Program: 20301
Project: 20301
Buggy source:
@Test public void listenableObjectSample(){
  try {
    EmptyWebDriver emptyWebDriver=new EmptyWebDriver();
    ContextAware contextAware=new ContextAware(){
      @Override public WebDriver context(      String name){
        return emptyWebDriver;
      }
      @Override public Set<String> getContextHandles(){
        return of(EMPTY);
      }
      @Override public String getContext(){
        return EMPTY;
      }
    }
;
    ContextListener2 contextListener=new ContextListener2();
    AlertListener2 alertListener=new AlertListener2();
    contextAware=getEventFiringObject(contextAware,emptyWebDriver,contextListener,alertListener);
    EmptyWebDriver webDriver=(EmptyWebDriver)contextAware.context("String_Node_Str");
    contextAware.context("String_Node_Str");
    assertNotNull(webDriver);
    assertThat(contextListener.messages,hasItems(PREFIX + "String_Node_Str",PREFIX + "String_Node_Str",PREFIX + "String_Node_Str",PREFIX + "String_Node_Str"));
    assertThat(contextListener.messages.size(),is(4));
    ContextListener singleContextListener=(ContextListener)listeners.get(ContextListener.class);
    assertThat(singleContextListener.messages,hasItems("String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str"));
    assertThat(singleContextListener.messages.size(),is(4));
    Alert alert=webDriver.switchTo().alert();
    alert.accept();
    alert.dismiss();
    alert.sendKeys("String_Node_Str");
    Credentials credentials=new Credentials(){
      @Override public int hashCode(){
        return super.hashCode();
      }
      @Override public String toString(){
        return "String_Node_Str";
      }
    }
;
    Credentials credentials2=new Credentials(){
      @Override public int hashCode(){
        return super.hashCode();
      }
      @Override public String toString(){
        return "String_Node_Str";
      }
    }
;
    alert.setCredentials(credentials);
    alert.authenticateUsing(credentials2);
    assertThat(alertListener.messages,hasItems(PREFIX + "String_Node_Str",PREFIX + "String_Node_Str",PREFIX + "String_Node_Str",PREFIX + "String_Node_Str",PREFIX + "String_Node_Str",PREFIX + "String_Node_Str",PREFIX + "String_Node_Str" + credentials.toString()+ "String_Node_Str",PREFIX + "String_Node_Str" + credentials.toString()+ "String_Node_Str",PREFIX + "String_Node_Str" + credentials2.toString()+ "String_Node_Str",PREFIX + "String_Node_Str" + credentials2.toString()+ "String_Node_Str"));
    assertThat(alertListener.messages.size(),is(10));
    AlertListener singleAlertListener=(AlertListener)listeners.get(AlertListener.class);
    assertThat(singleAlertListener.messages,hasItems("String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str" + credentials.toString() + "String_Node_Str","String_Node_Str" + credentials.toString() + "String_Node_Str","String_Node_Str" + credentials2.toString() + "String_Node_Str","String_Node_Str" + credentials2.toString() + "String_Node_Str"));
    assertThat(singleAlertListener.messages.size(),is(10));
    SearchingListener2 searchingListener=new SearchingListener2();
    webDriver=getEventFiringWebDriver(webDriver,searchingListener);
    webDriver.findElement(By.id("String_Node_Str"));
    assertThat(searchingListener.messages,hasItems(PREFIX + "String_Node_Str",PREFIX + "String_Node_Str" + "String_Node_Str"));
    assertThat(searchingListener.messages.size(),is(2));
    SearchingListener singleSearchingListener=(SearchingListener)listeners.get(SearchingListener.class);
    assertThat(singleSearchingListener.messages,hasItems("String_Node_Str","String_Node_Str" + "String_Node_Str"));
    assertThat(singleSearchingListener.messages.size(),is(2));
  }
  finally {
    listeners.get(ContextListener.class).messages.clear();
    listeners.get(AlertListener.class).messages.clear();
    listeners.get(SearchingListener.class).messages.clear();
  }
}

Fixed version (ground truth):
@Test public void listenableObjectSample(){
  try {
    ContextAware listenableContextAware=getEventFiringObject(contextAware,emptyWebDriver,contextListener,alertListener);
    WebDriver webDriver=listenableContextAware.context("String_Node_Str");
    assertTrue(contextAwarePredicate.test(listenableContextAware));
    Alert alert=webDriver.switchTo().alert();
    assertTrue(alertPredicate.test(alert));
    assertTrue(webDriverPredicate.test(getEventFiringWebDriver(webDriver,searchingListener)));
  }
  finally {
    listeners.get(ContextListener.class).messages.clear();
    listeners.get(AlertListener.class).messages.clear();
    listeners.get(SearchingListener.class).messages.clear();
  }
}