public async Task TestUpdateCustomer()
{
using var context = new CustomersDbContext(dbContextOptions);
var customerDTO = new CustomerInput {
Name = "Petya", Surname = "Ivanov", Email = "*****@*****.**"
};
var customer = new Customer(customerDTO)
{
Id = 2
};
var result = await customersController.UpdateCustomerAsync(2, customerDTO);
Assert.That(result, Is.InstanceOf <OkResult>());
Assert.That(context.Find <Customer>((long)2), Is.EqualTo(customer));
}