test: assert family/proto/flags on mDNS ResolveResults

[aiolibsbot]

What

Add a focused test file asserting the family, proto and flags fields of the ResolveResult entries produced by the mDNS resolvers.

Why

_to_resolve_result sets six fields, but the suite only ever asserted hostname/host/port. The family field is the subtle one: it is derived from the resolved address version (_IP_VERSION_TO_FAMILY[ip.version]), not from the family passed to resolve(). aiohttp opens its sockets based on this per-result family, so an AF_UNSPEC lookup returning a mix of IPv4/IPv6 addresses must tag each result individually. A refactor that echoed the query family (or hardcoded proto/flags) would silently misroute connections while all existing tests still passed.

How

New file tests/test_resolve_result_fields.py (kept separate to avoid churn against in-flight test PRs). It reuses the established patchable-resolver pattern from test_impl.py:

• test_unspec_result_family_follows_address_version — AF_UNSPEC + mixed v4/v6 → [AF_INET, AF_INET6].
• test_ipv4_result_socket_fields / test_ipv6_result_socket_fields — per-family family, proto == 0, flags == AI_NUMERICHOST | AI_NUMERICSERV.

Testing

python -m py_compile + ruff check pass. The mocks mirror the existing passing test_resolve_mdns_name_af_inet/unspec tests exactly, adding only assertions on the previously-unasserted fields. (The full pytest suite needs zeroconf/aiodns, which aren't installable in this environment — CI exercises it.)

🤖 Generated with Claude Code

---

Quality Report

Changes: 2 files changed, 135 insertions(+)

Code scan: clean

Tests: failed (FAILED)

Branch hygiene: clean

Generated by Kōan post-mission quality pipeline

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (5a01499) to head (294b369).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Files            6         7    +1     
  Lines          521       566   +45     
  Branches        23        23           
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+ Hits           521       566   +45     

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