test: cover pipes and filters generator hosts

[JerrettDavis]

Summary

• add TinyBDD coverage for PipesAndFilters pipeline defaults, escaped names, abstract/sealed/internal/struct hosts, malformed context arguments, and nested hosts
• harden nested pipeline hosts by emitting containing partial type wrappers before the generated factory method
• raise PipesAndFiltersPipelineGenerator source coverage from 84.2% to 98.8% in the generator-only report

Part of #413.

Validation

• dotnet test test\PatternKit.Generators.Tests\PatternKit.Generators.Tests.csproj --configuration Release --framework net10.0 --filter "FullyQualifiedName~PipesAndFiltersPipelineGeneratorTests" --logger "console;verbosity=minimal"
• dotnet test test\PatternKit.Generators.Tests\PatternKit.Generators.Tests.csproj --configuration Release --no-restore -p:TestTfmsInParallel=false --collect:"XPlat Code Coverage" --results-directory .\TestResults --logger "console;verbosity=minimal" -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Format=cobertura
• dotnet tool run reportgenerator -reports:"TestResults*\coverage.cobertura.xml" -targetdir:"coverage-report-generators" -reporttypes:"TextSummary;Cobertura" -assemblyfilters:"+PatternKit.Generators" -filefilters:"-**/.Tests/;-/Tests/;-/obj/;-/bin/;-**/.g.cs"
• dotnet format PatternKit.slnx --verify-no-changes --verbosity minimal
• dotnet test test\PatternKit.Generators.Tests\PatternKit.Generators.Tests.csproj --configuration Release --no-restore --no-build -p:TestTfmsInParallel=false --logger "console;verbosity=minimal"

[github-actions]

⚠️ Deprecation Warning: The deny-licenses option is deprecated for possible removal in the next major release. For more information, see issue 997.

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[Copilot]

Pull request overview

Adds TinyBDD test coverage for the PipesAndFilters pipeline generator and hardens the generator to correctly emit nested containing type wrappers, raising source coverage from 84.2% to 98.8%.

Changes:

• Emit containing partial type wrappers around the generated factory so nested hosts compile correctly.
• Extract GetContainingTypes and AppendTypeDeclaration helpers (mirroring EventStoreGenerator).
• Add TinyBDD scenarios covering defaults, host shapes, escaped pipeline names, nested accessibility variants, and malformed context arguments.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/PatternKit.Generators/Messaging/PipesAndFiltersPipelineGenerator.cs	Adds nested type wrappers and refactors emission helpers.
test/PatternKit.Generators.Tests/PipesAndFiltersPipelineGeneratorTests.cs	Adds scenarios for defaults, type shapes, nested wrappers, and malformed args.

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[github-actions]

Test Results

    12 files      12 suites   10m 15s ⏱️
 3 623 tests  3 623 ✅ 0 💤 0 ❌
10 880 runs  10 880 ✅ 0 💤 0 ❌

Results for commit 3bed222.

[github-actions]

Code Coverage

Summary
  Generated on: 05/29/2026 - 17:39:53
  Coverage date: 05/29/2026 - 17:37:24 - 05/29/2026 - 17:39:41
  Parser: MultiReport (12x Cobertura)
  Assemblies: 5
  Classes: 1616
  Files: 551
  Line coverage: 95.6%
  Covered lines: 42308
  Uncovered lines: 1917
  Coverable lines: 44225
  Total lines: 95456
  Branch coverage: 77.4% (12581 of 16237)
  Covered branches: 12581
  Total branches: 16237
  Method coverage: 96.4% (8356 of 8662)
  Full method coverage: 89.1% (7726 of 8662)
  Covered methods: 8356
  Fully covered methods: 7726
  Total methods: 8662

