public void WhenAutoExists_UpdateAuto_ItShouldUpdateSuccessfully()
{
Entities applicationContext = CreateTestEntities();
AutoRepository testAutoRepository = new AutoRepository(applicationContext);
int testAutoId = 2;
Automobil testAuto = applicationContext.Automobils.FirstOrDefault(a => a.AutoId == testAutoId);
testAuto.NumarAuto = "Upd";
testAutoRepository.UpdateAuto(testAuto);
applicationContext.Automobils.FirstOrDefault(a => a.AutoId == testAutoId)?.NumarAuto.Should().Be("Upd");
}