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POHow do I mock IQueryable<T>
 

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  1. POHow do I mock IQueryable<T>
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    <p>I am creating a repository that exposes IQueryable. What is the best way to mock this out for my unit testing?</p> <p>Since I am using RhinoMocks for the rest of my mock objects, I tried to do the following:</p> <pre><code>IQueryable&lt;MyObject&gt; QueryObject = MockRepository.GenerateStub&lt;IQueryable&lt;MyObject&gt;&gt;(); </code></pre> <p>This doesn't work though so I tried doing this:</p> <pre><code>IQueryable&lt;MyObject&gt; QueryObject = (new List&lt;MyObject&gt; { new MyObject() }).AsQueryable(); </code></pre> <p>Is there a better way to do this, or have any other mocking frameworks built support for IQueryable in?</p> <p>My repository interface looks like this:</p> <pre><code>public interface IRepository&lt;T&gt; where T : TableServiceEntity { IQueryable&lt;T&gt; Table { get; } void Attach(T existingItem); void Delete(T itemToDelete); void Insert(T newItem); T Load(string partitionKey, string rowKey); IEnumerable&lt;T&gt; Load(string partitionKey); IEnumerable&lt;T&gt; Query(IQueryable&lt;T&gt; query); IEnumerable&lt;T&gt; Last(int count); T Last(); void Update(T item); } </code></pre> <p>Here is the method that I want to test:</p> <pre><code>public Post LoadPost(int year, int month, int day, string slug) { var query = from p in _blogRepository.Table where p.PartitionKey == Key.Partition(year, month, day) &amp;&amp; p.Slug == slug select p; var posts = _blogRepository.Query(query.Take(1)); return posts.First(); } </code></pre> <p>Then here is the test as I have it right now that will test LoadPost.</p> <pre><code>[Fact] public void LoadWillRetrieveByPartitionKeyAndRowKeyWhenUsingUriFormat() { Repository .Stub(x =&gt; x.Query(Arg&lt;IQueryable&lt;Post&gt;&gt;.Is.Anything)) .Return(new List&lt;Post&gt; {_post}); var result = Service.LoadPost( _post.Year(), _post.Month(), _post.Day(), _post.Slug); Assert.NotNull(result); } </code></pre> <p>The code is taken from my <a href="http://azureblog.codeplex.com">AzureBlog</a> project.</p>
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