Automated Tests for Android apps

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Automated Tests for Android apps

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Who is that guy ?
Clement Quaquin
Twitter : @openkwaky
Android Lead developer @Equasoft
5 years XP in Android app development
Apps : Xivo / SmartGPS / FdjScan / EuroMillions /
Who am I ? / Chanel UV / Kurio Store / Darty Store /
France Bleu / Rating Reminder lib / ...

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Why writing Tests ?
● Minimize regressions
● Optimize testing time by iteration
● Improve code quality
#qualitymatters
● Monitor performance
● TDD

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Test levels
Test levels for an app :
● Unit test (independant and modular code)
● Integration test (code inspection)
● Functionnal test (check user stories)
● Acceptance test (check project's compliance to
initial requests)

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Test levels
Android tests
Local unit tests
(on JVM)
in src/test
Instrumentation tests
(require Android device)
in src/androidTest

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Unit tests
● Test small modular code
● Should be fast (<100ms by test)
● Not dependant of a device
● Run in JVM

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Unit tests
JUnit
● facilitates the automated tests writing
● provides useful verification methods :
assertEquals()
assertFalse()
assertNull()
assertNotNull()
assertSame()
assertNotSame()
assertTrue()

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Unit tests
JUnit : check your objects and methods

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Instrumented Unit tests : Mockito
Create fake objects behaviour

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Instrumented Unit tests : Mockito
Verify object's calls
… Rolling !!!

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Ui tests
● Test screens UI behaviour
● Check user's interactions
● Define UI scenarios

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Ui tests : JUnit & Espresso
Espresso
● simulates user's clicks, swipes and
more
● checks view's status and presence
● allows multi-activities scenarios

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Ui tests : Espresso
● ActivityTestRule launches a starting activity for
the tests
● ServiceTestRule allows calls to a service
(startService, StopService, etc)

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Ui tests : Espresso
● onView selects a view in the current screen by id
or text displayed
● onData selects a view controlled by an adapter
in the current screen (ListView)
● perform makes an action on a view (click)
● check checks status of a view

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Ui tests : Espresso

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Ui tests :
ActivityInstrumentationTestCase2
ActivityInstrumentationTestCase2
● References the activity to test
● Used for more advanced tests on views
● Allows to test views properties

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Ui tests : ActivityInstrumentationTestCase2

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Ui tests :
ActivityInstrumentationTestCase2

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Ui tests : Run

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Refs
Unit tests :
http://developer.android.com/training/testing/unit-testing/local-unit-tests.html
http://www.vogella.com/tutorials/AndroidTesting/article.html
http://site.mockito.org/mockito/docs/current/org/mockito/Mockito.html
UI tests with Espresso :
http://developer.android.com/training/testing/ui-testing/espresso-testing.html
http://www.vogella.com/tutorials/AndroidTestingEspresso/article.html
https://github.com/vgrec/EspressoExamples
#qualitymatters
http://artemzin.com/blog/android-development-culture-the-document-qualitymatters/
Demo UI tests for France Bleu app :
https://youtu.be/GofurEVYvbo

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Questions ?
Thank you !