Testlauf $ python test_parselist.py FFFF ====================================================================== FAIL: Test parse_int_list with empty string ---------------------------------------------------------------------- Traceback (most recent call last): [...] AssertionError: None != [] ====================================================================== FAIL: Test parse_int_list with several ints [...] AssertionError: None != [1, 2, 3] ====================================================================== FAIL: Test parse_int_list with one ints [...] AssertionError: None != [42] ====================================================================== FAIL: Test parse_int_list with various amounts of whitespace [...] AssertionError: None != [1, 2, 4] ---------------------------------------------------------------------- Ran 4 tests in 0.001s FAILED (failures=4)