.NET Core–Unit Tests Configuration

Inside my (.NET Core) unit tests I wanted to load my configuration. I created a small helper method that loads my configuration from a json file:

	public IConfigurationRoot BuildConfiguration(string testDirectory)
	{
	return new ConfigurationBuilder()
	.SetBasePath(testDirectory)
	.AddJsonFile("appsettings.json", optional: true)
	.Build();
	}

view raw BuildConfig.cs hosted with ❤ by GitHub

To make this code compile, you have to add 2 NuGet packages to your test project:

• To enable the SetBasePath method: https://www.nuget.org/packages/Microsoft.Extensions.Configuration.FileExtensions/
• To enable the AddJsonFile method: https://www.nuget.org/packages/Microsoft.Extensions.Configuration.Json/

Now you can invoke this method inside your test setup (I’m using NUnit so I use the OneTimeSetUp method) and pass on the TestDirectory (which is through TestContext.CurrentContext.TestDirectory for NUnit):

	[TestFixture]
	public class Tests
	{
	private IConfiguration _configuration;
	[OneTimeSetUp]
	public void Init()
	{
	_configuration=BuildConfiguration(TestContext.CurrentContext.TestDirectory);
	}
	}

view raw TestConfigSetup.cs hosted with ❤ by GitHub

Remark: Don’t forget to set the appsettings.json file properties to ‘Copy Always’