Pro .NET 2.0 Extreme Programming 2006 phần 8 pps

Listing 15-3.CustomerTests.cs File #region Using directives private string userName; private string userPassword; private string userRole; private string customerID; private string compa

try{OdbcConnection dataConnection = new OdbcConnection();

product = new Product();

Console.WriteLine("Error: " + e.Message);

}

return products;

}}}

You should do the same for the UserData and CategoryData classes in the DataLayer project,

as well as for the CategoryTests, ProductTests, ShoppingCartTests, and UserTests classes in the

TestLayer Then rerun all your unit tests to make sure that you have not introduced any errors

Developing the Display Checkout Confirmation User Story

The following tasks were identified for the Display Checkout Confirmation story during tion planning (see Chapter 14):

itera-• Create Checkout Confirmation page

• Add button to check out the shopping cart contents

• Add button to cancel the checkout

• Display shopping cart contents in Checkout Confirmation page

• Subtotal shopping cart line items and display results

• Add button to process the order request

• Build Customer

• Build Order

• Build Order Detail

Build Customer, Build Order, and Build Order Detail are the only tasks that will have ness and data classes The remaining tasks will be at the web layer We will start out with these

busi-three tasks, and then wrap up with the web layer

As with the tasks in the first iteration, the Build Customer, Build Order, and Build OrderDetail tasks use four layers of your solution: the test layer, data layer, web layer, and business

layer Remember that you are taking a test-driven approach Using that approach, you start

with a basic test, add a data class to support the test, and then add a business class to support

the data class Then, as the test evolves, you iteratively enhance the data and business classes

as needed For brevity, we will show only the completed outcome of these tasks in this chapter

Build Customer Task

The Build Customer task involves building a representation of a customer within your application

A customer is someone who has placed an order Don’t confuse a customer with a user A user is

someone who has access to your website but may not have placed an order Listings 15-3, 15-4,

and 15-5 show the test, data, and business classes for a customer, respectively

Listing 15-3.CustomerTests.cs File

#region Using directives

private string userName;

private string userPassword;

private string userRole;

private string customerID;

private string companyName;

private string address;

private string city;

private string postalCode;

private string country;

private string phoneNumber;

public CustomerTests(){

userName = "bogus user";

userPassword = "bogus";

userRole = "customer";

customerID = "Z1Z1Z";

companyName = "Bogus Company";

address = "1234 Main Street";

Customer foundCustomer = CustomerData.FindCustomerByUserName(userName);

Assert.IsNotNull(foundCustomer, "Found customer object was null, gasp!");AssertiAreEqual(customerID, foundCustomer.CustomerID,

"Customer ID don't match, gasp!");

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the INSERT workedAssert.AreEqual(1, rows, "Unexpected Users row count ");

dataConnection.Close();

}catch(Exception e){

Assert.Fail("Users database error: " + e.Message);

}}

private void RemoveUser(){

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("DELETE FROM Users WHERE UserName = '");commandText.Append(userName);

commandText.Append("'");

dataCommand.CommandText = commandText.ToString();

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the DELETE workedAssert.AreEqual(1, rows"Unexpected Users row count, gasp!");

dataConnection.Close();

}catch(Exception e){

Asser.Fail("Users database error: " + e.Message);

}}

private void CreateCustomer(){

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;

dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("INSERT INTO Customers (");

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the INSERT workedAssert.AreEqual(1, rows, "Unexpected Customers row count, gasp!");

dataConnection.Close();

}catch(Exception e){

Assert.Fail("Customers database error: " + e.Message);

}}

private void RemoveCustomer(){

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("DELETE FROM Customers WHERE CustomerID = '");commandText.Append(customerID);

commandText.Append("'");

dataCommand.CommandText = commandText.ToString();

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the DELETE workedAssert.AreEqual(1, rows, "Unexpected Customers row count, gasp!");

dataConnection.Close();

}catch(Exception e){

Assertion.Assert("Customers database error: " +e.Message, e.Message.Equals(""));

