How do you filter xunit tests by trait with "dotnet test"?

I found the answer (only tests attributed [Trait("TraitName", "TraitValue")] are executed):

dotnet test --filter TraitName=TraitValue

Alternatively, you can filter by not having a trait value (tests attributed [Trait("TraitName", "TraitValue")] are execluded from run)

dotnet test --filter TraitName!=TraitValue

In my example above, this means I can run:

dotnet test --filter Color=Blue

More docs here: https://github.com/Microsoft/vstest-docs/blob/master/docs/filter.md

In the csproj

<PropertyGroup>
  <TargetFramework>netcoreapp2.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
  <PackageReference Include="xunit" Version="2.3.0" />
  <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.0" />
</ItemGroup>

command line

dotnet xunit -trait "Color=Blue"