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POC# + Mock service layer?
 

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    <p>I have just started playing with unit testing / mocks using Moq, and ran into a problem..</p> <p>I have a Service layer named "CustomerService" which have following code:</p> <pre><code>public interface ICustomerService { Customer GetCustomerById(int id); } public class CustomerService : ICustomerService { private IRepository&lt;Customer&gt; customerRepository; public CustomerService(IRepository&lt;Customer&gt; rep) { customerRepository = rep; } public Customer GetCustomerById(int id) { var customer = customerRepository.Get(x =&gt; x.CustomerId == id); if (customer == null) return null; return customer; } } </code></pre> <p>My repository class is generic, and are following:</p> <pre><code>public interface IRepository&lt;T&gt; : IDisposable where T : class { T Get(Expression&lt;Func&lt;T, bool&gt;&gt; predicate); } public class Repository&lt;T&gt; : IRepository&lt;T&gt; where T : class { private ObjectContext context; private IObjectSet&lt;T&gt; objectSet; public Repository() : this(new demonEntities()) { } public Repository(ObjectContext ctx) { context = ctx; objectSet = context.CreateObjectSet&lt;T&gt;(); } public T Get(Expression&lt;Func&lt;T, bool&gt;&gt; predicate) { T entity = objectSet.Where&lt;T&gt;(predicate).FirstOrDefault(); if (entity == null) return null; return objectSet.Where&lt;T&gt;(predicate).FirstOrDefault(); } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (disposing) { if (context != null) { context.Dispose(); context = null; } } } } </code></pre> <p>Now is my question.. How can I make unit test to check whether my GetCustomerById returns null or not?</p> <p>Already tried:</p> <pre><code>[TestMethod] public void GetCustomerTest() { const int customerId = 5; var mock = new Mock&lt;IRepository&lt;Customer&gt;&gt;(); mock.Setup(x =&gt; x.Get(z =&gt; z.CustomerId == customerId)) .Returns(new Customer()); var repository = mock.Object; var service = new CustomerService(repository); var result = service.GetCustomerById(customerId); Assert.IsNotNull(result); } </code></pre> <p>without luck...</p>
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    1. USrazlebe
    1. USebb
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      1. USMartin Fabik
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    1. COby passing in a mock repository. call with an id not in the mock repository. BTW, it's not much of a test....
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      1. USMitch Wheat
    2. COalready tried that without luck...
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