Track code coverage (loic-sharma#452)

* Add coverlet.collector to test projects
* Add steps to ci-official.yml to publish results

Addresses loic-sharma#397

.azure/pipelines/ci-official.yml

@@ -65,7 +65,23 @@ jobs:
       inputs:
           command: test
           projects: '**/*Tests/*.csproj'
-          arguments: '--configuration $(BuildConfiguration)'
+          arguments: '--configuration $(BuildConfiguration) --settings $(System.DefaultWorkingDirectory)/CodeCoverage.runsettings --collect:"XPlat Code Coverage" -- RunConfiguration.DisableAppDomain=true'
+
+    - task: DotNetCoreCLI@2
+      inputs:
+          command: custom
+          custom: tool
+          arguments: install --tool-path . dotnet-reportgenerator-globaltool
+      displayName: Install ReportGenerator tool
+
+    - script: reportgenerator -reports:$(Agent.TempDirectory)/**/coverage.cobertura.xml -targetdir:$(Build.SourcesDirectory)/coverlet/reports -reporttypes:"HtmlInline_AzurePipelines_Dark;Cobertura;Badges"
+      displayName: Create reports
+
+    - task: PublishCodeCoverageResults@1
+      displayName: 'Publish code coverage'
+      inputs:
+        codeCoverageTool: Cobertura
+        summaryFileLocation: $(Build.SourcesDirectory)/coverlet/reports/Cobertura.xml  
 
     - script: dotnet pack --configuration $(BuildConfiguration) --output $(Build.ArtifactStagingDirectory)
       displayName: Pack

CodeCoverage.runsettings

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<RunSettings>
+  <DataCollectionRunSettings>
+    <DataCollectors>
+      <DataCollector friendlyName="XPlat code coverage">
+        <Configuration>
+          <Format>json,cobertura</Format>          
+          <ExcludeByAttribute>Obsolete,GeneratedCodeAttribute,CompilerGeneratedAttribute</ExcludeByAttribute>
+          <SingleHit>false</SingleHit>
+          <UseSourceLink>true</UseSourceLink>
+          <IncludeTestAssembly>true</IncludeTestAssembly>
+        </Configuration>
+      </DataCollector>
+    </DataCollectors>
+  </DataCollectionRunSettings>
+</RunSettings>

tests/BaGet.Core.Tests/BaGet.Core.Tests.csproj

@@ -12,6 +12,10 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="1.2.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
   <ItemGroup>

tests/BaGet.Protocol.Tests/BaGet.Protocol.Tests.csproj

@@ -12,6 +12,10 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="1.2.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
   <ItemGroup>

tests/BaGet.Tests/BaGet.Tests.csproj

@@ -18,6 +18,10 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="1.2.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
   <ItemGroup>