[test-improver] Add unit tests for HangDump named-pipe serializers

Goal and rationale

src/Platform/Microsoft.Testing.Extensions.HangDump/Serializers/ contains four named-pipe serializer types (ActivitySignalRequestSerializer, ConsumerPipeNameRequestSerializer, GetInProgressTestsRequestSerializer, GetInProgressTestsResponseSerializer) that had zero direct serializer-level test coverage — only incidental exercise via higher-level integration-style flows. This mirrors a gap previously closed for the Retry extension's IPC serializers (see RetrySerializersTests.cs), and was flagged as the next candidate in the testing backlog.

Approach

Added HangDumpSerializersTests.cs with round-trip tests for each serializer:

ActivitySignalRequest — singleton instance round-trip (empty payload).
ConsumerPipeNameRequest — pipe name string round-trip.
GetInProgressTestsRequest — empty-record serialize/deserialize.
GetInProgressTestsResponse — multiple entries, empty array, and a Unicode test-name edge case.

Since NamedPipeSerializer<T>/INamedPipeSerializer are [Embedded] linked-source types (each consuming project compiles its own private copy), the test helper invokes the non-public Serialize/Deserialize instance methods via reflection — the same pattern used in RetrySerializersTests.cs.

Coverage impact

Metric	Before	After
`Microsoft.Testing.Extensions.UnitTests` (net9.0) total tests	2075	2081
Failed	0	0
Skipped	51	51 (pre-existing)

Trade-offs

Small, focused addition (6 tests, 1 new file). No production code changes, no new dependencies.

Reproducibility

./build.sh -restore
export PATH="$PWD/.dotnet:$PATH"
dotnet build test/UnitTests/Microsoft.Testing.Extensions.UnitTests/Microsoft.Testing.Extensions.UnitTests.csproj -c Debug
./artifacts/bin/Microsoft.Testing.Extensions.UnitTests/Debug/net9.0/Microsoft.Testing.Extensions.UnitTests

Test Status

Build: succeeded, 0 warnings, 0 errors.
Full Microsoft.Testing.Extensions.UnitTests net9.0 suite: 2081 total (was 2075), 0 failed, 51 skipped (pre-existing), no regressions.
dotnet format whitespace --verify-no-changes: clean (F# project warning is expected/harmless).

Note

This was originally intended as a pull request, but the git push operation failed.

Original error: The process '/usr/bin/git' failed with exit code 128

Workflow Run: View run details and download bundle artifact

The bundle file is available in the agent artifact in the workflow run linked above.

Create the pull request manually

# Download the artifact from the workflow run
gh run download '37162750314' -n agent -D '/tmp/agent-37162750314'

# Resolve the bundle source ref, fetch it into a temporary ref, then create the local branch
bundle_path='/tmp/agent-37162750314/aw-test-assist-hangdump-serializer-tests.bundle'
temp_ref='refs/bundles/create-pr-test-assist-hangdump-serializer-tests-4145de75c9a1d0d9-e18395dc'
target_ref='refs/heads/test-assist/hangdump-serializer-tests-4145de75c9a1d0d9'
bundle_source_ref=$(git bundle list-heads "$bundle_path" | awk '$2 ~ /^refs\/heads\// { print $2 }')
if [ -z "$bundle_source_ref" ]; then
  bundle_source_ref=$(git bundle list-heads "$bundle_path" | awk '$2 == "HEAD" { print $2 }')
fi
if [ "$(printf '%s\n' "$bundle_source_ref" | sed '/^$/d' | wc -l | tr -d ' ')" != "1" ]; then
  echo "Expected exactly one bundle source ref, found: $bundle_source_ref" >&2
  exit 1
fi
git fetch "$bundle_path" "${bundle_source_ref}:${temp_ref}"
git update-ref "$target_ref" "$temp_ref"
git checkout 'test-assist/hangdump-serializer-tests-4145de75c9a1d0d9'
# Ensure the working tree matches the updated branch
git reset --hard
# Remove the temporary bundle ref
git update-ref -d "$temp_ref"

# Push the branch to the target remote
git push 'origin' 'test-assist/hangdump-serializer-tests-4145de75c9a1d0d9'

# Create the pull request
gh pr create --title '[test-improver] Add unit tests for HangDump named-pipe serializers' --base 'main' --head 'test-assist/hangdump-serializer-tests-4145de75c9a1d0d9' --repo 'microsoft/testfx'

Warning

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[test-improver] Add unit tests for HangDump named-pipe serializers #11735

Goal and rationale

Approach

Coverage impact

Trade-offs

Reproducibility

Test Status

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[test-improver] Add unit tests for HangDump named-pipe serializers #11735

Description

Goal and rationale

Approach

Coverage impact

Trade-offs

Reproducibility

Test Status

Activity

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions