Need help to write a unit test using Mockito and JUnit4

Question

Need help to write a unit test for the below code using Mockito and JUnit4,

public class MyFragmentPresenterImpl { 
      public Boolean isValid(String value         


        

Answer 1

add this line in your gradle file in case of Android Studio.

android{
....
 testOptions {
        unitTests.returnDefaultValues = true
 }
}