def test_extract_min_maintains_the_heap_order(self):
heap = MinHeap()
heap.insert(1)
heap.insert(2)
heap.insert(3)
heap.insert(4)
heap.insert(5)
self.assertEqual(heap.extract_min(), 1)
self.assertEqual(heap.find_min(), 2)
self.assertEqual(heap.extract_min(), 2)
self.assertEqual(heap.find_min(), 3)
def test_find_min_returns_the_minimum_data(self):
minimum = 0
heap = MinHeap()
heap.insert(42)
heap.insert(minimum)
heap.insert(1)
self.assertEqual(heap.find_min(), minimum)