add srain_piezo of WS90 for rain state detection

[dkadioglu]

Adds rain state detection, which is available since GW2000 firmware 3.1.5

Fixes #1102

Checklist:

• Confirm that one or more new tests are written for the new functionality.
• Run tests and ensure everything passes (with 100% test coverage).
• Update README.md with any new documentation.

[dkadioglu]

What tests should I implement for srain_piezo to achieve successful checks?

[bachya]

What tests should I implement for srain_piezo to achieve successful checks?

I would take a look at these tests as inspiration: #1115 (comment)

[dkadioglu]

What tests should I implement for srain_piezo to achieve successful checks?

I would take a look at these tests as inspiration: #1115 (comment)

Thank you for giving me some hint. However, this link seems to be wrong.

[bachya]

What tests should I implement for srain_piezo to achieve successful checks?

I would take a look at these tests as inspiration: #1115 (comment)

Thank you for giving me some hint. However, this link seems to be wrong.

Apologies! https://github.com/bachya/ecowitt2mqtt/blob/dev/tests/data/test_data_processing.py

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (cbbe355) to head (46ce90e).
Report is 2 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff            @@
##               dev     #1115   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           32        33    +1     
  Lines         1775      1789   +14     
=========================================
+ Hits          1775      1789   +14     

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[dkadioglu]

It took me some time familiarising with pytest and the CI pipeline. I hope, my implementation is appropriate. From my point of view, this should be ready to merge, please check.

[bachya]

Looks great! Thanks so much!