为什么我的 `assertEquals` 语句没有全部显示？

Question

The following is a snippet from my JUnit5 test class.

@Test
@DisplayName("This is just a simple JUnit 5 test")
void testSimple() {
    assertEquals(2, 3, "this is the 1st assertEquals");
    assertEquals(4, 5, "this is the 2nd assertEquals");
    assertEquals(5, 6, "this is the 3rd asswerEquals");
}

However, when I run this, I only manage to get the first assert statement to show the message. As all of them clearly fail, shouldn't they all be showing their respective messages?

Answer 1

As highlighted in the comments section above, an exception is thrown if assertEquals fails. This prevents any following statements from being reached.

Answer 2

Normally, JUnit will not continue after the first failing test was encountered. There are a few reasons for this, the most important (IMHO) are:

• If one assertion fails, it's likely for the subsequent ones to fail as well. Anyway, the whole test will be considered as failing.
• Possible (but not mandatorily), your fist assertions can set up things for the following ones and/or check their prerequisites.

If you need to continue your tests even after a failure, see here for an answer showing how to achieve this.

Answer 3

You can use assertAll to assert all tests together:

Assertions.assertAll(
            "heading",
            () -> assertEquals(2, 3, "this is the 1st assertEquals"),
            () -> assertEquals(4, 5, "this is the 2nd assertEquals"),
            () -> assertEquals(5, 6, "this is the 3rd assertEquals")
    );