def test_merge_empty_heap_with_non_empty_heap(self):
a = MinHeap()
ls = [-3, 5, 7, 9, 1, 5, 2]
b = MinHeap(ls)
self.assertIsNone(a.merge(b))
self.assertEqual(a.size, len(ls))
self.assertEqual(b.size, len(ls))
def test_merge_non_empty_heap_with_non_empty_heap(self):
ls = [-3, 5, 7, 9, 1, 5, 2]
size = len(ls)
a = MinHeap(ls)
b = MinHeap(sample(ls, size))
self.assertIsNone(a.merge(b))
self.assertEqual(a.size, size * 2)
self.assertEqual(b.size, size)
def test_merge_non_empty_heap_with_empty_heap(self):
ls = [-3, 5, 7, 9, 1, 5, 2]
a = MinHeap(ls)
b = MinHeap()
self.assertIsNone(a.merge(b))
self.assertEqual(a.size, len(ls))
self.assertEqual(b.size, 0)
self.assertTrue(b.is_empty())
def test_merge_empty_heap_with_empty_heap(self):
a = MinHeap()
b = MinHeap()
self.assertIsNone(a.merge(b))
