def test_multieple_currencies(self):
c1 = factories.CurrencyTypeFactory(pk=2)
c2 = factories.CurrencyTypeFactory(pk=1)
c3 = factories.CurrencyTypeFactory(pk=3)
receipt = models.Receipt()
self.assertNotEqual(receipt.currency, c1)
self.assertEqual(receipt.currency, c2)
self.assertNotEqual(receipt.currency, c3)
def test_no_currencies(self):
receipt = models.Receipt()
with self.assertRaises(models.CurrencyType.DoesNotExist):
receipt.currency