test_data/emptydirs/firstdir
test_data/emptydirs/main
test_data/emptydirs/main/subdir1
test_data/emptydirs/main/subdir1/subsubdir1
test_data/emptydirs/main/subdir1/subsubdir2
test_data/emptydirs/main/subdir1/subsubdir3
test_data/emptydirs/main/subdir2
test_data/emptydirs/main/subdir2/subsubdir1
test_data/emptydirs/main/subdir3
test_data/emptydirs/main/subdir3/subsubdir1
test_data/emptydirs/main/subdir3/subsubdir1/subsubsubdir1
test_data/emptydirs/other
test_data/emptydirs/other/subdir1
test_data/emptydirs/other/subdir1/subsubdir1
test_data/emptydirs/other/subdir1/subsubdir2
test_data/emptydirs/other/subdir1/subsubdir2/subsubsubdir1
test_data/emptydirs/other/subdir1/subsubdir3
test_data/emptydirs/seconddir