JUnit5 - ExpectedException.expectCause()等价

Question

是否有JUnit5等价于ExpectedException.expectCause() (JUnit4)？https://junit.org/junit4/javadoc/4.12/org/junit/rules/ExpectedException.html#expectCause(org.hamcrest.Matcher)

Answer 1

下面是一个示例：

public class ExpectedExceptionTest {

    @Test
    public void shouldThrow() {
        IOException exc = Assertions.assertThrows(IOException.class, this::throwing);
        Assertions.assertEquals("root cause", exc.getCause().getMessage());
    }

    private void throwing() throws IOException {
        throw new IOException(new IllegalStateException("root cause"));
    }
}

就我个人而言，我更喜欢AssertJ，它具有非常描述性的异常断言。

Answer 2

我们将ExpectedException.expectCause()替换为：

ThrowableAssert.ThrowingCallable throwingCallable  = () -> someClass.methodWhichThrowAnException(someData);
assertThatThrownBy(throwingCallable).hasCauseInstanceOf(SomeException.class);