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

This is a known issue, due to a clause in Testing Fundamental of Android which says:

You can use the JUnit TestCase class to do unit testing on a class that does not call Android APIs.

The default behavior is problematic when using classes like Log or TextUtils.

To sum up:

1. android.jar is mock before, so some Android API return value may not be as expected.
2. JUnit itself is a single measure for the java code, so try not to use the Android API methods.

Source: http://www.liangfeizc.com/2016/01/28/unit-test-on-android/