def test_invalid_range(self):
"""
If range start value is greater than the end one, an error is raised.
"""
ranges = [1, 2, (5, 3), 10]
self.assertRaises(ValueError, list, ranges_to_sequence(ranges))
def test_many_elements(self):
ranges = [1, 2, (15, 17), 19, (21, 24), 26, 27]
self.assertEqual(list(ranges_to_sequence(ranges)),
[1, 2, 15, 16, 17, 19, 21, 22, 23, 24, 26, 27])
def test_three_elements(self):
self.assertEqual(list(ranges_to_sequence([(1, 3)])), [1, 2, 3])
def test_two_elements(self):
self.assertEqual(list(ranges_to_sequence([1, 2])), [1, 2])
def test_one_element(self):
self.assertEqual(list(ranges_to_sequence([1])), [1])
def test_empty(self):
self.assertEqual(list(ranges_to_sequence([])), [])