def test_is_example_file_true_if_has_suffix():
    """
    Should be true if ends in EXAMPLE_FILE_SUFFIX.
    """
    file_name = 'find.md'
    actual = util._is_example_file(file_name)
    assert actual == True

    Should be true if ends in EXAMPLE_FILE_SUFFIX.
    
test/util_test.py