JUnit异常断言

使用Junit时，有多种方式来进行异常的断言

1. ExeceptedException & @Rule，可以同时断言异常类型和消息

public class ExpectedExceptionsTest {
    @Rule
    public ExpectedException thrown = ExpectedException.none(); //@Rule 注解的  ExpectedException 变量声明，它必须为  public
    @Test
    public void verifiesTypeAndMessage() {
        thrown.expect(RuntimeException.class);
        thrown.expectMessage("Runtime exception occurred");
        throw new RuntimeException("Runtime exception occurred");
    }
}

参考：JUnit：使用ExpectedException进行异常测试

2. Test(excepted=XXException.class)，只能断言异常类型，不能断言消息

public class ExpectedExceptionsTest {
    @Test(excepted=RuntimeException.class)
    public void verifiesTypeAndMessage() {
        throw new RuntimeException("Runtime exception occurred");
    }
}