ry methods must always have
   arguments and therefore appears quite similar to
   <a href="parameterizedTests.html">Parameterized Tests</a>   at first glance. However, a Theory incorporates additional data sources
   for its arguments and allows special processing for assumptions
   about that data. The key difference, though, is that theories
   make general statements and are more than just a set of examples.

<h4>Data for Theories</h4>

<p>The primary source of data for a <b>Theory</b> is the
   <a href