Issue in Home Screen RecyclerView test

[fknives]

Describe the bug An issue occurred when testing Home screen's RecyclerView

Logs Emulator-Test-Results-21.zip

Additional context Emulator 21

[fknives]

JVM Test Results.zip

[fknives]

Emulator Looks like some kind of synchronisation issue: Emulator-Test-Results-21.zip Emulator-Logcat-Logs-21.zip

The views are being animated out, so they still somewhat show when checking ^^

Robolectric Similar thing in JVM, the TextView is not yet showed. JVM Test Results.zip

[fknives]

After investigations, it seems to boil down to 2 issues:

• ItemAnimator of RecyclerView should be turned off so animations won't affect the Tests
• Retrofit is Dispatching Errors on Dispatchers.Default, which is a race condition between the TestTread and the Dispatching.

ItemAnimator The solution for here should be straight forward, via Espresso Remote the itemAnimator before checking the RecyclerView.

Retrofit race condition Since we cannot yet Replace Dispatchers.Default in tests, the best course of action for now, is to simply have a delay in the OkHttpIdling resource. It's documentation should describe why it's necessary and include the specific issues:

• section fo the code in Retrofit
• issue to replace Dispatchers.Default in tests. Note: This is not a bug in Retrofit, they arrived to this solution since in non-test environment (or in runTest), this is completely fine. They need to suspend the request coroutine in order to throw the Checked Exceptions without that being wrapped. They use the recommended approach.