88     std::string path = KernelInterface::GetInstance().JoinPath(first, second);  variable
89     EXPECT_EQ(path.compare(first + "/" + second), 0);
90     path = KernelInterface::GetInstance().JoinPath(empty, second);
91     EXPECT_EQ(path.compare(second), 0);
92     path = KernelInterface::GetInstance().JoinPath(first, empty);
93     EXPECT_EQ(path.compare(first + "/"), 0);
94     path = KernelInterface::GetInstance().JoinPath(empty, empty);
95     EXPECT_EQ(path.compare(empty), 0);
98     path = KernelInterface::GetInstance().JoinPath(first, second, third);
99     EXPECT_EQ(path.compare(first + "/" + second + "/" + third), 0);
100     path = KernelInterface::GetInstance().JoinPath(empty, second, third);
101     EXPECT_EQ(path.compare(second + "/" + third), 0);
102     path = KernelInterface::GetInstance().JoinPath(first, empty, third);
103     EXPECT_EQ(path.compare(first + "/" + third), 0);
104     path = KernelInterface::GetInstance().JoinPath(first, second, empty);
105     EXPECT_EQ(path.compare(first + "/" + second + "/"), 0);
107     path = KernelInterface::GetInstance().JoinPath(empty, empty, third);
108     EXPECT_EQ(path.compare(third), 0);
109     path = KernelInterface::GetInstance().JoinPath(empty, second, empty);
110     EXPECT_EQ(path.compare(second + "/"), 0);
111     path = KernelInterface::GetInstance().JoinPath(first, empty, empty);
112     EXPECT_EQ(path.compare(first + "/"), 0);
114     path = KernelInterface::GetInstance().JoinPath(empty, empty, empty);
115     EXPECT_EQ(path.compare(empty), 0);
124     std::string path = KernelInterface::GetInstance().JoinPath(BASE_PATH, "testFile");  variable
125     ret = KernelInterface::GetInstance().CreateFile(path);
127     ret = KernelInterface::GetInstance().IsFileExists(path);
129     KernelInterface::GetInstance().RemoveFile(path);
135     std::string path = KernelInterface::GetInstance().JoinPath(BASE_PATH, "testFile");  variable
136     KernelInterface::GetInstance().RemoveFile(path);
137     bool ret = KernelInterface::GetInstance().CreateFile(path);
138     ret = ret && KernelInterface::GetInstance().IsFileExists(path);
139     ret = ret && KernelInterface::GetInstance().RemoveFile(path);
141     ret = KernelInterface::GetInstance().IsFileExists(path);
148     std::string path = KernelInterface::GetInstance().JoinPath(BASE_PATH, "testFile");  variable
149     KernelInterface::GetInstance().RemoveFile(path);
150     bool ret = KernelInterface::GetInstance().CreateFile(path);
151     ret = ret && KernelInterface::GetInstance().IsFileExists(path);
156     ret = KernelInterface::GetInstance().WriteToFile(path, line1); // curr content: "line1"
157     ret = ret && KernelInterface::GetInstance().ReadFromFile(path, output);
161 …ret = KernelInterface::GetInstance().WriteToFile(path, line1, false); // curr content: "line1line1"
162     ret = ret && KernelInterface::GetInstance().ReadFromFile(path, output);
166     ret = KernelInterface::GetInstance().WriteToFile(path, "", false); // curr content: "line1line1"
167     ret = ret && KernelInterface::GetInstance().ReadFromFile(path, output);
171     ret = KernelInterface::GetInstance().WriteToFile(path, "", true); // curr content: ""
172     ret = ret && KernelInterface::GetInstance().ReadFromFile(path, output);
175     KernelInterface::GetInstance().RemoveFile(path);
181     std::string path = KernelInterface::GetInstance().JoinPath(BASE_PATH, "testFile");  variable
182     KernelInterface::GetInstance().RemoveFile(path);
183     bool ret = KernelInterface::GetInstance().CreateFile(path);
184     ret = ret && KernelInterface::GetInstance().IsFileExists(path);
192     ret = KernelInterface::GetInstance().WriteToFile(path, line1); // curr content: "line1"
193 …ret = ret && KernelInterface::GetInstance().WriteToFile(path, "\n", false); // curr content: "line…
194 …ret = ret && KernelInterface::GetInstance().WriteToFile(path, line2, false); // curr content: "lin…
195     ret = ret && KernelInterface::GetInstance().ReadFromFile(path, output);
199 …ret = KernelInterface::GetInstance().WriteToFile(path, lines); // curr content: "line1\nline2\nlin…
200     ret = ret && KernelInterface::GetInstance().ReadFromFile(path, output);
203     KernelInterface::GetInstance().RemoveFile(path);
209     std::string path = "/NoSuchDir/file";  variable
212     ret = ret || KernelInterface::GetInstance().CreateFile(path);
213     ret = ret || KernelInterface::GetInstance().IsFileExists(path);
231     std::string path = "/NoSuchDir/NoSuchFile";  variable
232     KernelInterface::GetInstance().RemoveFile(path);
240     bool ret = KernelInterface::GetInstance().WriteToFile(path, line1, false);
241     ret = ret || KernelInterface::GetInstance().WriteToFile(path, line1);
243     ret = ret || KernelInterface::GetInstance().ReadFromFile(path, output);
247     ret = ret || KernelInterface::GetInstance().ReadLinesFromFile(path, outputLines);
256     std::string path = KernelInterface::GetInstance().JoinPath(BASE_PATH, "testDir");  variable
257     KernelInterface::GetInstance().RemoveDirRecursively(path);
258     ret = ret && KernelInterface::GetInstance().CreateDir(path);
259     ret = ret && KernelInterface::GetInstance().IsDirExists(path);
261     KernelInterface::GetInstance().RemoveDirRecursively(path);
263     path = KernelInterface::GetInstance().JoinPath(path, "midDir", "subDir");
264     ret = ret && KernelInterface::GetInstance().CreateDir(path);
265     ret = ret && KernelInterface::GetInstance().IsDirExists(path);
267     KernelInterface::GetInstance().RemoveDirRecursively(path);