Asan, this is a unit testing framework to help ensure your MATLAB programs have been written correctly and to prevent changes from introducing bugs. There is now a unit test framework included in MATLAB, and you may be interested in the following blog post describing how someone can use such a framework to ensure the quality of science & engineering:
I tried to understand 'MATLAB xUnit Test Framework' from description but unfortunately the most part I couldn't understand, can tell me is useful for what in more simple way, sorry I'm new user of MATLAB
In R2013a, a curious glitch has emerged in the behavior of the documentation. When I type 'doc', go to the home page, and click on 'Supplemental Software', I get the documentation for this package (and some others). However, the display flickers. MATLAB Support uncovered the source of the problem: the line
<meta http-equiv="REFRESH" content="0;url=xunit_product_page.html">
in the file index.html.
The fix was to delete index.html and replace it with a copy of xunit_product_page.html, renamed to index.html.
Keith - On my Mac, MATLAB xUnit passes 150 of the 151 test cases in its own test suite. (The one failure seems to be a bad test case.) Use the contact form on my author page (http://www.mathworks.com/matlabcentral/fileexchange/authors/22204) to send me more details about the problem you are experiencing.