def METHOD_NAME(self):
    self.this_dir = os.path.dirname(os.path.realpath(__file__))
    self.test_files = os.path.join(self.this_dir, "test_files")
    self.not_fasta = os.path.join(self.test_files, "not_a_fasta.txt")
    self.empty_fasta = os.path.join(self.test_files, "empty.fasta")
    self.single_seq_fasta = os.path.join(self.test_files, "one_sequence.fasta")
    self.five_seq_fasta = os.path.join(self.test_files, "five_sequences.fasta")