test: fix race in test_register_and_lookup_type_by_uppercase_name

[bdraco]

Summary

test_register_and_lookup_type_by_uppercase_name has a long-standing race that surfaced on the PR #1710 CI run for the pypy-3.10 / ubuntu / skip_cython matrix entry. The cache-poll loop:

for _ in range(50):
    time.sleep(0.02)
    info.load_from_cache(zc)
    if info.addresses:
        break
assert info.addresses == [socket.inet_pton(socket.AF_INET, "1.2.3.4")]
assert info.properties == {b"version": b"1.0"}

breaks on the A record landing, but the next assertion checks the TXT record, which arrives via a separate cache update. Under PyPy / skip_cython the listener occasionally schedules the assertions between the two updates, leaving info.properties == {}.

Fix: require both before exiting the loop.

if info.addresses and info.properties:
    break

The race predates and is not specific to PR #1710 — same flakiness class hit a recent master run on a different test (test_service_browser_expire_callbacks).

Test plan

• Targeted test passes locally
• Pre-commit hooks pass

[codspeed-hq]

Merging this PR will not alter performance

✅ 6 untouched benchmarks

---

_{Comparing fix/test-uppercase-lookup-race (e12cd80) with master (4bae30a)}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.76%. Comparing base (4bae30a) to head (e12cd80).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1712   +/-   ##
=======================================
  Coverage   99.76%   99.76%           
=======================================
  Files          33       33           
  Lines        3426     3426           
  Branches      471      471           
=======================================
  Hits         3418     3418           
  Misses          5        5           
  Partials        3        3           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.