def test_delete_removes_target_item_from_heap():
heap = Heap(5)
heap.insert(1)
heap.insert(3)
heap.insert(2)
heap.insert(4)
heap.delete(3)
assert heap.get_size() == 3
assert heap.extract() == 4
assert heap.extract() == 2
def test_delete_raises_exception_if_value_not_present():
heap = Heap(5)
heap.insert(1)
with pytest.raises(Exception):
heap.delete(4)