// Dumper dumper = new Dumper( ruleBase );
        // dumper.dumpReteToDot( System.err );
        workingMemory = getWorkingMemory( ruleBase );
        workingMemory.addEventListener( new TestWorkingMemoryEventListener( ) );
        workingMemory.setApplicationData( "fibtotal",
                                          new FibTotal( ) );
        // Assert the facts, and fire the rules.
        Fibonacci fibonacci = new Fibonacci( 50 );
        workingMemory.assertObject( fibonacci );
        // test serialization
        workingMemory = serializeWorkingMemory( workingMemory );
        workingMemory = serializeWorkingMemory( workingMemory );
        workingMemory.fireAllRules( );
        // test serialization
        workingMemory = serializeWorkingMemory( workingMemory );
        workingMemory = serializeWorkingMemory( workingMemory );
        // test context after serlisation
        assertNull( workingMemory.getRuleBase( ).getRuleBaseContext( ).get( "java-classLoader" ) );
        // test application ran correctly
        assertEquals( 2,
                      workingMemory.getObjects( ).size( ) );
        Fibonacci a = (Fibonacci) workingMemory.getObjects( ).get( 0 );
        Fibonacci b = (Fibonacci) workingMemory.getObjects( ).get( 1 );
        assertEquals( 50,
                      a.getSequence( ) );
        assertEquals( 49,
                      b.getSequence( ) );
        assertEquals( 12586269025L,
                      a.getValue( ) );
        assertEquals( 7778742049L,
                      b.getValue( ) );
        // test application data
        FibTotal total = (FibTotal) workingMemory.getApplicationData( "fibtotal" );
        assertEquals( 50,
                      total.getTotal( ) );
        // test listener
        TestWorkingMemoryEventListener listener = (TestWorkingMemoryEventListener) workingMemory.getEventListeners( ).get( 0 );
        assertEquals( 50,
                      listener.asserted );
        assertEquals( 48,
                      listener.retracted );
        assertEquals( 50,