Getting started with Unit Testing and Moq — Part 2

In the previous post I started on a project to start learning about unit testing, specifically with moq and for WCF services. Thus far, we have only implemented basic unit tests for a piece of code with no external dependencies, which needed no mocking.

This time, I’m going to explore mocking and testing objects relying on the IDbGetSomeNumbers and INumberFunctions interfaces. As a reminder, those interfaces and corresponding classes are defined as:

namespace RussUnitTestSample.Business.Interface
{

    /// <summary>
    /// Interface for number functions
    /// </summary>
    public interface INumberFunctions
    {
        /// <summary>
        /// Add numbers together
        /// </summary>
        /// <param name="numbers">The numbers to add.
        /// <returns>The sum</returns>
        double AddNumbers(double[] numbers);
    }

    /// <summary>
    /// Interface to get some numbers from the database
    /// </summary>
    public interface IDbGetSomeNumbers
    {

        /// <summary>
        /// Get an array of doubles from the database
        /// </summary>
        /// <returns></returns>
        double[] GetSomeNumbers();
    }
}

And the class utilizing them:

namespace RussUnitTestSample.Business
{

    /// <summary>
    /// Get numbers and then add them together
    /// </summary>
    public class GetNumbersAndAddThem
    {

        #region Private
        private readonly IDbGetSomeNumbers _dbGetSomeNumbers;
        private readonly…