Listing 1. JUnit tests verify whether requirements are met and can be coded manually or generated automatically with a unit testing technology that creates JUnit test cases for every method in the source code. In this case we create the JUnit test class with a test case to test the getMortgageResponse() method.

public class RealtorServiceImplTest extends 
  PackageTestCase {
  /**
    * Test for method: getMortgageResponse(PaymentInfo)
    * @see RealtorServiceImpl#getMortgageResponse(
    *   PaymentInfo)
    * @author Jtest
    * @throws junit.framework.AssertionFailedError
    */
  public void testGetMortgageResponse() {
    PaymentInfo t0 = new PaymentInfo(7.0, 7.0, 7.0, 7);
    RealtorServiceImpl THIS = new RealtorServiceImpl();
    // jtest_tested_method
    double RETVAL = THIS.getMortgageResponse(t0);
    assertEquals(0.0, RETVAL, 0.0); // jtest_unverified
  }
  ... other test cases ...
}