public async void GetDogsittersAsyncShouldReturnAllDogsitters() { var options = new DbContextOptionsBuilder <ApplicationDbContext>() .UseInMemoryDatabase(Guid.NewGuid().ToString()); var userRepository = new EfDeletableEntityRepository <ApplicationUser>(new ApplicationDbContext(options.Options)); var dogsitterRepository = new EfDeletableEntityRepository <Dogsitter>(new ApplicationDbContext(options.Options)); var ownerRepository = new EfDeletableEntityRepository <Owner>(new ApplicationDbContext(options.Options)); var ownersService = new OwnersService(userRepository, ownerRepository, dogsitterRepository); var user = new ApplicationUser(); var user2 = new ApplicationUser(); var role = new ApplicationRole { Name = "Dogsitter", NormalizedName = "DOGSITTER", }; user.Roles.Add(new IdentityUserRole <string> { UserId = user.Id, RoleId = role.Id }); user2.Roles.Add(new IdentityUserRole <string> { UserId = user.Id, RoleId = role.Id }); var dogsitters = ownersService.GetDogsittersAsync(new List <ApplicationUser> { user, user2 }); Assert.Equal(2, dogsitters.Count); }