Tests for Web Api 2 responses, Web Api 2 routes & Entity-Framework

Trifecta

namespace BackendTests
{
    [TestClass]
    public class UserControllerTests
    {
        private DatabaseContext _context;

        [TestInitialize]
        public void Initialize()
        {
            var connection = Effort.DbConnectionFactory.CreateTransient();
            _context = new DatabaseContext(connection);
        }

        [TestMethod]
        public void Register_WithNewUserInformation_InsertsUser()
        {
            var userController = new UserController(new UserRepository(_context));

            const string email = "test@test.com";
            var newUserInfo = new UserRegisterModel
            {
                Email = email,
                Password = "test",
                FirstName = "Abdul",
                LastName = "Smith"
            };

            userController.Register(newUserInfo);

            Assert.IsNotNull(_context.Users.FirstOrDefault(x => x.Information.Email == email));
        }


        [TestMethod]
        public void Register_WithNewUserInformation_ReturnsHttpCode200()
        {
            var userController = new UserController(new UserRepository(_context));

            const string email = "test@test.com";
            var newUserInfo = new UserRegisterModel
            {
                Email = email,
                Password = "test",
                FirstName = "Abdul",
                LastName = "Smith"
            };

            var response = userController.Register(newUserInfo) as OkNegotiatedContentResult<UserViewModel>;

            Assert.IsNotNull(response);
            Assert.AreEqual(email, response.Content.Information.Email);
        }

        [TestMethod]
        public void Register_WithExistingUserInformation_DoesNotAlterExistingUser()
        {
            var userController = new UserController(new UserRepository(_context));

            const string email = "test@test.com";
            const string originalFirstname = "Abdul";
            const string newFirstName = "John";
            var existingUserInfo = new UserRegisterModel
            {
                Email = email,
                Password = "test",
                FirstName = originalFirstname,
                LastName = "Smith"
            };
            userController.Register(existingUserInfo);

            var newUserInfo = new UserRegisterModel
            {
                Email = email,
                Password = "test",
                FirstName = newFirstName,
                LastName = "Smith"
            };
            userController.Register(newUserInfo);

            Assert.AreEqual(originalFirstname, _context.Users.FirstOrDefault(x => x.Information.Email == email).Information.FirstName);
        }

        [TestMethod]
        public void Register_WithExistingUserInformation_ReturnsHttpCode409()
        {
            var userController = new UserController(new UserRepository(_context));

            const string email = "test@test.com";
            var existingUserInfo = new UserRegisterModel
            {
                Email = email,
                Password = "test",
                FirstName = "Abdul",
                LastName = "Smith"
            };
            userController.Register(existingUserInfo);

            var newUserInfo = new UserRegisterModel
            {
                Email = email,
                Password = "test",
                FirstName = "Abdul",
                LastName = "Smith"
            };

            var response = userController.Register(newUserInfo) as ConflictResult;

            Assert.IsNotNull(response);
        }

        [TestMethod]
        public void Register_WithCorrectRoute_CallsAppropriateMethod()
        {
            var config = new HttpConfiguration();
            WebApiConfig.Register(config);
            config.EnsureInitialized();

            const string route = "/api/users/register";
            RouteAssert.HasApiRoute(config, route, HttpMethod.Post);
            config.ShouldMap(route).To<UserController>(HttpMethod.Post, x => x.Register(null));
        }
    }
}