}}}}

Listing 15-4.CustomerData.cs File

#region Using directive

commandText.Append("'");

dataCommand.CommandText = commandText.ToString();

OdbcDataReader dataReader = dataCommand.ExecuteReader();

// Make sure that we found our user

if (dataReader.Read()){

customer = new Customer(dataReader.GetString(0), // CustomerIDdataReader.GetString(1), // UserNamedataReader.GetString(2), // CompanyNamedataReader.GetString(5), // AddressdataReader.GetString(6), // CitydataReader.GetString(8), // PostalCodedataReader.GetString(9), // CountrydataReader.GetString(10) // Phone);

}

}catch(Exception e){

Console.WriteLine("error: " + e.Message);}

return customer;

}}}

Listing 15-5.Customer.cs File

#region Using directives

private string customerID;

private string userName;

private string companyName;

private string address;

private string city;

private string postalCode;

private string country;

private string phoneNumber;

public Customer(){

}

public Customer(string customerID,

string userName,string companyName,string address,string city,string postalCode,string country,string phoneNumber)

{this.customerID = customerID;

}set{this.customerID = value;

}}

public string UserName{

get{return this.userName;

}set{this.userName = value;

}}

public string CompanyName{

get{return this.companyName;

}set{this.companyName = value;

}}

public string Address{

get{return this.address;}

set{this.address = value;}

}

public string City{

get{return this.city;}

set{this.city = value;}

}

public string PostalCode{

get{return this.postalCode;}

set{this.postalCode = value;}

}

public string Country{

get{return this.country;}

set{this.country = value;}

}

public string PhoneNumber{

get{return this.phoneNumber;

}set{this.phoneNumber = value;

}}}}

Build Order Task

Next comes the Build Order task The Order class represents an entire order that is associated

with a customer Listings 15-6, 15-7, and 15-8 show the test, data, and business classes for an

order, respectively

■ Note In the final source code for this iteration,TestInsertOrderis refactored into a CreateOrder

private method and used in the setup method for subsequent use by other Ordertest cases

Listing 15-6.OrderTests.cs File

#region Using directives

private string userName;

private string userPassword;

private string userRole;

private Customer customer;

private string customerID;

private string companyName;

private string address;

private string city;

private string postalCode;

private string country;

private string phoneNumber;

private int orderID;

private DateTime orderDate;

private DateTime shipDate;

public OrderTests(){

userName = "bogus user";

userPassword = "bogus";

userRole = "customer";

customer = null;

customerID = "Z1Z1Z";

companyName = "Bogus Company";

address = "1234 Main Street";

city = "Hometown";

postalCode = "10001";

country = "United States";

phoneNumber = "303-555-1234";

orderDate = new System.DateTime(2999, 1, 1);

shipDate = new System.DateTime(2999, 1, 2);

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the INSERT workedAssert.AreEqual(1, rows, "Unexpected Users row count ");

dataConnection.Close();

}catch(Exception e){

Assert.Fail("Users database error: " + e.Message);

}}

private void RemoveUser(){

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("DELETE FROM Users WHERE UserName = '");commandText.Append(userName);

commandText.Append("'");

dataCommand.CommandText = commandText.ToString();

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the DELETE workedAssert.AreEqual(1, rows, "Unexpected Users row count ");

dataConnection.Close();

}catch(Exception e){

Assert.fail("Users database error: " + e.Message);

}}

private void CreateCustomer(){

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("INSERT INTO Customers (");

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the INSERT workedAssert.AreEqual(1, rows, "Unexpected Customers row count ");

dataConnection.Close();

// Initialize new Customercustomer = new Customer(customerID, userName, companyName,address, city, postalCode, country, phoneNumber);

Assert.IsNotNull(customer, "Newly created customer is null, gasp!");

}catch(Exception e){

Assert.Fail("Customers database error: " + e.Message,);

}}

private void RemoveCustomer(){

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("DELETE FROM Customers WHERE CustomerID = '");commandText.Append(customerID);

commandText.Append("'");

dataCommand.CommandText = commandText.ToString();

