public void DeleteItemTest()
{
var repo = new TeachersRepository(_context);
var item = new Teacher
{
FirstName = "Kate",
MiddleName = "Mary",
LastName = "March",
Department = _context.Departments.FirstOrDefault()
};
repo.AddItem(item);
int Id = _context.Teachers.FirstOrDefault(x => x.FirstName == item.FirstName &&
x.MiddleName == item.MiddleName &&
x.LastName == item.LastName).Id;
Assert.AreEqual(item.FirstName, repo.GetItem(Id).FirstName);
Assert.AreEqual(item.MiddleName, repo.GetItem(Id).MiddleName);
Assert.AreEqual(item.LastName, repo.GetItem(Id).LastName);
repo.DeleteItem(Id);
Assert.AreEqual(item.LastName, repo.GetItem(Id).LastName);
}