Rename to nonexisting file: passed
Rename to existing file: passed
Renaming a nonexisting file: fails as expected
Renaming to a nonexisting directory: fails as expected
Rename directory to a nonexisting directory: passed
Rename a nonexisting directory: fails as expected
Rename directory to a non-empty directory: fails as expected
Rename directory to existing empty directory: passed
Rename existing empty directory to itself: source directory still exists!
Rename directory to existing file: fails as expected