对于junit5.x，可以使用assertThrows，如下所示

 @Test
public void testThrowsNullPointerException() {
    Throwable exception = assertThrows(NullPointerException.class, () -> test.Func1());
    assertEquals("expected messages", exception.getMessage());
}

 @Test(expected = NullPointerException.class)
public void testNullPointerException() {
    test.Func1();
}