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    <blockquote> <p>i have two methods that i want to test "LoadAllaEscorts" and "SelectedEscorts"</p> </blockquote> <p>Those are methods on an interface. You don't write tests against an interface, or against mock objects. You write tests against concrete classes.</p> <p>Somewhere you have an EscortRepository that implements IEscortRepository. I'm assuming that hits the database. Write integration tests against that.</p> <p>Elsewhere in your code you probably have a class (call it "Foo") that has an IEscortRepository dependency injected into it (such as via a constructor parameter). When you want to write tests against the Foo class, you would use Moq to create a mock IEscortRepository returning fixed test data and pass that mock object into your Foo instance.</p> <p>Another issue is that your IEscortRepository methods are returning (or taking as a parameter) List&lt;PartialPerson&gt;. Those should be IList&lt;IPartialPerson&gt; (or IEnumerable&lt;T&gt;, ICollection&lt;T&gt;, or ReadOnlyCollection&lt;T&gt;). The most important part is that the collection items should be an interface type (IPartialPerson).</p> <p>+1 for magnifico, who had the code right:</p> <pre><code>using System; using System.Collections.Generic; using Moq; namespace ConsoleApplication1 { internal class Program { private static void Main(string[] args) { var newProduct = new Mock&lt;IPartialPerson&gt;(); newProduct.SetupGet(p =&gt; p.FirstName).Returns("FirstName"); newProduct.SetupGet(p =&gt; p.MiddleName).Returns("MiddleName"); newProduct.SetupGet(p =&gt; p.LastName).Returns("LastName"); newProduct.SetupGet(p =&gt; p.EmailAddress).Returns("EmailAddress@hotmail.com"); newProduct.SetupGet(p =&gt; p.UserID).Returns("UserID"); var mockEscortRepository = new Mock&lt;IEscortRepository&gt;(); mockEscortRepository .Setup(p =&gt; p.LoadAllEscorts()) .Returns(new List&lt;IPartialPerson&gt; {newProduct.Object}); IEscortRepository repository = mockEscortRepository.Object; IList&lt;IPartialPerson&gt; escorts = repository.LoadAllEscorts(); foreach (IPartialPerson person in escorts) { Console.WriteLine(person.FirstName + " " + person.LastName); } Console.ReadLine(); // Outputs "FirstName LastName" } } public interface IPartialPerson { string FirstName { get; } string MiddleName { get; } string LastName { get; } string EmailAddress { get; } string FullName { get; } string UserID { get; } } public interface IEscortRepository { IList&lt;IPartialPerson&gt; LoadAllEscorts(); IList&lt;IPartialPerson&gt; SelectedEscorts(IList&lt;IPartialPerson&gt; selectedEscorts); } } </code></pre> <p>(The above example is <strong>not</strong> a unit test; it just shows that Moq works.)</p> <p>Note that you don't have to use SetupGet for properties; Setup works as well.</p>
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