void performAcceptanceTestAddClient(Customer customer){
        CustomerIdTextField.setText(Integer.toString(customer.getPersonalId()));
        CustomerNameTextField.setText(customer.getFirstName());
        CustomerSurnameTextField.setText(customer.getLastName());
        try {
            Thread.sleep(1000);
        } catch (InterruptedException ex) {
            Logger.getLogger(CustomerInputForm.class.getName()).log(Level.SEVERE, null, ex);
        }
        addButton.doClick();        
        
    }