Project/ModulTest/UnitTest.cs

using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using project;

namespace ModulTest
{
    [TestClass]
    public class UnitTest
    {
        [TestMethod]
        public void autorization_valid()
        {
            Testovik obj = new Testovik();
            string login = "123";
            string password = "123";
            string res = "Вы успешно вошли";
            string result = obj.autoRization(login, password);
            Assert.AreEqual(res, result);
        }
        [TestMethod]
        public void autorization_not_login()
        {
            Testovik obj = new Testovik();
            string login = null;
            string password = "123";
            string res = "Введите логин";
            string result = obj.autoRization(login, password);
            Assert.AreEqual(res, result);
        }

        [TestMethod]
        public void autorization_not_password()
        {
            Testovik obj = new Testovik();
            string login = "123";
            string password = null;
            string res = "Введите пароль";
            string result = obj.autoRization(login, password);
            Assert.AreEqual(res, result);
        }

        [TestMethod]
        public void autorization_no_valid()
        {
            Testovik obj = new Testovik();
            string login = "1234234123123";
            string password = "5673342134";
            string res = "Неверный логин и/или пароль";
            string result = obj.autoRization(login, password);
            Assert.AreEqual(res, result);
        }
    }
}