def METHOD_NAME(screen: Screen):
    input_ = ui.input()
    def assert_props(*props: str) -> None:
        class_conditions = [f'contains(@class, "q-field--{prop}")' for prop in props]
        assert screen.selenium.find_element(By.XPATH, f'//label[{" and ".join(class_conditions)}]')
    screen.open('/')
    screen.wait(0.5)
    assert_props('standard')
    input_.props('dark')
    assert_props('standard', 'dark')
    input_.props('dark')
    assert_props('standard', 'dark')
    input_.props(remove='dark')
    assert_props('standard')