test/jdk/java/awt/event/InputEvent/ButtonArraysEquality/ButtonArraysEquality.java

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/*
  @test %I% %E%
  @key headful
  @bug 6315717
  @summary verifies that InputEvents button masks arrays are the same
  @author Andrei Dmitriev : area=awt.event
  @modules java.desktop/java.awt.event:open
  @run main ButtonArraysEquality
 */

import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*;

// get array InputEvent.BUTTON_MASK via reflection
// get array InputEvent.BUTTON_DOWN_MASK via reflection
// compare their lengths and values

public class ButtonArraysEquality {
    static int [] eventDownMask = new int []{InputEvent.BUTTON1_DOWN_MASK, InputEvent.BUTTON2_DOWN_MASK, InputEvent.BUTTON3_DOWN_MASK};

    public static void main(String []s){
        int [] buttonDownMasksAPI = new int [MouseInfo.getNumberOfButtons()];
        for (int i = 0; i < MouseInfo.getNumberOfButtons(); i++){
            buttonDownMasksAPI[i] = InputEvent.getMaskForButton(i+1);
            System.out.println("TEST: "+buttonDownMasksAPI[i]);
        }

        // getButtonDownMasks()
        Object obj =  null;

        try {
            Class clazz = Class.forName("java.awt.event.InputEvent");
            Method method  = clazz.getDeclaredMethod("getButtonDownMasks",new Class [] {});
            if (method != null) {
                method.setAccessible(true);
                obj = method.invoke(null, (Object[])null);
            }
        } catch (Exception e) {
            throw new RuntimeException("Test failed. Exception occurred:", e);
        }

        int [] buttonDownMasks = new int [Array.getLength(obj)];
        checkNullAndPutValuesToArray(buttonDownMasks, obj);

        //check lengths: array shouldn't contain less elements then the number of buttons on a mouse
        if (buttonDownMasks.length < buttonDownMasksAPI.length){
            throw new RuntimeException("Test failed. The lengths array is less than the number of buttons");
        }

        // verify values for first three buttons
        for (int i = 0; i < 3; i++) {
            if (eventDownMask[i] != buttonDownMasks[i])
            {
                System.out.println("Test : "+ i + " | " + " | " +eventDownMask[i] + " | "+ buttonDownMasks[i]);
                throw new RuntimeException("Failure: masks are not correct for standard buttons");
            }
        }

        // verify values for extra buttons if any
        for (int i = 3; i < MouseInfo.getNumberOfButtons(); i++) {
            if (buttonDownMasksAPI[i] != buttonDownMasks[i]) {
                throw new RuntimeException("Failure: masks are not the same for extra buttons");
            }
        }
        System.out.println("Test passed.");
    }

    public static void checkNullAndPutValuesToArray(int [] array, Object obj){
        if (obj == null){
            throw new RuntimeException("Test failed. The array obtained via reflection is "+obj);
        }

        for (int i = 0; i < Array.getLength(obj); i++){
            System.out.println("Test (Reflection): "+ Array.getInt(obj, i));
            array[i] = Array.getInt(obj, i);
        }
    }
}