Junit测试内部多个异常 - MultipleFailureException

Question

我的测试功能是：

public void functionToTest(MetricConfig flinkMetricsConfig) {
        try {
            this.initializeFunction(inputs);
        } catch (Exception ex) {
            throw new RuntimeException("Trouble configuring ", ex);
        }
    }

内部this.initializeFunction(...)对其中一个类变量进行了验证检查，并提供NullpointerException。 RuntimeException与Trouble configuring message一起发现了异常。

在我的单元测试中，我正在测试类变量的验证检查失败的情况。

@Rule
    public ExpectedException expectedException = ExpectedException.none();

@Test
    public void testWithFailedValidation() {
        expectedException.expect(RuntimeException.class);
        expectedException.expectMessage("Trouble configuring... ");
        functionToTest();
    }

我收到此错误：

java.lang.AssertionError: 
Expected: an instance of java.lang.RuntimeException
     but: <org.junit.internal.runners.model.MultipleFailureException: There were 2 errors:
  java.lang.RuntimeException(Trouble configuring... )
  java.lang.NullPointerException(null)> is a org.junit.internal.runners.model.MultipleFailureException
Stacktrace was: org.junit.internal.runners.model.MultipleFailureException: There were 2 errors:
  java.lang.RuntimeException(Trouble configuring... )
  java.lang.NullPointerException(null)
    at junit internals blabla stacktrace...

-----------------------更新------------------ 嗨，我把测试改为：

@Rule
    public ExpectedException expectedException = ExpectedException.none();

@Test
    public void testWithFailedValidation() {
        expectedException.expect(MultipleFailureException.class);
        expectedException.expectMessage("Trouble configuring... ");
        functionToTest();
    }

测试通过。但我想确保MultipleFailureException包含RuntimeException和NullException。有办法检查那些吗？我正在使用junit 4.11。谢谢。

------------更新------------------- 我使用try catch（Error1）{assertbehaviour1} catch（错误2）{assert behaviour2}进行测试。