exyi/minicover

Minimalist Code Coverage Tool for .NET Core

MiniCover

Minimalist Code Coverage Tool for .NET Core

Heavily based on: https://github.com/gaillard/SharpCover

THIS PROJECT IS WIP, THERE ARE ONLY PRE-RELEASE NUGET PACKAGES

Introduction

Currently no Code Coverage Tool supports .NET Core on Linux.

MiniCover is here to fill that gap. It is focused on simple code base, usage and installation.

Installation

MiniCover was created to be installed as a .NET Cli Tool. You can do that by adding this to a csproj file:

  <ItemGroup>
    <DotNetCliToolReference Include="MiniCover" Version="2.0.0-ci-*" />
  </ItemGroup>

While .NET Core SDK doesn't support CLI Tools at solution level, I recommend the following approach:

Create an empty .NET Core project called tools on your solution. If you follow the .NET community convention, you should have a folder structure similar to:

MyRepository
  src
    ...
  test
    ...
  tools
     tools.csproj
  MySolution.sln

The tools.csproj will be similar to:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <DotNetCliToolReference Include="MiniCover" Version="2.0.0-ci-*" />
  </ItemGroup>
</Project>

Inside the tools folder, execute:

dotnet restore
dotnet minicover --help

After the last command you should see minicover help instructions on your console.

Build script example with MiniCover

dotnet restore
dotnet build

cd tools

# Instrument assemblies inside 'test' folder to detect hits for source files inside 'src' folder
dotnet minicover instrument --workdir ../ --assemblies test/**/bin/**/*.dll --sources src/**/*.cs 

# Reset hits count in case minicover was run for this project
dotnet minicover reset

cd ..

for project in test/**/*.csproj; do dotnet test --no-build $project; done

cd tools

# Uninstrument assemblies, it's important if you're going to publish or deploy build outputs
dotnet minicover uninstrument --workdir ../

# Create html reports inside folder coverage-html
dotnet minicover htmlreport --workdir ../ --threshold 90

# Print console report
# This command returns failure if the coverage is lower than the threshold
dotnet minicover report --workdir ../ --threshold 90

cd ..

Ignore Coverage Files

Add the following to your .gitignore file to ignore code coverage results:

coverage-html
coverage.json
coverage-hits.txt