Can I print an information message in JUnit tests?

JUnit tests are not executed on a Android device (or emulator) but on Java Virtual Machine on PC's environment. You have two solution:

• Just use some Logger (like log4j, JDK logger, etc) or simply use System.out.
• Use Roboletric and its capability to define shadow classes to redefine Log class.

I suggest you the second way. Roboletric already have a shadow class for log. To redirect output into console

 @Before
 public void setUp() throws Exception {
      ShadowLog.stream = System.out;
      //you other setup here
 }

Some references:

https://guides.codepath.com/android/Unit-Testing-with-Robolectric https://github.com/robolectric/robolectric-samples http://www.vogella.com/tutorials/Robolectric/article.html

I hope it helps.

The old fashioned Java styled System.out.println(); will work.