public void RemoveFromFront()
{
_customerLine.Dequeue();
if (_customerLine.Count == 0)
{
_lastCustomer = null;
}
}
public void RegisterShouldNotHaveCustomersWhenSufficientTimeHasPassedToProcessItem()
{
Register register = new Register(1);
Customer customer = new Customer(new ShorterLineStrategy(), Customer.TypeAPriorityLevel, 1, 1);
register.AddCustomerToLine(customer);
Assert.IsTrue(register.HasCustomers);
register.ProcessOneMinute();
Assert.IsFalse(register.HasCustomers);
}
public void SecondRegisterShouldBeBetterWhenItsLastCustomerHasFewerItems()
{
Customer customerWithOneItem = new Customer(null, Customer.TypeAPriorityLevel, 1, 1);
Customer customerWithTwoItems = new Customer(null, Customer.TypeAPriorityLevel, 1, 2);
_register1.AddCustomerToLine(customerWithTwoItems);
_register2.AddCustomerToLine(customerWithOneItem);
Assert.AreEqual(_register2, _strategy.GetBetterRegister(_register1, _register2));
}
public void LastRegisterShouldUseBeginnerTimeToProcessItemWhenThereIsOnlyOneRegister()
{
IList<Register> registers = _factory.GetRegisters(1);
Customer customer = new Customer(null, Customer.TypeAPriorityLevel, 1, 1);
Register beginnerRegister = registers[0];
beginnerRegister.AddCustomerToLine(customer);
Assert.IsTrue(beginnerRegister.HasCustomers);
beginnerRegister.ProcessOneMinute();
Assert.IsTrue(beginnerRegister.HasCustomers);
beginnerRegister.ProcessOneMinute();
Assert.IsFalse(beginnerRegister.HasCustomers);
}
public void LastCustomerInLineShouldReturnTheMostRecentCustomerAdded()
{
Register register = new Register(1);
Customer customer1 = new Customer(new ShorterLineStrategy(), Customer.TypeAPriorityLevel, 1, 1);
Customer customer2 = new Customer(new ShorterLineStrategy(), Customer.TypeAPriorityLevel, 1, 1);
register.AddCustomerToLine(customer1);
Assert.AreEqual(customer1, register.LastCustomerInLine);
register.AddCustomerToLine(customer2);
Assert.AreEqual(customer2, register.LastCustomerInLine);
}
public static int CompareCustomers(Customer customer1, Customer customer2)
{
const int customer1GoesFirst = -1;
const int customer2GoesFirst = 1;
if (customer1.NumberOfItems < customer2.NumberOfItems) return customer1GoesFirst;
if (customer2.NumberOfItems < customer1.NumberOfItems) return customer2GoesFirst;
//lower number priorities are higher priority as in 1=first, 2=second
if (customer1.PriorityLevel < customer2.PriorityLevel) return customer1GoesFirst;
if (customer2.PriorityLevel < customer1.PriorityLevel) return customer2GoesFirst;
return 0;
}
public void PriorityCustomersShouldGoFirstWhenCustomersHaveTheSameNumberOfItems()
{
Customer priorityCustomerWithOneItem = new Customer(null, Customer.TypeAPriorityLevel, 1, 1);
Customer customerWithOneItem = new Customer(null, Customer.TypeBPriorityLevel, 1, 1);
Customer priorityCustomerWithTwoItems = new Customer(null, Customer.TypeAPriorityLevel, 1, 2);
Customer customerWithTwoItems = new Customer(null, Customer.TypeBPriorityLevel, 1, 2);
_customers.Add(customerWithTwoItems);
_customers.Add(customerWithOneItem);
_customers.Add(priorityCustomerWithOneItem);
_customers.Add(priorityCustomerWithTwoItems);
_customers.Sort(CustomerComparer.CompareCustomers);
Assert.AreEqual(_customers[0], priorityCustomerWithOneItem);
Assert.AreEqual(_customers[1], customerWithOneItem);
Assert.AreEqual(_customers[2], priorityCustomerWithTwoItems);
Assert.AreEqual(_customers[3], customerWithTwoItems);
}
public void CustomersWithFewerItemsShouldGoFirst()
{
Customer customerWithOneItem = new Customer(null, Customer.TypeBPriorityLevel, 1, 1);
Customer customerWithTwoItems = new Customer(null, Customer.TypeAPriorityLevel, 1, 2);
Customer customerWithThreeItems = new Customer(null, Customer.TypeBPriorityLevel, 1, 3);
Customer customerWithFourItems = new Customer(null, Customer.TypeAPriorityLevel, 1, 4);
_customers.Add(customerWithTwoItems);
_customers.Add(customerWithOneItem);
_customers.Add(customerWithFourItems);
_customers.Add(customerWithThreeItems);
_customers.Sort(CustomerComparer.CompareCustomers);
Assert.AreEqual(_customers[0], customerWithOneItem);
Assert.AreEqual(_customers[1], customerWithTwoItems);
Assert.AreEqual(_customers[2], customerWithThreeItems);
Assert.AreEqual(_customers[3], customerWithFourItems);
}
public void RegistersThatAreNotLastShouldUseStandardItemProcessingTime()
{
IList<Register> registers = _factory.GetRegisters(3);
Customer customer1 = new Customer(null, Customer.TypeAPriorityLevel, 1, 1);
Customer customer2 = new Customer(null, Customer.TypeAPriorityLevel, 1, 1);
Register standardRegister1 = registers[0];
Register standardRegister2 = registers[1];
standardRegister1.AddCustomerToLine(customer1);
Assert.IsTrue(standardRegister1.HasCustomers);
standardRegister1.ProcessOneMinute();
Assert.IsFalse(standardRegister1.HasCustomers);
standardRegister2.AddCustomerToLine(customer2);
Assert.IsTrue(standardRegister2.HasCustomers);
standardRegister2.ProcessOneMinute();
Assert.IsFalse(standardRegister2.HasCustomers);
}
public void ShouldThrowExceptionWhenDecrementIsCalledAndThereAreNoItems()
{
_customer = _testHelper.GetDefaultCustomer(0);
Assert.Throws(typeof(ApplicationException), () => _customer.DecrementItems());
}
public void NumberShouldDecreaseByOneWhenDecrementIsCalled()
{
_customer = _testHelper.GetDefaultCustomer(5);
_customer.DecrementItems();
Assert.AreEqual(4, _customer.NumberOfItems);
}
public void HasItemsShouldBeTrueWhenNumberOfItemsIsGreaterThanZero()
{
_customer = _testHelper.GetDefaultCustomer(1);
Assert.IsTrue(_customer.HasItems);
}
public void HasItemsShouldBeFalseWhenNumberOfItemsIsZero()
{
_customer = _testHelper.GetDefaultCustomer(0);
Assert.IsFalse(_customer.HasItems);
}
public void AddToEnd(Customer customer)
{
_lastCustomer = customer;
_customerLine.Enqueue(customer);
}
public void AddCustomerToLine(Customer customer)
{
_customerLine.AddToEnd(customer);
}