该系列文章翻译自https://www.baeldung.com/mockito-series

下面将以MyList类为例进行介绍

public class MyList extends AbstractList<String> {
 
    @Override
    public String get(final int index) {
        return null;
    }
    @Override
    public int size() {
        return 0;
    }
}

Verify常见用法

1. 校验调用了某个方法

List<String> mockedList = mock(MyList.class);
mockedList.size();
verify(mockedList).size();

2. 校验调用某个方法的次数

List<String> mockedList = mock(MyList.class);
mockedList.size();
verify(mockedList, times(1)).size();

3. 校验没有调用任何方法

List<String> mockedList = mock(MyList.class);
verifyZeroInteractions(mockedList);

4. 校验没有调用某个方法

List<String> mockedList = mock(MyList.class);
verify(mockedList, times(0)).size();

或者

List<String> mockedList = mock(MyList.class);
mockedList.size();
verify(mockedList, never()).clear();

5. 判断是否有没有被校验的调用

List<String> mockedList = mock(MyList.class);
//interactions
mockedList.size();
mockedList.clear();
//verification
verify(mockedList).size();
 //following will fail because 'clear()' is unexpected
verifyNoMoreInteractions(mockedList);

6. 校验调用的顺序

List<String> mockedList = mock(MyList.class);
mockedList.size();
mockedList.add("a parameter");
mockedList.clear();
 
InOrder inOrder = Mockito.inOrder(mockedList);
inOrder.verify(mockedList).size();
inOrder.verify(mockedList).add("a parameter");
inOrder.verify(mockedList).clear();

7. 校验某个方法至少/至多调用的次数

List<String> mockedList = mock(MyList.class);
mockedList.clear();
mockedList.clear();
mockedList.clear();
 
verify(mockedList, atLeast(1)).clear();
verify(mockedList, atMost(10)).clear();

8. 校验调用某个方法时使用了特定的参数

固定参数

List<String> mockedList = mock(MyList.class);
mockedList.add("test");
verify(mockedList).add("test");

参数匹配器

List<String> mockedList = mock(MyList.class);
mockedList.add("test");
verify(mockedList).add(anyString());

9. 使用参数捕获器

List<String> mockedList = mock(MyList.class);
mockedList.addAll(Lists.<String> newArrayList("someElement"));
ArgumentCaptor<List> argumentCaptor = ArgumentCaptor.forClass(List.class);
verify(mockedList).addAll(argumentCaptor.capture());
List<String> capturedArgument = argumentCaptor.<List<String>> getValue();
assertThat(capturedArgument, hasItem("someElement"));