The Sleeper
^^^^^
**Definition:**

* A test that is destined to fail at some specific time and date in the future. This is often caused by incorrect bounds checking when testing code which uses a Date or Calendar object. Sometimes, the test may fail if run at a very specific time of day, such as midnight.

**Also Known As:**

* Mount Vesuvius

**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

* `Anti-Patterns - Digital Tapestry <https://digitaltapestry.net/testify/manual/AntiPatterns.html>`_
* `Categorising Test Smells <https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.696.5180&rep=rep1&type=pdf>`_ :octicon:`graph;1em`
* `Unit testing Anti-patterns catalogue <https://stackoverflow.com/questions/333682/unit-testing-anti-patterns-catalogue>`_