mockito给定大小的anyList [英] mockito anyList of a given size

问题描述

我正在使用mockito验证是否已调用某个方法。方法：

  public void createButtons（final List< Button> buttonsConfiguration）{...} 
  

由于传递哪个列表并不重要，我验证方法是如下调用的：

  verify（mock）.createButtons（Matchers.anyListOf（Button.class））; 
  

但是， List 的大小是重要。因此，哪个 List 并不重要，但列表必须有X个元素。

这是可能的吗？所有？

解决方案

一种方法是使用Captor

  ArgumentCaptor<列表> captor = ArgumentCaptor.forClass（List.class）; 
 verify（mock）.createButtons（captor.capture（））; 
 assertEquals（x，captor.getValue（）。size（））; //或者如果期望多个列表：
 assertEquals（x，captor.getValues（）。size（））; 
  

参见http://docs.mockito.googlecode.com/hg/org/mockito/Mockito.html#15 了解文档。

您还可以使用自定义参数匹配器。文档显示了一个完全符合您要求的示例：

http://docs.mockito.googlecode.com/hg/org/mockito/ArgumentMatcher.html

  class IsListOfTwoElements扩展ArgumentMatcher< List> {
 public boolean matches（Object list）{
 return（（List）list）.size（）== 2; 
} 
} 
 
 List mock = mock（List.class）; 
 when（mock.addAll（argThat（new IsListOfTwoElements（））））。thenReturn（true）; 
 mock.addAll（Arrays.asList（one，two））; 
 verify（mock）.addAll（argThat（new IsListOfTwoElements（）））; 
  

例如，您可以添加构造函数，以便指定所需的列表大小等。 / p>

I'm verifying with mockito that a method has been called. The method:

public void createButtons(final List<Button> buttonsConfiguration) {...}

Since It doesn't matter which list is passed I verify that the method is called as follows:

verify(mock).createButtons(Matchers.anyListOf(Button.class));

But, the size of the List is important. So, it doesn't matter which List but the list has to have X elements.

Is that possible at all?

解决方案

One way is to use a Captor

ArgumentCaptor<List> captor = ArgumentCaptor.forClass(List.class);
verify(mock).createButtons(captor.capture());
assertEquals(x, captor.getValue().size()); // or if expecting multiple lists:
assertEquals(x, captor.getValues().size());

See http://docs.mockito.googlecode.com/hg/org/mockito/Mockito.html#15 for the documentation.

You could also use a custom argument matcher. The documentation shows an example that does exactly what you want:

http://docs.mockito.googlecode.com/hg/org/mockito/ArgumentMatcher.html

 class IsListOfTwoElements extends ArgumentMatcher<List> {
     public boolean matches(Object list) {
         return ((List) list).size() == 2;
     }
 }

 List mock = mock(List.class);
 when(mock.addAll(argThat(new IsListOfTwoElements()))).thenReturn(true);
 mock.addAll(Arrays.asList("one", "two"));
 verify(mock).addAll(argThat(new IsListOfTwoElements()));

You could, for instance, also add a constructor so you can specify list size desired, etc.

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