Hidden Integration Test
^^^^^
**Definition:**

* A PUT outcome depends on the state of the environment.


**Code Example:**

.. code-block:: csharp

  [PexMethod]
  void FileExists(string fileName) {
  if (!File.Exists(fileName))
  throw new FileNotFoundException();
  ...
  }

**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

* `Parameterized Test Patterns For Effective Testing with Pex <http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.159.6145&rep=rep1&type=pdf>`_ :octicon:`file-code;1em` :octicon:`comment-discussion;1em` :octicon:`sync;1em`