Bring Back the Fun to Testing Android Apps with Robolectric
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Peter Friese - @peterfriese - http://www.peterfriese.de Bring Back the Fun to Testing Android Apps with Robolectric
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A short introduction why Robolectric will make testing more fun on Android and how to set it up in Eclipse.
Transcript of Bring Back the Fun to Testing Android Apps with Robolectric
Peter Friese - @peterfriese - http://www.peterfriese.de
Bring Back the Fun to Testing Android Apps
with Robolectric
Peter Friese - @peterfriese - http://www.peterfriese.de
Bring Back the Fun to Testing Android Apps
with Robolectric
Peter Friese - @peterfriese - http://www.peterfriese.de
Testing Android Apps with Robolectric
What’s the problem?
Why is Robolectric a solution?
Demo
Peter Friese - @peterfriese - http://www.peterfriese.de
What’s the problem?
Peter Friese - @peterfriese - http://www.peterfriese.de
What’s the problem?
Running tests requires:
• Dexing
• Packaging
• Installation on device / emulator
Dexing
Packaging
Installation
Peter Friese - @peterfriese - http://www.peterfriese.de
Dexing Packaging Installation
Peter Friese - @peterfriese - http://www.peterfriese.de
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
There is another problem…
protected void onCreate(Bundle savedInstanceState) { throw new RuntimeException("Stub!"); }
Peter Friese - @peterfriese - http://www.peterfriese.de
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
FEST - Readability for Your Tests
assertEquals(View.GONE, textView.getVisibility()); !java.lang.AssertionError: expected:<8> but was:<0>
Plain JUnit:
assertThat(textView).isGone(); !java.lang.AssertionError: Expected to be gone but was visible
FEST:
Peter Friese - @peterfriese - http://www.peterfriese.de
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
Electrified? Here’s where to get Robolectric / FEST
Web: http://ww.robolectric.org Github: https://github.com/robolectric/robolectric
Web: http://square.github.io/fest-android/ Github: https://github.com/square/fest-android
Peter Friese - @peterfriese - http://www.peterfriese.de
Contact
Peter [email protected]
!Zuhlke Engineering Ltd43 Whitfield StLondonW1T 4HD!+44 7825 688 244
Peter Friese - @peterfriese - http://www.peterfriese.de
Image credits
• Snail - http://www.wallsfeed.com/snail-journey-leaf/
The End
