[Android]Checking Android Testing Support Library 1.0

update: Aug 9, 2017

I encountered no tests found error when running tests with AssertJ and AndroidJUnitRunner1.0.0.
https://stackoverflow.com/questions/45402645/instrumented-tests-failure-with-androidjunitrunner-1-0-0-and-assertj

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A few days ago, Android Testing Support Library 1.0 was released.
I pick up some awesome stuff for me, and I think this release will help enhance test automation for other 3rd party libraries.

• https://android-developers.googleblog.com/2017/07/android-testing-support-library-10-is.html
• https://developer.android.com/topic/libraries/testing-support-library/release-notes.html

IdlingResources

• https://developer.android.com/reference/android/support/test/espresso/IdlingRegistry.html
  • com.android.support.test.espresso:espresso-idling-resource:3.0.0

help synchronise against

• Executors
  • com.android.support.test.espresso.idling:idling-concurrent:3.0.0
• network requests and responses
  • com.android.support.test.espresso.idling:idling-net:3.0.0

New view matchers/actions/methods

• Read the release note:
  • https://developer.android.com/topic/libraries/testing-support-library/release-notes.html

Parameterised testing

• JUnitParams for Parameterised test based on AndroidJUnitTestRunner
  • https://github.com/Pragmatists/JUnitParams
    • Quickstart: https://github.com/Pragmatists/junitparams/wiki/Quickstart
  • ParameterizedRobolectricTestRunner is for Robolectic
  • https://github.com/junit-team/junit4/wiki/parameterized-tests haven’t supported yet.
    • But, I think JUnitParams is enough for an alternative solution.

GrantPermissionRule

• Make Espresso test easy especially permission grant related feature.
  • We can control the permissions in source code level
  • https://developer.android.com/reference/android/support/test/rule/GrantPermissionRule.html

Understand how to write/think test for Android

• https://developer.android.com/training/testing/index.html
  • Testing sections come to developer.android.com.
  • We can see many helpful tools such as dumpsys from there.

Android Test Orchestrator

• https://developer.android.com/training/testing/junit-runner.html#using-android-test-orchestrator

Runner related command options

• -e classLoader – Provide the ability to pass class loaders using runner args
• -e filter – Add support for custom JUnit filters to be specified using runner args
• -e runnerBuilder – Allows developers to provide their own implementations of RunnerBuilder that can determine whether and how they can run against a specific class