protected override void ConfigureWebHost(IWebHostBuilder builder)
        {
            builder.ConfigureServices(services =>
            {
                UserOperations = new UserOperationsSimulator();

                services.AddScoped <IPerformUserOperations>(provider => UserOperations);
            });

            base.ConfigureWebHost(builder);
        }
 public UsersControllerTests(WebApiTestsFixture fixture)
 {
     httpClient     = fixture.HttpClient;
     userOperations = fixture.UserOperations;
 }