/** Test of printStatus method, of class Circulation. */
 @Test
 public void testPrintStatus() {
   System.out.println("printStatus");
   Circulation instance = new Circulation();
   String expResult = "";
   String result = instance.printStatus();
   assertEquals(expResult, result);
   // TODO review the generated test code and remove the default call to fail.
   fail("The test case is a prototype.");
 }