<p><b>@gravitystorm</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/2023#discussion_r225916686">app/controllers/application_controller.rb</a>:</p>
<pre style='color:#555'>> @@ -466,6 +468,23 @@ def better_errors_allow_inline
     raise
   end
 
+  def current_ability
+    Ability.new(current_user).merge(granted_capability)
</pre>
<p>The tests fail because in our controller tests, the controller state (e.g. instance variables) is not reset between each "request" - see <a class="issue-link js-issue-link" data-error-text="Failed to load issue title" data-id="148701889" data-permission-text="Issue title is private" data-url="https://github.com/rails/rails/issues/24566" data-hovercard-type="issue" data-hovercard-url="/rails/rails/issues/24566/hovercard" href="https://github.com/rails/rails/issues/24566">rails/rails#24566</a> . Calling <code>get</code> in a controller test isn't really making an http request, it just calls the methods on the controller object which exists for the length of the test.</p>
<p>So for a simple example, <code>site_controller_test#test_welcome</code> calls <code>get</code> twice. The memoized result from the first call means that the second logged-in call is also forbidden. This is, ultimately, because you're not really meant to make multiple requests in a single controller testcase - that should be in integration or system tests. But we do this a <strong>lot</strong> in our tests.</p>

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