Test Hook
^^^^^
**Definition:**

* Conditional logic within the SUT determines whether the "real" code or test-specific logic is run.


**Code Example:**

.. code-block:: ruby

  class ApplicationController < ActionController::Base
    unless Rails.env.test?
      before_filter :require_login
    end
  end

**References:**

.. admonition:: Quality attributes

    * :octicon:`file-code;1em` -  Code Example
    * :octicon:`comment-discussion;1em` -  Cause and Effect
    * :octicon:`graph;1em` -  Frequency
    * :octicon:`sync;1em` -  Refactoring

* `Rails Testing Antipatterns <https://thoughtbot.com/upcase/videos/testing-antipatterns>`_ :octicon:`file-code;1em` :octicon:`sync;1em`
* `xUnit test patterns: Refactoring test code <https://books.google.com.br/books?hl=pt-BR&lr=&id=-izOiCEIABQC&oi=fnd&pg=PT19&dq=%22test+code%22+AND+(%22test*+smell*%22+OR+antipattern*+OR+%22poor+quality%22)&ots=YL71coYZkx&sig=s3U1TNqypvSAzSilSbex5lnHonk#v=onepage&q=%22test%20code%22%20AND%20(%22test*%20smell*%22%20OR%20antipattern*%20OR%20%22poor%20quality%22)&f=false>`_ :octicon:`file-code;1em` :octicon:`comment-discussion;1em` :octicon:`sync;1em`