Fix non-Windows CI test step for multiple *.Test.csproj matches

dotnet test's underlying MSBuild VSTest target only accepts a single
project (MSB1008: Only one project can be specified), unlike dotnet
build. The non-Windows test step passed the *.Test.csproj glob
straight to dotnet test, which happened to work when only one project
matched it, but now that HtmlRenderer.Test.csproj also matches, dotnet
expands the glob to two paths and the step fails outright. Iterate and
test each matching project individually instead.

Author: jhaygood86

.github/workflows/build.yml

@@ -60,7 +60,13 @@ jobs:
 
     - name: Run Tests
       if: runner.os != 'Windows'
-      run: dotnet test Source/Test/**/*.Test.csproj --configuration Release --no-build --logger trx --results-directory ${{ github.workspace }}/TestResults
+      run: |
+        $failed = $false
+        Get-ChildItem -Path Source/Test -Recurse -Filter *.Test.csproj | ForEach-Object {
+          dotnet test $_.FullName --configuration Release --no-build --logger trx --results-directory ${{ github.workspace }}/TestResults
+          if ($LASTEXITCODE -ne 0) { $failed = $true }
+        }
+        if ($failed) { exit 1 }
       env:
         PDF_OUTPUT_DIRECTORY: ${{ github.workspace }}/pdf-artifacts/${{ matrix.platform.name }}-${{ matrix.dotnet.name }}