try { ClassUtils.getShortClassName((Class) null); fail(); } catch (IllegalArgumentException ex) {}
assertEquals("", ClassUtils.getShortClassName((Class) null));
    public void test_getShortClassName_Class() {        assertEquals("ClassUtils", ClassUtils.getShortClassName(ClassUtils.class));        assertEquals("Map.Entry", ClassUtils.getShortClassName(Map.Entry.class));        try {            ClassUtils.getShortClassName((Class) null);            fail();        } catch (IllegalArgumentException ex) {}    }