java - 模拟抛出异常的服务？

Question

我想测试一个委托(delegate)给服务方法“isInProgress”的 JSF Backing-Bean 方法“isInProgress”。当服务方法抛出异常时，bean 应该在特定的事件记录器上放置一个事件并返回 false。

当我调试以下测试时，我进入了捕获 block 。模拟服务不会抛出异常，但会返回一个“默认答案”，该答案对于 boolean 值是假的。 我做错了什么？

我还想知道是否可以以某种方式避免围绕“when”调用的 try-catch，因为实际的异常被被测 bean 吞没了。事实上，我认为“声明式”将方法名称传递给“何时”就足够了。 有没有办法让那个更干净？

@Test
public void testIsInProgressExeption() {
    //prepare object and inputs
    MyBean bean = new MyBean();
    MyService service = mock(MyAdapterService.class);
    bean.setService(service);

    try {
        when(bean.getService().isInProgress()).thenThrow(new Exception());
    } catch (Exception e) {

        //prepare expected object and result
        MyBean expectedBean = new MyBean();
        expectedBean.setService(service);
        boolean expected = false;

        //execute method under test
        boolean actual = bean.isInProgress();

        //check return values and exceptions
        assertEquals(expected, actual);

        //check that bean did not change unexpectedly
        assertTrue(bean.equals(expectedBean));

        //check sideeffects on event log
        assertTrue(logEvents.containsMessage("MDI09"));
    }

}

此处供引用的是更新后的测试:

@Test
public void testIsInProgressExeption() throws Exception {
    //prepare object and inputs
    MyBean bean = new MyBean();
    MyService service = mock(MyAdapterService.class);
    bean.setService(service);

    when(bean.getService().isInProgress()).thenThrow(new Exception());

    //prepare expected object and result
    MyBean expectedBean = new MyBean();
    expectedBean.setService(service);
    boolean expected = false;

    //execute method under test
    boolean actual = bean.isInProgress();

    //check return values and exceptions
    assertEquals(expected, actual);

    //check that bean did not change unexpectedly
    assertTrue(bean.equals(expectedBean));

    //check sideeffects on event log
    assertTrue(logEvents.containsMessage("MDI09"));

}

Answer 1

将 when 子句移出 try block 并将其更改为:

when(service.isInProgress()).thenThrow(new Exception());

现在它应该在调用时抛出异常。