使用Mockito，如何在布尔条件下测试“有限循环"? [英] Using Mockito, how do I test a 'finite loop' with a boolean condition?

问题描述

使用Mockito，如何测试有限循环"?

Using Mockito, how do I test a 'finite loop' ?

我有一个要测试的方法，如下所示:

I have a method I want to test that looks like this:

public void dismissSearchAreaSuggestions()
{
    while (areSearchAreaSuggestionsVisible())
    {
        clickSearchAreaField();
        Sleeper.sleepTight(CostTestBase.HALF_SECOND);
    }
}

而且，我想对其进行测试，以使对"areSearchAreaSuggestionsVisible"的前两个调用返回TRUE，如下所示:

And, I want to test it so that the first 2 calls to 'areSearchAreaSuggestionsVisible' return a TRUE, like so:

Mockito.when(mockElementState.isElementFoundAndVisible(LandingPage.ADDRESS_SUGGESTIONS, 
  TestBase.ONE_SECOND)).thenReturn(Boolean.TRUE);

但是，第三个电话是FALSE.

But, the third call is FALSE.

Mockito.when(mockElementState.isElementFoundAndVisible(LandingPage.ADDRESS_SUGGESTIONS, 
  TestBase.ONE_SECOND)).thenReturn(Boolean.FALSE);

我如何在一种测试方法中使用Mockito做到这一点?

How could I do that with Mockito in one single test method?

到目前为止，这是我的测试班:

Here is my test class so far:

@Test
public void testDismissSearchAreaSuggestionsWhenVisible()
{
  Mockito.when(mockElementState.isElementFoundAndVisible(LandingPage.ADDRESS_SUGGESTIONS, 
   CostTestBase.ONE_SECOND)).thenReturn(Boolean.TRUE);
    landingPage.dismissSearchAreaSuggestions();
   Mockito.verify(mockElementState).isElementFoundAndVisible(LandingPage
      .ADDRESS_SUGGESTIONS, CostTestBase.ONE_SECOND);
}

推荐答案

只要您将所有存根都设为同一链的一部分，Mockito就会按顺序进行遍历，并始终重复最后的电话.

As long as you make all of your stubs a part of the same chain, Mockito will proceed through them in sequence, always repeating the final call.

// returns false, false, true, true, true...
when(your.mockedCall(param))'
    .thenReturn(Boolean.FALSE, Boolean.FALSE, Boolean.TRUE);

您也可以使用此语法...

You can also do so with this syntax...

// returns false, false, true, true, true...
when(your.mockedCall(param))
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.TRUE);

...如果动作并非全部返回值，则可以派上用场.

...which can come in handy if the actions aren't all return values.

// returns false, false, true, then throws an exception
when(your.mockedCall(param))
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.TRUE)
    .thenThrow(new Exception("Called too many times!"));

如果您想使事情变得更复杂，请考虑编写

If you want things to get more complex than that, consider writing an Answer.

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