east the one of the base");
      assert_greater_than_equal(getBox("msubsup").height, getBox("msubsupBase").height, e, "msubsup: height is at least the one of the base");

      assert_approx_equals(getBox("msub").height, Math.max(getBox("msubSub").bottom, getBox("msubBase").bottom) - getBox("msubBase").top, e, "msub: height is determined by the top/bottom sides of base/scripts");
      assert_approx_equals(getBox("msup").height, getBox("msupBase").bottom - Math.min(getBox("msupSup").top, getBox("msupBase")