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the DELETE workedAssertAreEqual(1, rows, "Unexpected Customers row count, gasp!");

dataConnection.Close();

// Free up our customer objectcustomer = null;

}catch(Exception e){

Assert.Fail("Customers database error: " + e.Message,);

}}

private void RemoveOrder(){

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("DELETE FROM Orders WHERE OrdersID = ");

commandText.Append(orderID);

dataCommand.CommandText = commandText.ToString();

int rows = dataCommand.ExecuteNonQuery();

// Make sure that the DELETE workedAssert.AreEqual(1, rows, "Unexpected Orders row count, gasp!");

dataConnection.Close();

}catch(Exception e){

Assert.Fail("Orders database error: " + e.Message);

}}}}

Listing 15-7.OrderData.cs File

#region Using directives

try{OdbcConnection dataConnection = new OdbcConnection();

dataConnection.ConnectionString = DataUtilities.ConnectionString;dataConnection.Open();

OdbcCommand dataCommand = new OdbcCommand();

dataCommand.Connection = dataConnection;

// Build command stringStringBuilder commandText =new StringBuilder("INSERT INTO Orders (");

int rows = dataCommand.ExecuteNonQuery();

// Get the ID of the order we just inserted// This will be used to remove the order in the test TearDowncommandText =

new StringBuilder("SELECT Max(OrdersID) FROM Orders");

dataCommand.CommandText = commandText.ToString();

OdbcDataReader dataReader = dataCommand.ExecuteReader();

// Make sure that you found the user

if (dataReader.Read()){

orderID = dataReader.GetInt32(0);

}

dataConnection.Close();

}catch(Exception e){

Console.WriteLine("error: " + e.Message);

}return orderID;

}}}

Listing 15-8.Order.cs File

#region Using directives

private int orderID;

private string customerID;

private DateTime orderDate;

private DateTime shipDate;

private string shipName;

private string shipAddress;

private string shipCity;

private string shipPostalCode;

private string shipCountry;

public Order(){

}

public Order(int orderID,string customerID,DateTime orderDate,DateTime shipDate,string shipName,string shipAddress,string shipCity,string shipPostalCode,string shipCountry){

this.shipPostalCode = shipPostalCode;this.shipCountry = shipCountry;}

public int OrderID{

get{return this.orderID;

}set{this.orderID = value;

}}

public string CustomerID{

get{return this.customerID;

}set{this.customerID = value;

}}

public DateTime OrderDate{

get{return this.orderDate;

}set{this.orderDate = value;

}}

public DateTime ShipDate{

get{return this.shipDate;

}set{this.shipDate = value;

}}

public string ShipName{

get{return this.shipName;

}set{this.shipName = value;

}}

public string ShipAddress{

get{return this.shipAddress;

}set{this.shipAddress = value;

}}

public string ShipCity{

get{return this.shipCity;

}set{this.shipCity = value;

}}

public string ShipPostalCode{

get{return this.shipPostalCode;

}set{this.shipPostalCode = value;

}}

public string ShipCountry{

get{return this.shipCountry;

}set{this.shipCountry = value;

}}}}

Build Order Detail Task

The order detail represents the line items on the order This is analogous to the line items ofthe shopping cart Listings 15-9, 15-10, and 15-11 show the test, data, and business classes for the order detail, respectively

■ Note In the final source code for this iteration, the TestInsertLineItemis refactored into a

CreateOrderLineItemprivate method and used in the setup method for subsequent use by other

OrderDetailtest cases

Listing 15-9.OrderDetailTests.cs File

#region Using directive

private string userName;

private string userPassword;

private string userRole;

private string customerID;

private string companyName;

private string address;

private string city;

private string postalCode;

private string country;

private string phoneNumber;

private int orderID;

private DateTime orderDate;

private DateTime shipDate;

private int productID;

private string productName;

private decimal unitPrice;

private int quantityOrdered;

private int stockQuantity;

private int categoryID;

private LineItem lineItem;

private Product product;