Add initial unit tests to the proxy

[Nexarian]

Summary

Initial unit test, as simple as I could get it. Unfortunately, it does require some modifications to the proxy to get working.

First unit test chosen because it's easy and closed-scope: The stats endpoints.

Biggest problem: The code in the proxy is no longer fully compatible with Python 3.8: https://indhumathychelliah.com/2020/10/12/new-string-methods-to-remove-prefixes-and-suffixes-in-python-3-9/

The do_GET handler uses removeprefix. This was already merged, so the proxy has been broken on 3.8 for a while. This tells me that we can justifiably drop it. Clearly nobody was actually using this with Python 3.8 any longer, otherwise we'd have gotten bug reports.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.52%. Comparing base (086554b) to head (e765a00).
⚠️ Report is 5 commits behind head on main.
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #216      +/-   ##
==========================================
+ Coverage   27.29%   27.52%   +0.23%     
==========================================
  Files          35       35              
  Lines        5400     5413      +13     
  Branches      779      752      -27     
==========================================
+ Hits         1474     1490      +16     
+ Misses       3856     3846      -10     
- Partials       70       77       +7     

Flag	Coverage Δ
py3.10	27.52% <ø> (+0.23%)	⬆️
py3.11	27.52% <ø> (+0.23%)	⬆️
py3.12	27.52% <ø> (+0.23%)	⬆️
py3.8	?
py3.9	27.54% <ø> (+0.23%)	⬆️

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[Nexarian]

@jasonacox This is ready for you to take a look at.

[Copilot]

Pull Request Overview

This PR adds initial unit tests for the proxy component, focusing on the stats endpoints as a starting point. The changes also drop Python 3.8 support due to incompatibility with the removeprefix method already used in the codebase.

• Add unit tests for /stats and /stats/clear endpoints with mock-based testing infrastructure
• Remove Python 3.8 from CI testing matrix due to existing incompatibility
• Refactor proxy server structure to support testing by adding a main function and fixing import paths

Reviewed Changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 2 comments.

File	Description
pytest.ini	Adds proxy/tests to test discovery paths
proxy/tests/test_do_get.py	New unit test file with comprehensive stats endpoint testing
proxy/server.py	Refactors import path and adds main function for testability
.github/workflows/test.yml	Removes Python 3.8 from CI matrix

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[Nexarian]

@jasonacox Are you the only one who can call for the github copilot review? I looked around to try to find the command/UI option and I didn't see it.

[jasonacox]

@jasonacox Are you the only one who can call for the github copilot review? I looked around to try to find the command/UI option and I didn't see it.

Yes, unfortunately. I do like to run it as it has found some non-obvious bugs. But also gets things worngs too. :)

I made a minor change to this to accomodate my local test harness for the proxy. I suspect others may use it too (to run local vs via container).

[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 6 changed files in this pull request and generated 1 comment.

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[jasonacox]

Thanks for this @Nexarian !

[Nexarian]

You're welcome! As I've mentioned before, the long-term plan here is to have all of "do_GET" unit tested... So that I can then refactor it. Which is a prelude to adding the functionality for multiple inverters/gateways/etc.