def test_adding_after_pop_min_on_last_element(self):
heap = Heap(1)
_ = heap.pop_min() # heap is now empty
assert len(heap) == 0
heap.add_to_heap(2)
self.assertEqual(len(heap), 1)
def test_pop_min_on_empty_heap_raises_error(self):
heap = Heap(1)
_ = heap.pop_min() # heap is now empty
self.assertRaises(EmptyHeapError, heap.pop_min)