namespace MyNamespace
{
    [SetUpFixture]
    public class MySetUpClass
    {
        [SetUp]
        public void GlobalInit()
        {
            //Code placed here is going to be executed once per group of fixtures (group of fixtures = fixtures in the same namespace).
        }

        [TearDown]
        public void GlobalDispose()
        {
            //Code placed here is going to be executed once per group of fixtures (group of fixtures = fixtures in the same namespace).
        }
    }

    [TestFixture]
    public class UserTests
    {
        [TestFixtureSetUp]
        public void GeneralInit()
        {
            //Code placed here is going to be executed once per fixture.
        }

        [TestFixtureTearDown]
        public void GeneralDispose()
        {
            //Code placed here is going to be executed once per fixture.
        }

        [SetUp]
        public void Init()
        {
            //Code placed here going to be executed once per test.
        }

        [TearDown]
        public void Dispose()
        {
            //Code placed here going to be executed once per test.
        }

        [Test]
        public void Authenticate_WithoutPassword_ReturnsFailedState()
        {
            //Arrange
            var queryableExpectedResult = Enumerable.Empty<UserDTO>().AsQueryable();
            var userRepositoryStub = new Mock<IUserRepository>();
            userRepositoryStub.Setup(x => x.GetUsersByUsernameAndPassword(It.IsAny<string>(), It.IsAny<string>()))
                .Returns(queryableExpectedResult);

            var userService = new UserService(userRepositoryStub.Object) { Username = "admin2", Password = "" };
            //Act, Assert
            Assert.IsFalse(userService.Authenticate());
        }
    }
}