Test Circuit to check if DAC is working
Yes, it is simple to test this chip. Apply the supply and the Vref  voltages. Tie the not WR line to VCC with a 10k resistor. Now tie the DB lines to ground or VCC to simulate the desired DAC output value. Briefly short the not WR pin to ground. The output of the DAC should now reflect the value of your DB pins in relation to Vref.