Using a mock payment processor

using_mockpayment_processor.py

# this is really just an interface, but python doesn't really have interfaces
class PaymentProcessor():
    def make_payment(self, payment_info, amount):
       raise NotImplementedError()
    #any other helper methods & properties


# this technically implements payment processor, but doesn't do anything -- used for testing
class MockPaymentProcessor(PaymentProcessor):

	def make_payment(self, payment_info, amount):
		payment = Payment()
		payment.status = self.status
		return payment

	# this is one way to fake the response
	def always_return_status(self, status)
		self.status = "APPROVED"

# you can implement this if you figure out how to work with paypal
class PaypalPaymentProcessor(PaymentProcessor):

	def make_payment(self, payment_info, amount):
		payment = Payment()
		# TODO: implement whatever you need to do to actually call paypal and parse the response
		return payment


class CloudTestEnvironmentApp():
	#...
	def purchase(self, payment_info, order):
		#validate
		#log
		payment = pp.make_payment(payment_info, order.amount)
		db.session.save(payment)
		if (payment.status == "APPROVED"):
			db.session.save(payment)

		if (payment.status == "DECLINED"):
			raise PaymentException()

		# etc

		return payment




db = Whatever()
pp = MockPaymentProcessor()
pp.always_return_status("APPROVED")

app = CloudTestEnviromentApp(config=None, db=db, payment_processor=pp)
customer = app.register(customer_info)
order = app.order(order_info, customer)
payment = app.purchase(payment_info, order)