| Class | TestRemoveTree | Tests for remove_tree. |
| Class | TestEnsureDirectoryExists | Tests for 'ensure_directory_exists'. |
| Class | TestOpenForWriting | Tests for 'open_for_writing'. |
| Class | TestWriteFile | Undocumented |
| Class | TestFindOnPath | Undocumented |
| Class | TestProcessExists | Undocumented |