A short introduction why Robolectric will make testing more fun on Android and how to set it up in Eclipse.

1. Bring Back the Fun to
Testing Android Apps
with Robolectric
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

2. Bring Back the Fun to
Testing Android Apps
with Robolectric
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

3. Testing Android Apps with Robolectric
What’s the problem?
Why is Robolectric a solution?
Demo
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

4. What’s the problem?
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

5. What’s the problem?
Running tests requires:
•
Dexing Dexing
•
Packaging Packaging
•
Installation on device / emulator Installation
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

6. Dexing
Packaging
Peter Friese - @peterfriese - http:/
/www.peterfriese.de
Installation

7. Robolectric to the rescue!
Run tests in a regular JVM, not on Dalvik VM
•
Dexing
•
Packaging
•
Installation on device / emulator
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

8. There is another problem…
protected void onCreate(Bundle savedInstanceState) {
throw new RuntimeException("Stub!");
}
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

9. Robolectric Solution:
Shadow Objects
•
Intercept class loading
•
Rewrite method bodies (using ASM)
•
Intercept calls to Android classes, record state
in shadow classes
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

10. FEST - Readability for Your Tests
Plain JUnit:
assertEquals(View.GONE, textView.getVisibility());
!
java.lang.AssertionError: expected:<8> but was:<0>
FEST:
assertThat(textView).isGone();
!
java.lang.AssertionError: Expected to be gone but was visible
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

11. Demo
See http:/
/www.peterfriese.de/unit-testing-android-apps-with-robolectric-and-eclipse/ for a
step-by-step description of how to set up Robolectric in Eclipse
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

12. Electrified? Here’s where to get Robolectric / FEST
Web: http:/
/ww.robolectric.org
Github: https:/
/github.com/robolectric/robolectric
Peter Friese - @peterfriese - http:/
/www.peterfriese.de
Web: http:/
/square.github.io/fest-android/
Github: https:/
/github.com/square/fest-android

13. Contact
Peter Friese
ter.friese@zuhlke.com
pe
!
td
Zuhlke Engineering L
43 Whitfield St
London
W1T 4HD
!
+44 7825 688 244
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

14. Image credits
•
Snail - http:/
/www.wallsfeed.com/snail-journey-leaf/
Peter Friese - @peterfriese - http:/
/www.peterfriese.de

15. The End