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Merge pull request #3679 from IEvangelist/unit-testing-coverage
Unit testing code coverage
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‎csharp/unit-testing-code-coverage/.gitignore‎

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/TestResults/*
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/Reports/*
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coverage.json

‎csharp/unit-testing-code-coverage/Numbers/Numbers.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>netstandard2.0</TargetFramework>
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</PropertyGroup>
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</Project>

‎csharp/unit-testing-code-coverage/Numbers/PrimeService.cs‎

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namespace System.Numbers
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{
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public class PrimeService
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{
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public bool IsPrime(int candidate)
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{
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if (candidate < 2)
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{
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return false;
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}
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for (int divisor = 2; divisor <= Math.Sqrt(candidate); ++divisor)
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{
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if (candidate % divisor == 0)
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{
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return false;
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}
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}
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return true;
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}
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}
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}

‎csharp/unit-testing-code-coverage/README.md‎

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---
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languages:
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- csharp
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products:
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- dotnet
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- dotnet-core
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page_type: sample
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name: ".NET Core unit testing code coverage"
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urlFragment: "unit-testing-code-coverage-cs"
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description: ".NET Core unit testing code coverage and reporting with coverlet, and ReportGenerator."
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---
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# .NET Core unit testing code coverage
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This sample solution includes a class library that is unit tested by two xUnit test projects. The corresponding article, [use code coverage for unit testing](https://docs.microsoft.com/dotnet/core/testing/unit-testing-code-coverage) details the usage of C#, xUnit, coverlet, and ReportGenerator.
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## Sample prerequisites
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This sample is written in C# and targets .NET Core 3.1. It requires the [.NET Core 3.1 SDK](https://dotnet.microsoft.com/download/dotnet-core/3.1).
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## Building the sample
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The source code includes an MSBuild project file for C# (a *.csproj* file) that targets .NET Core 3.1. After you download the *.zip* file containing the example code, create a directory and select **Download ZIP** to download the sample code files to your computer. To build the example:
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1. Download the *.zip* file containing.
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1. Create the directory to which you want to copy the files.
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1. Copy the files from the *.zip* file to the directory you just created.
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1. If you are using Visual Studio 2019:
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1. In Visual Studio, select **Open a project or solution** (or **File** > **Open** > **Project/Solution** from the Visual Studio menu.
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1. Select **Debug** > **Start Debugging** from the Visual Studio menu to build and launch the application.
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1. If you are working from the command line:
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1. Navigate to the directory that contains the sample.
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1. Type in the command `dotnet run` to build and launch the application.

‎csharp/unit-testing-code-coverage/XUnit.Coverage.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.30204.135
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "XUnit.Coverlet.MSBuild", "XUnit.Coverlet.MSBuild\XUnit.Coverlet.MSBuild.csproj", "{D175215F-6236-4099-AF52-1A590D469C77}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "XUnit.Coverlet.Collector", "XUnit.Coverlet.Collector\XUnit.Coverlet.Collector.csproj", "{2658198A-3AF7-41BC-9A4B-FC527B966ADE}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Numbers", "Numbers\Numbers.csproj", "{EE84B727-F32F-4AC0-AF3E-35ED1C2ABF54}"
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EndProject
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{4B1428C5-6394-41F0-BD14-E5D600734E9D}"
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ProjectSection(SolutionItems) = preProject
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.gitignore = .gitignore
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README.md = README.md
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EndProjectSection
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{D175215F-6236-4099-AF52-1A590D469C77}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{D175215F-6236-4099-AF52-1A590D469C77}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{D175215F-6236-4099-AF52-1A590D469C77}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{D175215F-6236-4099-AF52-1A590D469C77}.Release|Any CPU.Build.0 = Release|Any CPU
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{2658198A-3AF7-41BC-9A4B-FC527B966ADE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{2658198A-3AF7-41BC-9A4B-FC527B966ADE}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{2658198A-3AF7-41BC-9A4B-FC527B966ADE}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{2658198A-3AF7-41BC-9A4B-FC527B966ADE}.Release|Any CPU.Build.0 = Release|Any CPU
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{EE84B727-F32F-4AC0-AF3E-35ED1C2ABF54}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{EE84B727-F32F-4AC0-AF3E-35ED1C2ABF54}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{EE84B727-F32F-4AC0-AF3E-35ED1C2ABF54}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{EE84B727-F32F-4AC0-AF3E-35ED1C2ABF54}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {6FC1D618-6596-4B95-AE0F-AE47427A6748}
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EndGlobalSection
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EndGlobal

