/**
  * Test get_ext()
  */
 function testGetExt()
 {
     $File = new File('user', 1, 'abc.def');
     $this->assertEqual($File->get_ext(), 'def', 'Simple file extension recognized.');
     $File = new File('user', 1, 'abc.noext.def');
     $this->assertEqual($File->get_ext(), 'def', 'File extension recognized.');
 }