JUnit test abnormalities

JUnit test abnormalities

1. Ancient writing

    @Test
    void name() {
        boolean hasException = false;
        String exceptionMessage = null;
        try {
            check();
        } catch (RuntimeException e) {
            hasException = true;
            exceptionMessage = e.getMessage();
        }
        assertEquals("runtime", exceptionMessage);
        assertTrue(hasException);
    }

    void check() {
        throw new RuntimeException("runtime");
    }

2. Longhand (fallible)
   the Check and the Message exception type

   @Test
   void name() {
      assertThrows(RuntimeException.class, () -> check(), "aaa");
   }

   void check() {
       throw new RuntimeException("runtime");
   }

This test we found that abnormal test message but not able to live.
Pa Pa a source

Found that consumption actually test message is not unusual news, but the exception is not expected, and there is no fault to consumption.
2.1 longhand

   @Test
    void name() {
        final RuntimeException runtimeException = assertThrows(RuntimeException.class, () -> check());
        assertEquals("runtime", runtimeException.getMessage());
    }

    void check() {
        throw new RuntimeException("runtime");
    }

3. Streaming writing

     @Test
    void name() {
        assertThatThrownBy(() -> check())
            .isInstanceOf(RuntimeException.class)
            .hasMessage("runtime");
    }

    void check() {
        throw new RuntimeException("runtime");
    }

Personally I think the wording of the current flow within the purview of the most elegant.