source: main/waeup.ikoba/branches/uli-payments/src/waeup/ikoba/payments/tests/test_payment.py @ 12697

## $Id$
##
## Copyright (C) 2014 Uli Fouquet & Henrik Bettermann
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
import datetime
import decimal
import re
import unittest
from zope.component import getUtilitiesFor, getSiteManager, queryUtility
from zope.interface import implements
from zope.interface.verify import verifyClass, verifyObject
from waeup.ikoba.payments.interfaces import (
    IPayment, STATE_UNPAID, STATE_PAID, STATE_FAILED,
    IPaymentGatewayService, IPaymentItem, IPaymentGatewayServicesLister,
    )
from waeup.ikoba.payments.payment import (
    Payment, get_payment_providers, PaymentItem, format_payment_item_values,
    )
from waeup.ikoba.testing import (FunctionalLayer, FunctionalTestCase)


class HelperTests(unittest.TestCase):

    def tearDown(self):
        # unregister any IPaymentGatewayServices
        sm = getSiteManager(None)
        for name, util in getUtilitiesFor(IPaymentGatewayService):
            sm.unregisterUtility(util, name=name)

    def test_get_payment_providers_no_providers(self):
        # we can get a dict of all payment providers
        result = get_payment_providers()
        assert isinstance(result, dict)
        assert result == {}

    def test_get_payment_providers(self):
        # we get any payment providers registered
        sm = getSiteManager(None)

        class FakeUtil(object):
            implements(IPaymentGatewayService)

        fake_util = FakeUtil()
        sm.registerUtility(fake_util, name=u'some_name')
        result = get_payment_providers()
        assert isinstance(result, dict)
        assert result.keys() == ['some_name', ]
        assert result['some_name'] is fake_util

    def test_format_payment_item_values(self):
        # we can format lists of payment item values
        result = format_payment_item_values(
            [(u'Item 1', 'USD', decimal.Decimal("12.123")),
             (u'Item 2', 'USD', decimal.Decimal("12.002")),
             ], 'USD')
        self.assertEqual(
            result, [(u'Item 1', 'USD 12.12'),
                     (u'Item 2', 'USD 12.00'),
                     (u'Total', 'USD 24.12')]
            )

    def test_format_payment_item_values_req_single_currency(self):
        # we require one currency for all items, yet.
        self.assertRaises(
            ValueError, format_payment_item_values,
            [(u'Item 1', 'USD', decimal.Decimal("12.12")),
             (u'Item 2', 'EUR', decimal.Decimal("50")),
             ],
            'USD')


class FunctionalHelperTests(FunctionalTestCase):

    layer = FunctionalLayer

    def test_services_lister_is_registered(self):
        # a lister of gateway services is registered on startup
        util = queryUtility(IPaymentGatewayServicesLister)
        assert util is not None

    def test_services_are_really_listed(self):
        # we can really get locally registered gateways when calling
        util = queryUtility(IPaymentGatewayServicesLister)
        assert len(util()) > 0


class PaymentTests(unittest.TestCase):

    def test_iface(self):
        # Payments fullfill any interface contracts
        obj = Payment()
        verifyClass(IPayment, Payment)
        verifyObject(IPayment, obj)

    def test_payment_id_unique(self):
        # we get unique payment ids
        p1, p2 = Payment(), Payment()
        id1, id2 = p1.payment_id, p2.payment_id
        assert id1 != id2

    def test_payment_id_format(self):
        # payment ids have a special format: "PAY_<32 hex digits>"
        id1 = Payment().payment_id
        assert isinstance(id1, basestring)
        assert re.match('PAY_[0-9a-f]{32}', id1)

    def test_initial_state_is_unpaid(self):
        # the initial state of payments is <unpaid>
        p1 = Payment()
        assert p1.state == STATE_UNPAID

    def test_approve(self):
        # we can approve payments
        p1 = Payment()
        p1.approve()
        assert p1.state == STATE_PAID
        assert p1.payment_date is not None
        assert isinstance(p1.payment_date, datetime.datetime)

    def test_approve_datetime_given(self):
        # we can give a datetime
        p1 = Payment()
        some_datetime = datetime.datetime(2014, 1, 1, 0, 0, 0)
        p1.approve(payment_date=some_datetime)
        assert p1.payment_date == some_datetime

    def test_approve_datetime_automatic(self):
        # if we do not give a datetime, current one will be used
        current = datetime.datetime.utcnow()
        p1 = Payment()
        p1.approve()
        assert p1.payment_date >= current

    def test_mark_failed(self):
        # we can mark payments as failed
        p1 = Payment()
        p1.mark_failed()
        assert p1.state == STATE_FAILED

    def test_add_payment_item(self):
        # we can add payment items
        p1 = Payment()
        item1 = PaymentItem()
        result = p1.add_payment_item(item1)
        assert len(p1) == 1  # do not make assumptions about result content
        assert isinstance(result, basestring)

    def test_add_payment_item_multiple(self):
        # we can add several items
        p1 = Payment()
        item1 = PaymentItem()
        item2 = PaymentItem()
        result1 = p1.add_payment_item(item1)
        result2 = p1.add_payment_item(item2)
        assert len(p1) == 2  # do not make assumptions about result content
        assert isinstance(result1, basestring)
        assert isinstance(result2, basestring)

    def test_amount(self):
        # the amount of a payment is the sum of amounts of its items
        p1 = Payment()
        item1 = PaymentItem()
        item2 = PaymentItem()
        p1.add_payment_item(item1)
        p1.add_payment_item(item2)
        item1.amount = decimal.Decimal("12.25")
        item2.amount = decimal.Decimal("0.5")
        assert p1.amount == decimal.Decimal("12.75")

    def test_amount_negative(self):
        # we can sum up negative numbers
        p1 = Payment()
        item1 = PaymentItem()
        item2 = PaymentItem()
        p1.add_payment_item(item1)
        p1.add_payment_item(item2)
        item1.amount = decimal.Decimal("2.21")
        item2.amount = decimal.Decimal("-3.23")
        assert p1.amount == decimal.Decimal("-1.02")

    def test_amount_empty(self):
        # the amount of zero items is 0.00.
        p1 = Payment()
        assert p1.amount == decimal.Decimal("0.00")
        assert isinstance(p1.amount, decimal.Decimal)


class PaymentItemTests(unittest.TestCase):

    def test_iface(self):
        # PaymentItems fullfill any interface contracts
        obj = PaymentItem()
        verifyClass(IPaymentItem, PaymentItem)
        verifyObject(IPaymentItem, obj)