java - Unit testing with Mockito resets a mocked class' instance variable to null -

java - Unit testing with Mockito resets a mocked class' instance variable to null -

i have mocked message class follows (within testng unit test class):

@beforemethod protected void setup() { message = mock(message.class); }

i can assure have declared message of type message in unit test class. now, message class has instance variable called category of type string follows:

public class message { private string category; public string getcategory() { homecoming category; } public void setcategory(string category) { this.category = category; } }

okay, problem: within little test method, have set category of mocked message instance , utilize category task in unit test. however, after set category mocked message, reverts null again. code:

public void shouldsendmessageswithcategory() { message.setcategory("f1 racing"); // set category raceresults.addsubscriber("f1 racing", clienta); system.out.println("cat" + message.getcategory()); // message's category null raceresults.send(message); verify(clienta).receive(message); }

the console prints out null - know it's null. i've been trying figure out 2 days, seems i'm missing something. help appreciated.

you can utilize spy() instead of mock(). can maintain set value. have option. can utilize doreturn("f1 racing").when(message).getcategory(); homecoming value want return.

java unit-testing mocking testng mockito