Exception mockito wanted but not invoked Actually there were zero interactions with this mock

Question

I have interface  Interface MyInterface     myMethodToBeVerified  String  String       And implementation of interface is  class MyClassToBeTested implements MyInterface      myMethodToBeVerified String  String                         I have another class  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   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 mock at verify call   can anyone suggest some solutions

User · Answer

Your class MyClass creates a new MyClassToBeTested  instead of using your mock   My article on the Mockito wiki describes two ways of dealing with this

User · Answer

jk1 answer is perfect  since  igor Ganapolsky asked  why can t we use Mockito mock here  i post this answer   For that we have provide one setter method for myobj and set the myobj value with mocked object   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  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

User · Answer

Jk1 s answer is fine  but Mockito also allows for more succinct injection using annotations    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

User · Answer

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   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   Before void setUp         myClass   new myClass         myClass myObj   myInteface      Test void testAbc         myClass abc         verify myInterface  myMethodToBeVerified new String  a    new String  b

[java] Exception : mockito wanted but not invoked, Actually there were zero interactions with this mock

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