// calling addColumn with a column not created by the given model/implementatoion should not succeed
boolean caughtExpected = false;
try
{
m_columnModel.addColumn( new DummyColumn() );
}
catch( final com.sun.star.lang.IllegalArgumentException e )
{
assertTrue( impl_areSameInterface( e.Context, m_columnModel ) );
caughtExpected = true;