def test_store_empty_stack():
state = State()
with pytest.raises(exc.StackError):
state.store()
def test_store():
state = State(stack=[5, 80])
state.store()
assert state.heap == {5: 80}
def test_store_only_one_item_in_stack():
state = State(stack=[5])
with pytest.raises(exc.StackError):
state.store()