Sample Project for Creating Unit Tests

This sample code is provided for use in the following walkthroughs:

• Walkthrough: Creating and Running Unit Tests for Managed Code. This walkthrough leads you through the steps to create and customize unit tests, run them, and examine the test results.

• Walkthrough: Run Tests and View Code Coverage. This walkthrough illustrates how to view code coverage data, which shows the proportion of your project's code that is being tested.

• Walkthrough: using the command-line test utility. In this walkthrough, you use the MSTest.exe command-line utility to run tests and view results.

Sample Code

The only intentional error in this sample is that the in Debit method "m_balance += amount" should have a minus not a plus sign before the equals sign.

using System; 

namespace BankAccountNS
{
    /// <summary> 
    /// Bank Account demo class. 
    /// </summary> 
    public class BankAccount
    {
        private string m_customerName;

        private double m_balance;

        private bool m_frozen = false;

        private BankAccount()
        {
        }

        public BankAccount(string customerName, double balance)
        {
            m_customerName = customerName;
            m_balance = balance;
        }

        public string CustomerName
        {
            get { return m_customerName; }
        }

        public double Balance
        {
            get { return m_balance; }
        }

        public void Debit(double amount)
        {
            if (m_frozen)
            {
                throw new Exception("Account frozen");
            }

            if (amount > m_balance)
            {
                throw new ArgumentOutOfRangeException("amount");
            }

            if (amount < 0)
            {
                throw new ArgumentOutOfRangeException("amount");
            }

            m_balance += amount; // intentionally incorrect code
        }

        public void Credit(double amount)
        {
            if (m_frozen)
            {
                throw new Exception("Account frozen");
            }

            if (amount < 0)
            {
                throw new ArgumentOutOfRangeException("amount");
            }

            m_balance += amount;
        }

        private void FreezeAccount()
        {
            m_frozen = true;
        }

        private void UnfreezeAccount()
        {
            m_frozen = false;
        }

        public static void Main()
        {
            BankAccount ba = new BankAccount("Mr. Bryan Walton", 11.99); 

            ba.Credit(5.77);
            ba.Debit(11.22);
            Console.WriteLine("Current balance is ${0}", ba.Balance);
        }

    }
}

/* The example companies, organizations, products, ___domain names, e-mail addresses, logos, people, places, and events depicted herein are fictitious. No association with any real company, organization, product, ___domain name, email address, logo, person, places, or events is intended or should be inferred. */

Working with the Code

To work with this code, you first have to create a project for it in Visual Studio. Follow the steps in the "Prepare the Walkthrough" section in Walkthrough: Creating and Running Unit Tests for Managed Code.

See Also

Tasks

Walkthrough: Creating and Running Unit Tests for Managed Code

Walkthrough: using the command-line test utility

Other Resources

Walkthrough: Run Tests and View Code Coverage