 inner box is ignored.
        let container = document.getElementById(id);
        let wrapper = container.getElementsByClassName("wrapper")[0];
        let wrapperBox = wrapper.getBoundingClientRect();
        assert_equals(wrapperBox.width == 0, applied, "width is zero");
        assert_equals(wrapperBox.height == 0, applied, "height is zero");
    }

    function setContain(id, value) {
        let container = document.getElementById(id);
        let wrapper = container.getElementsByClassName("wrapper")