Java 例外：mockito 想要但未调用，实际上与此模拟的交互为零
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Exception : mockito wanted but not invoked, Actually there were zero interactions with this mock
提问by user3096719
I have interface
我有接口
Interface MyInterface {
myMethodToBeVerified (String, String);
}
And implementation of interface is
接口的实现是
class MyClassToBeTested implements MyInterface {
myMethodToBeVerified(String, String) {
…….
}
}
I have another class
我还有一堂课
class MyClass {
MyInterface myObj = new MyClassToBeTested();
public void abc(){
myObj.myMethodToBeVerified (new String(“a”), new String(“b”));
}
}
}
I am trying to write JUnit for MyClass. I have done
我正在尝试为 MyClass 编写 JUnit。我已经做好了
class MyClassTest {
MyClass myClass = new MyClass();
@Mock
MyInterface myInterface;
testAbc(){
myClass.abc();
verify(myInterface).myMethodToBeVerified(new String(“a”), new String(“b”));
}
}
But I am getting mockito wanted but not invoked, Actually there were zero interactions with this mockat verify call.
但是我得到了 想要的模拟但没有被调用，实际上在验证调用时与这个模拟的交互为零。
can anyone suggest some solutions.
任何人都可以提出一些解决方案。
回答by Jk1
You need to inject mock inside the class you're testing. At the moment you're interacting with the real object, not with the mock one. You can fix the code in a following way:
您需要在您正在测试的类中注入模拟。目前您正在与真实对象交互，而不是与模拟对象交互。您可以通过以下方式修复代码：
void testAbc(){
myClass.myObj = myInteface;
myClass.abc();
verify(myInterface).myMethodToBeVerified(new String("a"), new String("b"));
}
although it would be a wiser choice to extract all initialization code into @Before
尽管将所有初始化代码提取到 @Before
@Before
void setUp(){
myClass = new myClass();
myClass.myObj = myInteface;
}
@Test
void testAbc(){
myClass.abc();
verify(myInterface).myMethodToBeVerified(new String("a"), new String("b"));
}
回答by Kevin Welker
@Jk1's answer is fine, but Mockito also allows for more succinct injection using annotations:
@Jk1 的回答很好，但 Mockito 还允许使用注释进行更简洁的注入：
@InjectMocks MyClass myClass; //@InjectMocks automatically instantiates too
@Mock MyInterface myInterface
But regardless of which method you use, the annotations are not being processed (not even your @Mock) unless you somehow call the static MockitoAnnotation.initMocks()or annotate the class with @RunWith(MockitoJUnitRunner.class).
但是无论您使用哪种方法，都不会处理注释（甚至不是您的@Mock），除非您以某种方式调用静态MockitoAnnotation.initMocks()或使用@RunWith(MockitoJUnitRunner.class).
回答by Dawood ibn Kareem
Your class MyClasscreates a new MyClassToBeTested, instead of using your mock. My article on the Mockito wikidescribes two ways of dealing with this.
您的班级MyClass创建了一个 new MyClassToBeTested，而不是使用您的模拟。 我在 Mockito wiki 上的文章描述了两种处理方法。
回答by vijaya kumar
@jk1 answer is perfect, since @igor Ganapolsky asked, why can't we use Mockito.mock here? i post this answer.
@jk1 的回答很完美，既然@igor Ganapolsky 问，为什么我们不能在这里使用 Mockito.mock？我发布这个答案。
For that we have provide one setter method for myobj and set the myobj value with mocked object.
为此，我们为 myobj 提供了一个 setter 方法，并使用模拟对象设置 myobj 值。
class MyClass {
MyInterface myObj;
public void abc() {
myObj.myMethodToBeVerified (new String("a"), new String("b"));
}
public void setMyObj(MyInterface obj)
{
this.myObj=obj;
}
}
In our Test class, we have to write below code
在我们的 Test 类中，我们必须编写以下代码
class MyClassTest {
MyClass myClass = new MyClass();
@Mock
MyInterface myInterface;
@test
testAbc() {
myclass.setMyObj(myInterface); //it is good to have in @before method
myClass.abc();
verify(myInterface).myMethodToBeVerified(new String("a"), new String("b"));
}
}
