def test_num_seqs_in_file():
'tests num_seqs_in_file'
fasta_fhand = open(join(TEST_DATA_DIR, 'seq.fasta'))
assert num_seqs_in_file(fasta_fhand) == 7
fastq_fhand = open(join(TEST_DATA_DIR, 'solexa.fastq'))
assert num_seqs_in_file(fastq_fhand, format_='sfastq') == 3
