def test_no_args(self):
result = merge.merge_intersection()
self.assertRaises(StopIteration, next, result)
def test_single_empty_iterator(self):
result = merge.merge_intersection(iter([]))
self.assertRaises(StopIteration, next, result)
def test_intersecting_three(self):
values = [[1, 2, 3], [2, 3, 4], [3, 4, 5]]
result = merge.merge_intersection(*(iter(v) for v in values))
self.assertEqual(3, next(result))
self.assertRaises(StopIteration, next, result)
def test_proper_subset(self):
values = [[0, 1, 2, 3, 4], [2, 3]]
result = merge.merge_intersection(*(iter(v) for v in values))
self.assertEqual(2, next(result))
self.assertEqual(3, next(result))
self.assertRaises(StopIteration, next, result)
def test_no_overlapping_values(self):
values = [[0, 1], [2, 3], [4, 5]]
result = merge.merge_intersection(*(iter(v) for v in values))
self.assertRaises(StopIteration, next, result)
def test_two_matching_values(self):
values = [[1, 2], [1, 2]]
result = merge.merge_intersection(*(iter(v) for v in values))
self.assertEqual(values[0][0], next(result))
self.assertEqual(values[0][1], next(result))
self.assertRaises(StopIteration, next, result)
def test_single_value_iterator(self):
values = [1]
result = merge.merge_intersection(iter(values))
self.assertEqual(values[0], next(result))
self.assertRaises(StopIteration, next, result)