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POWriting a test for a Rails 3 model method that involves multiple associations
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  1. POWriting a test for a Rails 3 model method that involves multiple associations
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    copied!<p>I'm new to the concept of test-driven development (and fairly new to Rails). I'm stuck with how to approach writing a test for my application.</p> <p>As a backgrounder, the web app is a peer evaluation tool where individual groups are assigned surveys where they are asked to evaluate their peers. So a sample question would look like this:</p> <pre><code>Rate your peers on time management. - Peer 1: __ - Peer 2: __ - Yourself: __ </code></pre> <p>How I have this set up internally is as so:</p> <p>I have a <code>Survey</code> model with a <code>has_many</code> association to an <code>Assignment</code> model (which controls the visibility of surveys among groups), which acts as a join model for <code>Survey</code> and a <code>Group</code> model. In the <code>Group</code> model there is a <code>has_many</code> association with <code>User</code>s. </p> <p>Because multiple groups can be assigned the same survey, I have to find out which <code>Group</code> a certain user is asked to evaluate. (So the survey would be the same, but the people that show up as in the sample above would change from user to user). </p> <p>I have decided to create a method, <code>assignees_for_user(user)</code>, which would return, essentially, the user's group(s) that have been assigned to the survey.</p> <p>I want to be able to unit test this method. I am using rspec and factory_girl so far. I have a few questions:</p> <ol> <li>Is my approach even correct design-wise?</li> <li>Should I test this? If so, I'll need to create instances for <code>Assignment</code>, <code>Group</code>, and <code>User</code>, right? </li> <li>What's the best way I can stub/mock these instances without persisting them onto the database? Or will I have to? </li> </ol> <p>Thanks! </p>
 

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