TisNET5/UnitTestProject1/UnitTest1.cs

using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using NET;
using System.Linq;

namespace UnitTestProject1
{
    [TestClass]
    public class InsertTest
    {
        BookStoreContext _context = new BookStoreContext();
        MainWindow page = new MainWindow();

        [TestMethod]
        public void Insert()
        {
            string name, price, author, category;

            name = "Токийские легенды";
            price = "566";
            author = "Харуки Мураками";
            category = "Сборник рассказов";

            Assert.IsTrue(page.Insert(name, price, author, category));

            Books book = _context.Books.Where(x => x.Name == name).FirstOrDefault();
            _context.Books.Remove(book);
            _context.SaveChanges();

            name = "Токийские легенды";
            price = "mems";
            author = "Харуки Мураками";
            category = "Сборник рассказов";

            Assert.IsFalse(page.Insert(name, price, author, category));
        }
    }
}