‎csharp/unit-testing-code-coverage/XUnit.Coverlet.Collector/PrimeServiceTests.cs‎

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using System.Numbers;
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using Xunit;
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namespace XUnit.Coverlet
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{
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public class PrimeServiceTests
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{
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readonly PrimeService _primeService;
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public PrimeServiceTests() => _primeService = new PrimeService();
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[
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Theory,
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InlineData(-1), InlineData(0), InlineData(1)
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]
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public void IsPrime_ValuesLessThan2_ReturnFalse(int value) =>
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Assert.False(_primeService.IsPrime(value), $"{value} should not be prime");
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[
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Theory,
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InlineData(2), InlineData(3), InlineData(5), InlineData(7)
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]
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public void IsPrime_PrimesLessThan10_ReturnTrue(int value) =>
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Assert.True(_primeService.IsPrime(value), $"{value} should be prime");
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[
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Theory,
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InlineData(4), InlineData(6), InlineData(8), InlineData(9)
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]
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public void IsPrime_NonPrimesLessThan10_ReturnFalse(int value) =>
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Assert.False(_primeService.IsPrime(value), $"{value} should not be prime");
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}
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}

‎csharp/unit-testing-code-coverage/XUnit.Coverlet.Collector/XUnit.Coverlet.Collector.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>netcoreapp3.1</TargetFramework>
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<IsPackable>false</IsPackable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.6.1" />
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<PackageReference Include="ReportGenerator" Version="4.6.1" />
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<PackageReference Include="xunit" Version="2.4.1" />
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<PackageReference Include="xunit.runner.visualstudio" Version="2.4.2">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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</PackageReference>
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<PackageReference Include="coverlet.collector" Version="1.3.0">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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</PackageReference>
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\Numbers\Numbers.csproj" />
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</ItemGroup>
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<ItemGroup>
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<Folder Include="TestResults\" />
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</ItemGroup>
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</Project>

‎csharp/unit-testing-code-coverage/XUnit.Coverlet.MSBuild/PrimeServiceTests.cs‎

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using System.Numbers;
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using Xunit;
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namespace XUnit.Coverlet
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{
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public class PrimeServiceTests
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{
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readonly PrimeService _primeService;
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public PrimeServiceTests() => _primeService = new PrimeService();
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[
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Theory,
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InlineData(-1), InlineData(0), InlineData(1)
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]
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public void IsPrime_ValuesLessThan2_ReturnFalse(int value) =>
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Assert.False(_primeService.IsPrime(value), $"{value} should not be prime");
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[
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Theory,
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InlineData(2), InlineData(3), InlineData(5), InlineData(7)
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]
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public void IsPrime_PrimesLessThan10_ReturnTrue(int value) =>
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Assert.True(_primeService.IsPrime(value), $"{value} should be prime");
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[
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Theory,
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InlineData(4), InlineData(6), InlineData(8), InlineData(9)
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]
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public void IsPrime_NonPrimesLessThan10_ReturnFalse(int value) =>
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Assert.False(_primeService.IsPrime(value), $"{value} should not be prime");
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}
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}

‎csharp/unit-testing-code-coverage/XUnit.Coverlet.MSBuild/XUnit.Coverlet.MSBuild.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>netcoreapp3.1</TargetFramework>
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<IsPackable>false</IsPackable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="coverlet.msbuild" Version="2.9.0">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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</PackageReference>
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<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.6.1" />
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<PackageReference Include="xunit" Version="2.4.1" />
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<PackageReference Include="xunit.runner.visualstudio" Version="2.4.2">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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</PackageReference>
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<PackageReference Include="coverlet.collector" Version="1.3.0">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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</PackageReference>
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\Numbers\Numbers.csproj" />
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</ItemGroup>
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</Project>

‎csharp/unit-testing/.gitignore‎

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/TestResults/*
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/Reports/*
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coverage.json

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