dotnet-test-quality
dotnet-test-quality
Test quality analysis for .NET projects. Covers code coverage collection with coverlet, human-readable coverage reports with ReportGenerator, CRAP (Change Risk Anti-Patterns) score analysis to identify undertested complex code, mutation testing with Stryker.NET to evaluate test suite effectiveness, and strategies for detecting and managing flaky tests.
Version assumptions: Coverlet 6.x+, ReportGenerator 5.x+, Stryker.NET 4.x+ (.NET 8.0+ baseline). Coverlet supports both the MSBuild integration (coverlet.msbuild) and the coverlet.collector data collector; examples use coverlet.collector as the recommended approach.
Out of scope: Test project scaffolding (creating projects, package references, coverlet setup) is owned by [skill:dotnet-add-testing]. Testing strategy and test type decisions are covered by [skill:dotnet-testing-strategy]. CI test reporting and pipeline integration -- see [skill:dotnet-gha-build-test] and [skill:dotnet-ado-build-test].
Prerequisites: Test project already scaffolded via [skill:dotnet-add-testing] with coverlet packages referenced. .NET 8.0+ baseline required.
Cross-references: [skill:dotnet-testing-strategy] for deciding what to test and coverage target guidance, [skill:dotnet-xunit] for xUnit test framework features and configuration.
Code Coverage with Coverlet
Coverlet is the standard open-source code coverage library for .NET. It instruments assemblies at build time or via a data collector and produces coverage reports in multiple formats.
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