def test_cat():
'It tests the cat function'
inh1 = StringIO.StringIO('>seq1\nACTG\n')
inh2 = StringIO.StringIO('>seq2\nGTCA\n')
outh = StringIO.StringIO()
cat(infiles=[inh1, inh2], outfile=outh)
assert outh.getvalue() == '>seq1\nACTG\n>seq2\nGTCA\n'
#it works also with None Values
outh = StringIO.StringIO()
cat(infiles=[None, None], outfile=outh)
assert outh.getvalue() == ''
def _cat_to_fasta(self, files, fasta_fhand, qual_fhand):
'It cats the given files together and it returns a fasta and qual'
#all files should be in fasta and qual
fastas, quals = self._files_to_temp_fasta(files)
cat(fastas, fasta_fhand)
cat(quals , qual_fhand)
