Is there a way to trigger a manually trigger events in Java Unit Testing

manpreet Best Answer 2 years ago

I need to trigger manual event for a ListSelectionListener within my unit test. Is there a way to do this or any workaround to test code inside triggered code?

private ListSelectionListener getLeftListSelectionListner()
{
  return e -> {
    if (!leftSelector.getSelectedValueList().isEmpty())
    {
      rightSelector.getSelectionModel().clearSelection();
      getAddBtn().setEnabled(true);
    }
    else
    {
      getAddBtn().setEnabled(false);
    }
  };
}

manpreet 2 years ago

Thanks to @Maurice Perry I have figured out an unit test for this situation.

  @Test
  public void testGetRightListSelectionListner()
  {
    MultipleSelectionEditor multipleSelectionEditor = new MultipleSelectionEditor();
    ListSelectionEvent listSelectionEvent = mock(ListSelectionEvent.class);

    multipleSelectionEditor.getLeftListSelectionListner().valueChanged(listSelectionEvent);

  }

In this case I have mocked ListSelectionEvent and called valueChanged with that mocked event