map;  in TEST_F()
213   hash_map.Insert(std::make_pair(std::string("abcd"), 123));  in TEST_F()
214   hash_map.Insert(std::make_pair(std::string("abcd"), 124));  in TEST_F()
215   hash_map.Insert(std::make_pair(std::string("bags"), 444));  in TEST_F()
216   auto it = hash_map.Find(std::string("abcd"));  in TEST_F()
219   it = hash_map.Find(std::string("abcd"));  in TEST_F()