.net core using UserSecrets in tests

gistfile1.txt

It took me too much time to get it working, so I'll describe steps of how to use UserSecrets in testing.

1. Create Unit test project for .net core
2. reference Microsoft.AspNetCore.Mvc.Testing , Microsoft.Extensions.Configuration and Microsoft.Extensions.Configuration.UserSecrets

3. Add a user secret tag to your assembly:
[assembly: UserSecretsId("your_user_secret_id")]
namespace XUnitTestProject1
{
...
}
alternatively you can copy it from .net core app project file
 <PropertyGroup> 
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
    <UserSecretsId>("your_user_secret_id")</UserSecretsId>
  </PropertyGroup>
  
and paste to unit test project file

4. Init configuration as

  public class UnitTest1
    {
        public static IConfiguration Configuration { get; set; }

        public UnitTest1()
        {
            var builder = new ConfigurationBuilder().AddUserSecrets<UnitTest1>();  
            Configuration = builder.Build();
        }

        [Fact]
        public void Test1()
        {
            var _connectionStringFromUserSecrets =
                   Configuration["DataBase:ConnectionString"];
            Assert.True(_connectionStringFromUserSecrets.Length>0);
        }
    }
    
5. Now you can use your UserSecrets as in .net core app.