def test_counts_all_nucleotides(self):
dna = "AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC"
expected = {'A': 20, 'T': 21, 'G': 17, 'C': 12}
self.assertEqual(expected, nucleotide_counts(dna))
def test_repetitive_sequence_has_only_guanosine(self):
expected = {'A': 0, 'T': 0, 'C': 0, 'G': 8}
self.assertEqual(expected, nucleotide_counts('GGGGGGGG'))
def test_empty_dna_string_has_no_nucleotides(self):
expected = {'A': 0, 'T': 0, 'C': 0, 'G': 0}
self.assertEqual(expected, nucleotide_counts(""))
def test_counts_all_nucleotides(self):
dna = ('AGCTTTTCATTCTGACTGCAACGGGCAATATGTCT'
'CTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC')
expected = {'A': 20, 'T': 21, 'G': 17, 'C': 12}
self.assertEqual(expected, nucleotide_counts(dna))
def test_repetitive_sequence_has_only_guanosine(self):
expected = {'A': 0, 'T': 0, 'C': 0, 'G': 8}
self.assertEqual(expected, nucleotide_counts('GGGGGGGG'))
def test_empty_dna_string_has_no_nucleotides(self):
expected = {'A': 0, 'T': 0, 'C': 0, 'G': 0}
self.assertEqual(expected, nucleotide_counts(""))
