How Is Code Coverage Assessed?

There are several ways of collecting code coverage metrics while running .NET tests. One common method is to install the coverlet.collector NuGet package in the test project. This package already comes preinstalled if we use the default xUnit project template.

The following playground demonstrates how the coverlet.collector collects the coverage metrics. The NuGet package reference is on lines 19–22 of the MainApp.Tests.csproj file.