This provides a concrete example using the references that Dale C provided to this question earlier.
It has been tested with .NET6. The example will load configuration from
- appsettings.json
- secrets.json
- Environment variables
Create a test project
In your test project
- Add nuget package Microsoft.Extensions.Configuration.UserSecrets
- In the
.csproj file of our test project, add the guid of the user secret we want to access.
<PropertyGroup>
<UserSecretsId>0e8ea027-2feb-4098-ba69-4a6711e8eee2</UserSecretsId>
</PropertyGroup>
- Create a test class
using NUnit.Framework;
using MediatR;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace Example
{
public class ConfigurationExampleTest
{
public IMediator? _mediator { get; set; }
public IConfiguration config { get; set; }
[SetUp]
public void Setup()
{
// The startupPath is simply one way of getting the path to
// appettings.json. We could hard code tha path if necessary
// or use any other method to obtain the path to appsettings.json
var filepath = typeof(WebApp.Startup)
.Assembly.Location;
var StartupPath = Path.GetDirectoryName(filepath);
config = new ConfigurationBuilder()
.SetBasePath(StartupPath)
.AddJsonFile("appsettings.json", optional: true)
.AddUserSecrets<ConfigurationExampleTest>()
.AddEnvironmentVariables()
.Build();
var host = Host.CreateDefaultBuilder()
.ConfigureWebHostDefaults(builder =>
{
builder.UseStartup<WebApp.Startup>();
})
.ConfigureServices(services =>
{
// Adds the config to the dependency injection
// This makes the config object accessible in
// your WebApp/project-under-test
services.AddSingleton(config);
})
.Build();
// This will get any service we added to the dependency injection
// in WebApp.Startup
_mediator = host.Services.GetService<IMediator>();
}
[TearDown]
public void Teardown()
{ }
[Test]
public void ExampleTest()
{
// The configuration object will now be available
// vai dependency ibjection
// We can use the_mediator instance we got from the
// dependency injection here
// _mediator.Send(<your request>);
}
}
}
References:
