Test 1 , Filename: foobar.exe
    Expected: exe, Actual: exe
      PASS!
Test 2 , Filename: foobar.EXE
    Expected: EXE, Actual: EXE
      PASS!
Test 3 , Filename: foobar.
    Expected: , Actual: 
      PASS!
Test 4 , Filename: foobar
    Expected: , Actual: 
      PASS!
Test 5 , Filename: foobar.tar.gz
    Expected: gz, Actual: gz
      PASS!