BleCharacteristicNotFoundException when mocking characteristic write with MockRxAndroidBle

Summary

I posted this issue to StackOverflow but haven’t received any responses. There are more details there, but the main issue is that an exception is being thrown when attempting to write to a characteristic using MockRxAndroidBle.

Example code that reproduces this issue can be found in this gist

Library version

1.3.2, 1.3.3

Actual result

BleCharacteristicNotFoundException is thrown.

Expected result

The write operation is mocked successfully.

[dariuszseweryn]

Unfortunately it is not possible to solve without fully wrapping the Android API in the library. Currently the Android API is visible in the Library API — we have started internal discussion on wether / how to fully enclose the Android API.

The Mock Library was initially (at least by me) considered to be a drop-in replacement for in-app usage — not for using in tests but @uKL has memories that suggest it should work also in the tests.

Bottom line — in the current state the Mock Library will not work correctly if the Android sources are not available. A potential workaround is to use Robolectric in the tests. We are considering an API that will fully enclose the Android API and would make it possible to use the Mock Library virtually everywhere.

[dariuszseweryn]

I agree - this is misleading. We will add the note and we are evaluating an idea to enhance the new API proposition #239 to wrap the Android API fully - it would allow to use the mock library in the unit tests without the need of Robolectric.