def test_filter_on_chromosome(self):
rna_seq = FeatureSet('Transcripts-ex1.txt')
rna_chr = rna_seq.filterByChr('chr3LHet')
self.assertEqual(len(rna_chr),1,
"Wrong number of chromosomes")
for rna_data in rna_chr:
self.assertEqual(rna_data.chrom,'chr3LHet',
"Wrong chromosome filtered")
