def test_next_seqnum_with_no_values_so_far(self):
"""
If there are no sequenced files so far the sequence number returned
should be "00001".
"""
files = ['Web.mp3', 'Xen.mp3']
self.assertEqual(1, next_seqnum(files))
def test_next_seqnum_with_negative_prefix(self):
"""
For files with negative numeric prefixes the returned value
should be "00001".
"""
files = ['-001-Web.mp3', '-112 Xen.mp3']
self.assertEqual(1, next_seqnum(files))
def test_next_seqnum(self):
"""The next unused sequence number is returned."""
files = ['999- Web.mp3', ' 035- Web.mp3']
self.assertEqual(1000, next_seqnum(files))