PatternKit.Core                                                                                                     95.4%
  PatternKit.Application.ActivityTracking.ActivityGateState                                                          100%
  PatternKit.Application.ActivityTracking.ActivityLease                                                              100%
  PatternKit.Application.ActivityTracking.ActivityRecord                                                             100%
  PatternKit.Application.ActivityTracking.ActivityTracker                                                            100%
  PatternKit.Application.Aggregates.AggregateCommandHandler<T1, T2, T3>                                              100%
  PatternKit.Application.Aggregates.AggregateCommandResult<T>                                                        100%
  PatternKit.Application.Aggregates.AggregateRoot<T1, T2>                                                            100%
  PatternKit.Application.AntiCorruption.AntiCorruptionLayer<T1, T2>                                                 90.4%
  PatternKit.Application.AntiCorruption.AntiCorruptionResult<T>                                                      100%
  PatternKit.Application.AuditLog.AuditLogAppendResult<T>                                                           85.7%
  PatternKit.Application.AuditLog.InMemoryAuditLog<T1, T2>                                                          95.4%
  PatternKit.Application.BoundedContexts.BoundedContextAdapter                                                       100%
  PatternKit.Application.BoundedContexts.BoundedContextCapability                                                   83.3%
  PatternKit.Application.BoundedContexts.BoundedContextDescriptor                                                   95.4%
  PatternKit.Application.ContextMaps.ContextMapDescriptor                                                           96.8%
  PatternKit.Application.ContextMaps.ContextMapRelationship                                                          100%
  PatternKit.Application.DataMapping.DataMapper<T1, T2>                                                             94.6%
  PatternKit.Application.DataMapping.DataMapperError                                                                  90%
  PatternKit.Application.DataMapping.DataMapperResult<T>                                                            84.6%
  PatternKit.Application.DomainEvents.DomainEventDispatcher<T>                                                      95.4%
  PatternKit.Application.DomainEvents.DomainEventDispatchResult                                                      100%
  PatternKit.Application.DomainServices.DomainServiceOperation<T1, T2>                                               100%
  PatternKit.Application.DomainServices.DomainServiceRegistry<T1, T2>                                                100%
  PatternKit.Application.EventSourcing.EventStoreAppendResult                                                        100%
  PatternKit.Application.EventSourcing.InMemoryEventStore<T1, T2>                                                   97.9%
  PatternKit.Application.EventSourcing.StoredEvent<T1, T2>                                                            80%
  PatternKit.Application.FeatureToggles.FeatureToggleDecision                                                       87.5%
  PatternKit.Application.FeatureToggles.FeatureToggleRule<T>                                                         100%
  PatternKit.Application.FeatureToggles.FeatureToggleSet<T>                                                         96.9%
  PatternKit.Application.IdentityMap.IdentityMap<T1, T2>                                                             100%
  PatternKit.Application.IdentityMap.IdentityMapResult<T>                                                           92.8%
  PatternKit.Application.MaterializedViews.MaterializedView<T1, T2>                                                 98.4%
  PatternKit.Application.Repository.InMemoryRepository<T1, T2>                                                      92.8%
  PatternKit.Application.Repository.RepositoryResult<T>                                                             93.3%
  PatternKit.Application.ServiceLayer.ServiceLayerOperation<T1, T2>                                                 96.7%
  PatternKit.Application.ServiceLayer.ServiceLayerResult<T>                                                         94.7%
  PatternKit.Application.ServiceLayer.ServiceLayerRule<T>                                                            100%
  PatternKit.Application.Specification.Specification<T>                                                              100%

[github-actions]

🔍 PR Validation Results

Version: ``

✅ Validation Steps

• Build solution
• Run tests
• Build documentation
• Dry-run NuGet packaging

📊 Artifacts

Dry-run artifacts have been uploaded and will be available for 7 days.

---

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.97%. Comparing base (ba737fb) to head (3bed222).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #424      +/-   ##
==========================================
+ Coverage   90.03%   95.97%   +5.93%     
==========================================
  Files         551      551              
  Lines       44205    44225      +20     
  Branches     6361     6364       +3     
==========================================
+ Hits        39800    42444    +2644     
+ Misses       1924     1781     -143     
+ Partials     2481        0    -2481     

Flag	Coverage Δ
unittests	95.97% <100.00%> (+5.93%)	⬆️

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