Head in the Cloud

Most of the time, your solution will have more than one project and a test unit project for each of those. Azure DevOps only, as of this writing, only allows you to update a single code coverage summary. If you upload more than one, each overwrites the next and only the last one remains. To accomplish this, we can use the merge functionality in Coverlet . I use the MSBuild extension, because it is better suited for CI pipelines. In your test project XML, add the package... <PackageReference Include="coverlet.msbuild" Version="2.7.0">     <PrivateAssets>all</PrivateAssets>     <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets> </PackageReference> Then, in your dotnet test command or msbuild command, tell it to use Coverlet and to merge results. If you're using Azure DevOps, your test task looks this... (line wrapped for read ability in the article) - task: DotNetCoreCLI@2 displayName: Test i

I ran into a scenario where my solution had libraries targeting netStandard2.0 and/or net461. For the libraries targeting just net461, I created a “MSTest Unit Test Project (.Net Framework)” project–the “old” project system. The tests ran fine in Visual Studio, but in my CI build, I wanted to keep it simple and run all the tests with dotnet test. However, this tooling cannot see/run the old test project. So, as an experiment, I tried creating a test project in the new project system, and changing the target moniker from NetCoreApp to net461.  It worked! both dotnet test and Visual Studio can run the tests. It’s worth noting that the library is also the new project system. I haven’t tested if that matters. Test Project XML <Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <TargetFramework>net461</TargetFramework> <IsPackable>false</IsPackable> </PropertyGroup> <ItemGroup> <PackageReference Include="Mic