androidx.arch.core:core-testing

Official Description: Android Core-Testing

CommonsWare’s Notes

This artifact provides InstantTaskExecutorRule. That can be used from JUnit-based tests to replace the Architecture Components’ standard Executor with one that runs everything on the current thread. This turns formerly asynchronous operations into synchronous ones, which streamlines testing. InstantTaskExecutorRule is good for testing LiveData, particularly when returned from Room.

Documentation

• Release Notes
• Android Testing Codelab

Knowledge

• Testing LiveData in JUnit 4 and JUnit 5 (2019-01-17)
• Effective LiveData and ViewModel Testing (2018-06-30)
• Testing ViewModel in MVVM using LiveData and RxJava

Samples

• Exploring Android: CommonsWare’s hands-on tutorial book uses InstantTaskExecutorRule in its tests
• Basic RxJava Samples (Java): Uses InstantTaskExecutorRule in both instrumented and unit tests
• Basic RxJava Samples (Kotlin): Same sample as above, converted to Kotlin

Versions

• Latest Stable: 2.1.0
• Latest Release Candidate: 2.1.0-rc01
• Latest Beta: 2.1.0-beta01
• Latest Alpha: 2.1.0-alpha02

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• 2.1.0
• 2.1.0-rc01
• 2.1.0-beta01
• 2.1.0-alpha02
• 2.1.0-alpha01
• 2.0.1
• 2.0.0
• 2.0.0-rc01
• 2.0.0-beta01
• 2.0.0-alpha1