metadata.json: No such file or directory

[PawelKwiecinski]

I'm trying to add screenshot testing using screenshot-tests-for-android and ran into an issue where I cannot get it to work. The error I get:

ls: /sdcard/screenshots/com.xyz.test/screenshots-default/metadata.json: No such file or directory
ls: /data/data/com.xyz.test/app_screenshots-default/metadata.json: No such file or directory

The tests live is a library module. Test uses androidx.fragment.app.testing.launchFragmentInContainer, then waits for it and calls Screenshot.snapActivity(fragment.activity!!). I use a custom test runner configured exactly as in the docs to call onCreate + onDestroy. Tests Use Junit4 + Espresso. The screenshot files themselves get generated, saved and pulled correctly. But the whole thing fails because of the missing metadata.

Things I've tried:

• with/without orchestrator
• check logcat (nothing related to the issue there)
• use snap(fragment!!.view) -> same issue
• add all the test data by hand using setName(), etc
• use different API level emulators: 28,29,27
• make sure both lib AndroidManifest.xml and test AndroidManifest.xml have WRITE_EXTERNAL_STORAGE permission
• probably couple other things I've forgot

[oradkovsky]

With what I believe is a similar setup (aar + sample app), I ended up putting tests into sample app. My manifest under sample/androidTest not only has WRITE_EXTERNAL_STORAGE, but also package (ending with test) and android:sharedUserId (ending with uid) - something sample app also has in its manifest. The above works for me under API28. APIs beyond come with scoped storage, but it's another story.

[xiphirx]

This typically indicates that you're not calling flush() appropriately like so:

screenshot-tests-for-android/core/src/main/java/com/facebook/testing/screenshot/ScreenshotRunner.java

Line 53 in f22eab6

ScreenshotImpl.getInstance().flush();