[PR #11546/92dee75 backport][3.13] Refactor websocket frame compression tests in test_websocket_writer

[Cycloctane]

(cherry picked from commit 92dee75)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.13%. Comparing base (b348b0b) to head (cc54e6e).
⚠️ Report is 8 commits behind head on 3.13.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.13   #11556   +/-   ##
=======================================
  Coverage   98.12%   98.13%           
=======================================
  Files         128      128           
  Lines       43680    43688    +8     
  Branches     2383     2383           
=======================================
+ Hits        42863    42872    +9     
  Misses        635      635           
+ Partials      182      181    -1     

Flag	Coverage Δ
CI-GHA	98.02% <100.00%> (+<0.01%)	⬆️
OS-Linux	97.78% <100.00%> (+<0.01%)	⬆️
OS-Windows	95.47% <100.00%> (+<0.01%)	⬆️
OS-macOS	96.99% <100.00%> (-0.01%)	⬇️
Py-3.10.11	96.64% <100.00%> (+<0.01%)	⬆️
Py-3.10.18	97.15% <100.00%> (+<0.01%)	⬆️
Py-3.11.13	97.34% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	96.83% <100.00%> (-0.01%)	⬇️
Py-3.12.10	96.93% <100.00%> (+<0.01%)	⬆️
Py-3.12.11	97.43% <100.00%> (+<0.01%)	⬆️
Py-3.13.7	97.66% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	96.54% <100.00%> (+<0.01%)	⬆️
Py-3.9.23	97.05% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.16	89.79% <100.00%> (+0.13%)	⬆️
VM-macos	96.99% <100.00%> (-0.01%)	⬇️
VM-ubuntu	97.78% <100.00%> (+<0.01%)	⬆️
VM-windows	95.47% <100.00%> (+<0.01%)	⬆️

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[codspeed-hq]

CodSpeed Performance Report

Merging #11556 will not alter performance

_{Comparing Cycloctane:patchback/backports/3.13/92dee75c51badcceab2b6dc85ed36e028c08cd46/pr-11546 (cc54e6e) with 3.13 (b348b0b)¹}

Summary

✅ 59 untouched

Footnotes

1. No successful run was found on 3.13 (d8f0d03) during the generation of this report, so b348b0b was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