Labcoat 1.2.2

Labcoat

A web UI for Microsoft.Testing.Platform. Labcoat builds your Microsoft.Testing.Platform test projects and shows their tests in your browser: a live test tree, failures with the failing line in its source and an expected/actual diff, code coverage per file and per test, watch mode that reruns only the affected tests, and run history with flaky-test detection.

Install and run

Labcoat is a .NET tool and needs the .NET 10 SDK.

# no install: download and run (.NET 10 SDK)
dnx Labcoat

# global tool
dotnet tool install -g Labcoat
labcoat

# local tool, pinned per repository
dotnet new tool-manifest     # once per repository
dotnet tool install Labcoat
dotnet labcoat

Run it in your repository: it finds the test projects (the test project in the current directory, else the nearest .slnx/.sln walking up), builds them and opens the UI in your browser (http://localhost:4300, or the next free port).

labcoat                                   # tests of the current project / solution
labcoat tests/MyApp.Tests --watch         # one project, watch mode
labcoat MyApp.slnx --coverage --no-open   # a solution, coverage on, don't open a browser
labcoat --help                            # all options and environment variables

Requirements

Your test projects must run on Microsoft.Testing.Platform. For MSTest:

<PropertyGroup>
  <OutputType>Exe</OutputType>
  <EnableMSTestRunner>true</EnableMSTestRunner>
</PropertyGroup>

MSTest 4, NUnit (EnableNUnitRunner), xUnit v3 (xunit.v3.mtp-v2) and TUnit are covered by the samples in the repository. Code coverage uses Microsoft.Testing.Extensions.CodeCoverage (included in the MSTest and TUnit packages), with the test project's own coverage.settings.xml / CodeCoverage.xml / *.runsettings when it has one; otherwise Labcoat counts the projects the tests reference and leaves out Labcoat's assemblies, test frameworks and generated code.

Vitest projects run too, with the Labcoat.Vitest runner package: labcoat --runners dotnet,vitest fetches it on the first start (Node.js 20+ and the project's dependencies installed). See docs/runners.md.

Aspire

Using Aspire? Add Labcoat.Aspire.Hosting to your AppHost instead: Labcoat then runs as a resource in the dashboard, with run/watch/coverage commands and optional per-test links to traces and structured logs.

builder.AddLabcoat("tests");

More

• Documentation, screenshots and samples: https://github.com/eriklieben/labcoat
• Running without Aspire, dnx details and the dotnet run -- --labcoat preview: docs/standalone.md
• Changelog: CHANGELOG.md

Labcoat listens on localhost only by default; see SECURITY.md before exposing it on a network.

License

MIT. Labcoat is a community project and is not affiliated with or endorsed by Microsoft or the .NET Foundation.