JUnit 4 + Android: Friends 4 Eva (AndroidListener Chicago, May 2015)

A quick look at the benefits of using the Android JUnit4 runner. Links to code and other fun stuff at the end!

Transcript

1. JUnit4 +
   Android:
   Friends 4 Eva
   Ellen Shapiro
   AndroidListener Chicago, May 2015
   

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2. JUnit4: What is?
   — A huge, open-source testing library for Java
   — Has subclassable test runners
   

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3. Testing: Ye Olde Way
   — ActivityInstrumentationTestCase2extends Activity>
   — Name of method to be tested starts with test
   — If something is temporarily broken, either delete it or
   comment it out.
   — Testing different data requires a separate test calling
   a private helper.
   

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4. Testing: Ye JUnit4 Way
   — Uses annotations instead of naming conventions
   — Allows tests to be marked as ignored
   — Runner has subclasses allowing all sorts of fancy
   things
   — Allows you to have tests skipped based on an
   assumption*
   

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5. Testing: Ye JUnit4 Way
   — Uses annotations instead of naming conventions
   — Allows tests to be marked as ignored
   — Runner has subclasses allowing all sorts of fancy
   things
   — Allows you to have tests skipped based on an
   assumption*
   * - in theory
   

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6. JUnit4 Benefits
   — Tests don't reference an activity unless they need to
   — Name things in a way that makes sense to YOU
   — Run the same test many times with different params
   

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7. JUnit4 Drawbacks
   — Assume handling is not presently working.
   — FlakyTest does not work with JUnit4 tests.
   — You have to static import a lot more stuff.
   

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8. DEMO
   

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9. Question Time!
   

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10. Links Galore!
    — AndroidListenerExamples: https://github.com/
    designatednerd/AndroidListenerExamples
    — User Guide: https://code.google.com/p/android-test-
    kit/wiki/AndroidJUnitRunnerUserGuide
    — Google Sample: https://github.com/googlesamples/
    android-testing/tree/master/testrunner/
    AndroidJunitRunnerSample
    — JUnit Docs: http://junit.org/javadoc/latest/
    index.html
    

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