查看下面的代码,我只希望对getSand()
的调用发生一次,但是测试失败了四次调用。这些电话在哪里发生?我想编写一个测试,以确保只对getSand()
进行一次调用。
来源
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Answers;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
@RunWith(MockitoJUnitRunner.class)
public class DeepSandTest {
@Mock(answer = Answers.RETURNS_DEEP_STUBS)
SandBox mockSandBox;
@Test
public void should(){
when(mockSandBox.getSand().doA()).thenReturn(1);
when(mockSandBox.getSand().doB()).thenReturn(1);
when(mockSandBox.getSand().doC()).thenReturn(1);
DeepSand deepSand = new DeepSand(mockSandBox);
deepSand.getTipple();
verify(mockSandBox, times(1)).getSand();
}
public class DeepSand{
private SandBox sandBox;
public DeepSand(SandBox sandBox) {
this.sandBox = sandBox;
}
public void getTipple(){
Sand sand = sandBox.getSand();
sand.doA();
sand.doB();
sand.doC();
}
}
public interface SandBox{
public Sand getSand();
}
public interface Sand{
public Integer doA();
public Integer doB();
public Integer doC();
}
}
输出
org.mockito.exceptions.verification.TooManyActualInvocations:
mockSandBox.getSand();
Wanted 1 time:
-> at DeepSandTest.should(DeepSandTest.java:26)
But was 4 times. Undesired invocation:
-> at DeepSandTest.should(DeepSandTest.java:20)
详细信息 Java 1.6,JUnit 4.11,Mockito 1.9.5
如果您将深层存根视为模拟对象树,那么您应该只验证叶子(“链中的最后一个模拟”),因为节点包含在设置叶子行为所需的调用链中。换句话说,在设置叶子期间调用节点 。
答案 0 :(得分:10)
它将您的设置计为调用,因为深层存根是not supported in the verification API,并在第二次调用时抱怨:
when(mockSandBox.getSand().doB()).thenReturn(1);
我会跳过使用RETURNS_DEEP_STUBS并只使用另一个模拟:
...
@Mock
SandBox mockSandBox;
@Mock
Sand sand;
@Test
public void should(){
when(mockSandBox.getSand()).thenReturn(sand);
when(sand.doA()).thenReturn(1);
when(sand.doB()).thenReturn(1);
when(sand.doC()).thenReturn(1);
...
答案 1 :(得分:9)
来自Answers.RETURNS_DEEP_STUBS的文档:
Please see the {@link org.mockito.Mockito#RETURNS_DEEP_STUBS} documentation for more details.
来自Mockito.RETURNS_DEEP_STUBS:
Verification only works with the last mock in the chain. You can use verification modes.
[...]
when(person.getAddress(anyString()).getStreet().getName()).thenReturn("deep");
[...]
inOrder.verify(person.getAddress("the docks").getStreet(), times(1)).getName();
所以,我认为,为了让你的验证工作,你必须将你的模拟改写成这样的东西:
@Mock
SandBox mockSandBox;
@Mock
Sand mockSand;
@Test
public void should()
{
when( mockSand.doA() ).thenReturn( 1 );
when( mockSand.doB() ).thenReturn( 1 );
when( mockSand.doC() ).thenReturn( 1 );
when( mockSandBox.getSand() ).thenReturn( mockSand );
DeepSand deepSand = new DeepSand( mockSandBox );
deepSand.getTipple();
verify( mockSandBox, times( 1 ) ).getSand();
}
或者只验证doA,doB和doC的调用,而不验证getSand()的调用。 - 这取决于你想在这里测试什么。
答案 2 :(得分:0)
来自文件: “Verification API不支持'链接',因此深度存根不会改变验证方式。”
来源:http://mockito.googlecode.com/svn/tags/1.8.3/javadoc/org/mockito/Mockito.html#RETURNS_DEEP_STUBS