RegAuth/UnitTestProject1/UnitTest1.cs

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

namespace UnitTestProject1
{
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethod1()
        {
            var page = new MainWindow();
            Assert.IsTrue(page.Auth("qwe", "123"));
            Assert.IsFalse(page.Auth("dfgdf", "235423"));
            Assert.IsFalse(page.Auth("mjhhj", "15546"));
        }
    }
}