AVRO-3415: Add code coverage report support for csharp

lang/csharp/.gitignore

@@ -52,5 +52,7 @@ obj/
 
 #Test results
 TestResult.xml
+Coverage
+TestResults
 
 .vs/

lang/csharp/CODECOVERAGE.md

@@ -0,0 +1,31 @@
+<!--
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ -->
+# C# Avro Code Coverage
+
+The following instructions should be followed in order to create a code coverage report locally. 
+
+1. Open a command prompt
+2. Install ReportGenerator globally\
+	a. Run the following command line: `dotnet tool install --global dotnet-reportgenerator-globaltool --version 5.1.4 --add-source https://www.nuget.org/packages/`\
+	b. The latest version can be found at [Nuget ReportGenerator](https://www.nuget.org/packages/dotnet-reportgenerator-globaltool/)
+3. Navigate to the test project `avro\lang\csharp\src\apache\test`
+4. Run the following test command `dotnet test --results-directory ./TestResults --collect:"XPlat Code Coverage"`
+5. Generate the report with the following command `ReportGenerator "-reports:./TestResults/*/coverage.cobertura.xml" "-targetdir:./Coverage/" -reporttypes:HTML`
+6. Open Report under `avro\lang\csharp\src\apache\test\Coverage\index.html`

lang/csharp/src/apache/test/Avro.test.csproj

@@ -32,6 +32,14 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="$(CoverletCollectorVersion)">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.msbuild" Version="$(CoverletMSBuildVersion)">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.CodeAnalysis" Version="$(MicrosoftCodeAnalysisVersion)" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(MicrosoftCodeAnalysisCSharpVersion)" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(MicrosoftNETTestSdkVersion)" />

lang/csharp/versions.props

@@ -52,9 +52,12 @@
 
   <!--
     These packages are used for building, testing and code analysis. Most likely they are safe to upgrade
+	Please sort the packages alphabetically
   -->
   <PropertyGroup Label="Build, Test, Code Analysis, Benchmark Package Versions">
     <BenchmarkDotNetVersion>0.13.1</BenchmarkDotNetVersion>
+    <CoverletCollectorVersion>3.1.2</CoverletCollectorVersion>
+    <CoverletMSBuildVersion>3.1.2</CoverletMSBuildVersion>
     <MicrosoftBuildFrameworkVersion>17.1.0</MicrosoftBuildFrameworkVersion>
     <MicrosoftBuildUtilitiesCoreVersion>17.1.0</MicrosoftBuildUtilitiesCoreVersion>
     <MicrosoftCodeAnalysisVersion>4.1.0</MicrosoftCodeAnalysisVersion>