无法测试返回customException的类

我在上面的评论中同意@Stultuske，并将测试重写为：

@Testpublic void shouldThrowExceptionForInvalidString() {    try {        MyClass myCls = new MyClass();        Method valStr = myCls.getClass().getDeclaredMethod(     "validateString", String.class);        valStr.setAccessible(true);        valStr.invoke(myCls, "This is theDummyWord find it if you can.");    } catch (Exception e) {        assert(e instanceOf CustomException);        assert(e.getMessage.equals("String has the invalid word!"));    }}

或者如果您想使用ExpectedException

@Rulepublic ExpectedException thrown = ExpectedException.none();@Testpublic void shouldThrowExceptionForInvalidString() {    thrown.expect(CustomException.class);    thrown.expectMessage("String has the invalid word!");    MyClass myCls = new MyClass();    Method valStr = myCls.getClass().getDeclaredMethod("validateString", String.class);    valStr.setAccessible(true);    valStr.invoke(myCls, "This is theDummyWord find it if you can.");}