Singular Component Variable/Constant/Timer Reference
^^^^^
**Definition:**

* A component variable, constant or timer is referenced by one single function, test case or altstep only, although other behavioral entities run on the component as well.

**Code Example:**

.. code-block:: pseudo

  module SingularComponentVCTReference {
    type port ExamplePort message {
      inout charstring;
    }

    type component c {
      timer t;
      port ExamplePort p;
    }

    function f() runs on c {
      p.send("bar");
      p.send("baz");
    }

    testcase tc() runs on c {
      t.start(10.0);
      alt {
        [] p.receive("foo") {
          p.send("bar");
        }
        [] any port.receive {
          // error handling
        }
        [] t.timeout {
          // error handling
        }
      }
    }
  }


**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

* `An approach to quality engineering of TTCN-3 test specifications <https://link.springer.com/article/10.1007/s10009-008-0075-0>`_
* `Pattern-based Smell Detection in TTCN-3 Test Suites <http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.144.6997&rep=rep1&type=pdf>`_ :octicon:`file-code;1em` :octicon:`comment-discussion;1em` :octicon:`sync;1em`
* `Utilising Code Smells to Detect Quality Problems in TTCN-3 Test Suites <https://link.springer.com/chapter/10.1007/978-3-540-73066-8_16>`_