swing JFrame setDefaultCloseOperation(int operation) does not handle invalid
param values properly. Values outside the valid range (0-2) are accepted. If
you use getDefaultCloseOperation the same invalid value will be returned.
If the param value is < 0 or > 2, then the default close operation should
be set to the default value (1, HIDE_ON_CLOSE) or a IllegalArgumentException
should be thrown.

/*
 * @(#)SetDefaultCloseOperationTest.java
 * @author Mike Colburn 06/08/99
 * @version 1.0
 * @bug
 *
 * swing.JFrame.setDefaultCloseOperation tests
 */

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.accessibility.*;

public class SetDefaultCloseOperationTest {

  public static void main(String[] args) {

    boolean status[];
    int passcount = 0, failcount = 0;
    int numTests = 4;
    int i, j = 0;
    
    status = new boolean[numTests];

    for( i = 0; i < numTests; ++i ) {
// Put all tests in try... catch block
       try {
++j;
switch (j) {
case 1:
status[i] = Test01();
break;
case 2:
status[i] = Test02();
break;
case 3:
status[i] = Test03();
break;
case 4:
status[i] = Test04();
break;
}

  } catch (Exception e) {
             status[i] = false;
System.out.println ("Exception in test "+j+": "+e.getMessage());
e.printStackTrace();
        }
    } // end for

    // Get pass and fail totals
    for( i = 0; i < numTests; ++i ) {
       if (status[i] == true)
passcount++;
else
failcount++;
    }
    
    System.out.println("Pass count: " + passcount); // debug
    System.out.println("Fail count: " + failcount); // debug

    // check if tests passed
    if ( failcount < 1 ) {
      System.out.println("Test for JFrame.setDefaultCloseOperation Passed");
      System.exit(0);
    } else {
      System.out.println("Test for JFrame.setDefaultCloseOperation Failed");
      System.exit(1);
    }
    
    
  } // end main
      
  /**
   * Test Test01: setDefaultCloseOperation param int operation
   * set to DO_NOTHING_ON_CLOSE
   */
  public static boolean Test01() {
    System.out.println("Test 1: DO_NOTHING_ON_CLOSE");
    boolean bReturn = false;
    String sText = "setDefaultCloseOperation test";
    String sParam;
    int iClose = WindowConstants.DO_NOTHING_ON_CLOSE;
           
    try {
     JFrame jf = new JFrame(sText);
      jf.setDefaultCloseOperation(iClose);
     
      int dco = jf.getDefaultCloseOperation();
      System.out.println ("getDefaultCloseOperation return: " + dco);
     
     jf.setLocation(200,200);
     jf.pack();
     jf.setVisible(true);
        
        jf.addWindowListener(new WindowAdapter() {
           public void windowClosing(WindowEvent e) {
         System.exit(0);
        }
        });

if (dco == iClose) {
bReturn = true;
     } else {
     bReturn = false;
     System.out.println("Expected "+iClose+", Returned "+dco);
     System.out.println("Test 1 Failed");
}
jf.dispose();
    } catch (Exception e) {
     bReturn = false;
        System.out.println("Unexpected Exception thrown " + e.getMessage());
       e.printStackTrace();
    }
    return bReturn;
  }
  
  /**
   * Test Test02: setDefaultCloseOperation param int operation
   * set to HIDE_ON_CLOSE
   */
  public static boolean Test02() {
    System.out.println("Test 2: HIDE_ON_CLOSE ");
    boolean bReturn = false;
    String sText = "setDefaultCloseOperation test";
    String sParam;
    int iClose = WindowConstants.HIDE_ON_CLOSE ;
           
    try {
     JFrame jf = new JFrame(sText);
      jf.setDefaultCloseOperation(iClose);
     
      int dco = jf.getDefaultCloseOperation();
      System.out.println ("getDefaultCloseOperation return: " + dco);
     
     jf.setLocation(200,200);
     jf.pack();
     jf.setVisible(true);
        
        jf.addWindowListener(new WindowAdapter() {
           public void windowClosing(WindowEvent e) {
         System.exit(0);
        }
        });

if (dco == iClose) {
bReturn = true;
     } else {
     bReturn = false;
     System.out.println("Expected "+iClose+", Returned "+dco);
     System.out.println("Test 2 Failed");
}
jf.dispose();
    } catch (Exception e) {
     bReturn = false;
        System.out.println("Unexpected Exception thrown " + e.getMessage());
       e.printStackTrace();
    }
    return bReturn;
  }
  
  /**
   * Test Test03: setDefaultCloseOperation param int operation
   * set to DISPOSE_ON_CLOSE
   */
  public static boolean Test03() {
    System.out.println("Test 3: DISPOSE_ON_CLOSE");
    boolean bReturn = false;
    String sText = "setDefaultCloseOperation test";
    String sParam;
    int iClose = WindowConstants.DISPOSE_ON_CLOSE;
           
    try {
     JFrame jf = new JFrame(sText);
      jf.setDefaultCloseOperation(iClose);
     
      int dco = jf.getDefaultCloseOperation();
      System.out.println ("getDefaultCloseOperation return: " + dco);
     
     jf.setLocation(200,200);
     jf.pack();
     jf.setVisible(true);
        
        jf.addWindowListener(new WindowAdapter() {
           public void windowClosing(WindowEvent e) {
         System.exit(0);
        }
        });

if (dco == iClose) {
bReturn = true;
     } else {
     bReturn = false;
     System.out.println("Expected "+iClose+", Returned "+dco);
     System.out.println("Test 3 Failed");
}
jf.dispose();
    } catch (Exception e) {
     bReturn = false;
        System.out.println("Unexpected Exception thrown " + e.getMessage());
       e.printStackTrace();
    }
    return bReturn;
  }
  
  /**
   * Test Test04: setDefaultCloseOperation param int operation
   * set to invalid value.
   */
  public static boolean Test04() {
    System.out.println("Test 4: param invalid");
    boolean bReturn = false;
    String sText = "setDefaultCloseOperation test";
    String sParam;
    int iClose = -1;
    int iExpect = 1; // default close operation HIDE_ON_CLOSE
           
    try {
     JFrame jf = new JFrame(sText);
      jf.setDefaultCloseOperation(iClose);
     
      int dco = jf.getDefaultCloseOperation();
      System.out.println ("getDefaultCloseOperation return: " + dco);
     
     jf.setLocation(200,200);
     jf.pack();
     jf.setVisible(true);
        
        jf.addWindowListener(new WindowAdapter() {
           public void windowClosing(WindowEvent e) {
         System.exit(0);
        }
        });

if (dco == iExpect) {
bReturn = true;
     } else {
     bReturn = false;
     System.out.println("Expected "+iExpect+", Returned "+dco);
     System.out.println("Test 4 Failed");
}
jf.dispose();
    } catch (Exception e) {
     bReturn = false;
        System.out.println("Unexpected Exception thrown " + e.getMessage());
       e.printStackTrace();
    }
    return bReturn;
  }
  
}