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POHow to unit test an Action method which returns JsonResult?
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  1. POHow to unit test an Action method which returns JsonResult?
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    copied!<p>If I have a controller like this:</p> <pre><code>[HttpPost] public JsonResult FindStuff(string query) { var results = _repo.GetStuff(query); var jsonResult = results.Select(x =&gt; new { id = x.Id, name = x.Foo, type = x.Bar }).ToList(); return Json(jsonResult); } </code></pre> <p>Basically, I grab stuff from my repository, then project it into a <code>List&lt;T&gt;</code> of anonymous types.</p> <p>How can I unit-test it?</p> <p><code>System.Web.Mvc.JsonResult</code> has a property called <code>Data</code>, but it's of type <code>object</code>, as we expected.</p> <p>So does that mean if I want to test that the JSON object has the properties I expect ("id", "name", "type"), I have to use reflection?</p> <p><strong>EDIT:</strong></p> <p>Here's my test:</p> <pre><code>// Arrange. const string autoCompleteQuery = "soho"; // Act. var actionResult = _controller.FindLocations(autoCompleteQuery); // Assert. Assert.IsNotNull(actionResult, "No ActionResult returned from action method."); dynamic jsonCollection = actionResult.Data; foreach (dynamic json in jsonCollection) { Assert.IsNotNull(json.id, "JSON record does not contain \"id\" required property."); Assert.IsNotNull(json.name, "JSON record does not contain \"name\" required property."); Assert.IsNotNull(json.type, "JSON record does not contain \"type\" required property."); } </code></pre> <p>But I get a runtime error in the loop, stating "object does not contain a definition for id". </p> <p>When I breakpoint, <code>actionResult.Data</code> is defined as a <code>List&lt;T&gt;</code> of anonymous types, so I figure if I enumerate through these, I can check the properties. Inside the loop, the object <strong>does</strong> have a property called "id" - so not sure what the issue is.</p>
 

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