package org.apidesign.deadlock;

 import org.junit.Test;

 import static org.junit.Assert.*;

 public class SynchronizedFieldsInternallyTest {

     public SynchronizedFieldsInternallyTest() {

     }

     @Test

     public void increment() {

         SynchronizedFieldsInternally instance = new SynchronizedFieldsInternally();

         instance.increment();

     }

     @Test

     public void unsafeDecrement() {

         SynchronizedFieldsInternally instance = new SynchronizedFieldsInternally();

         try {

             instance.unsafeDecrement();

         } catch (java.lang.AssertionError ex) {

             // OK

             return;

         }

         fail("This will fail as unsafeDecrement is not synchronized, and that" +

             "is why it cannot access the field using getter and setter"

         );

     }

     @Test

     public void fixUnsafeDecrementFromOutside() {

         SynchronizedFieldsInternally instance = new SynchronizedFieldsInternally();

         try {

             synchronized (instance) {

                 instance.unsafeDecrement();

             }

         } catch (AssertionError ex) {

             // OK

             return;

         }

         fail("Unlike the SynchronizedFieldsTest, the fix by wrapping instance" +

             "into own synchronized block will not help, neither any other" +

             "fix, the lock is really private"

         );

     }

 }