def testTrimZero(self):
"""
The trim function must work as expected when the trim quantity is 0.
"""
ar = AlignedRead('id', '---ACGTACGT--')
self.assertTrue(ar.trim(0))
self.assertEqual('ACGTACGT', ar.sequence)
def testTrim(self):
"""
The trim function must work as expected.
"""
ar = AlignedRead('id', '---ACGTACGT--')
self.assertEqual(8, len(ar))
self.assertTrue(ar.trim(2))
self.assertEqual('GTAC', ar.sequence)
def testTrimWithReadTooShort(self):
"""
The trim function must return False if the read is too short.
"""
ar = AlignedRead('id', '---ACGTACGT--')
self.assertFalse(ar.trim(4))
