.EDIT: Test Case

  /dir1                       /dir2
       -- file1                   -- file1 
       -- file2                   -- file2  
       -- file3 
       -- ....
       -- ...
       ---/subDir1
            --file1
            --file2

file1 of dir1 contains :- foo bar
file1  of dir2 contains :- foo 
Result - Fail

file1  of dir1 contains :- foo bar
file1  of dir2 contains :- foo bar
Result - Pass.