chore: add code coverage (#518)

* chore: add code coverage

* pr-fix: only test net6.0

* pr-fix: add coverlet packages

* pr-fix: add status badge

.github/workflows/code-coverage.yml

@@ -0,0 +1,38 @@
+name: "Code Coverage"
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ main ]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'csharp' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Coverlet coverage test
+      uses: b3b00/coverlet-action@1.2.4
+      with:
+        testProject: 'src/Arcus.Observability.Tests.Unit/Arcus.Observability.Tests.Unit.csproj'
+        excludes: '[Arcus.Observability.Tests.*]**'
+        threshold: 80
+        output: 'coverage.xml'
+        outputFormat: 'opencover'
+
+    - name: Codecov
+      uses: codecov/codecov-action@v3.1.1
+      if: always()

README.md

@@ -1,6 +1,7 @@
 # Arcus - Observability
 [![Build Status](https://dev.azure.com/codit/Arcus/_apis/build/status/Commit%20builds/CI%20-%20Arcus.Observability?branchName=main)](https://dev.azure.com/codit/Arcus/_build/latest?definitionId=733&branchName=main)
 [![NuGet Badge](https://buildstats.info/nuget/Arcus.Observability.Correlation?includePreReleases=true)](https://www.nuget.org/packages/Arcus.Observability.Correlation/)
+[![codecov](https://codecov.io/gh/arcus-azure/arcus.observability/branch/main/graph/badge.svg?token=59ITMASWGX)](https://codecov.io/gh/arcus-azure/arcus.observability)
 
 Observability with Microsoft Azure in a breeze.
 

src/Arcus.Observability.Tests.Unit/Arcus.Observability.Tests.Unit.csproj

@@ -1,14 +1,22 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFramework>net6.0</TargetFramework>
     <IsPackable>false</IsPackable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <NoWarn>CS0618</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Bogus" Version="34.0.1" />
+    <PackageReference Include="coverlet.collector" Version="3.2.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.msbuild" Version="3.2.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.Data.SqlClient" Version="5.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
     <PackageReference Include="Moq" Version="4.16.1" />