def test_exchange(self):
#
# Exchange USD to EUR rate 1.5 amount 10 gain 0
#
transaction = Transaction(user=self.user, template=self.usd_eur,
rate=1.5,
source_amount=10)
transaction.save()
self.assertEqual(transaction.source.balance, 90.0)
self.assertEqual(transaction.destination.balance, 15.0)
self.assertEqual(transaction.rest, 15.0)
self.assertEqual(transaction.gain, None)
#
# Exchange USD to EUR rate 1.5 amount 10 gain 0
#
transaction = Transaction(user=self.user, template=self.usd_eur,
rate=1.5, source_amount=10)
transaction.save()
self.assertEqual(transaction.source.balance, 80.0)
self.assertEqual(transaction.destination.balance, 30.0)
self.assertEqual(transaction.rest, 15.0)
self.assertEqual(transaction.gain, None)
#
# Exchange EUR to USD rate 0.8 amount 10 gain 1.333333333333333
#
transaction = Transaction.objects.create(user=self.user,
template=self.eur_usd, rate=0.8, source_amount=10)
transaction = Transaction.objects.get(pk=transaction.pk)
self.assertEqual(transaction.source.balance, 20.0)
self.assertEqual(transaction.destination.balance, 88.0)
self.assertEqual(transaction.rest, 8.0)
self.assertEqual(transaction.gain, 1.333333333333333)
#
# Exchange EUR to USD rate 0.8 amount 20 gain 2.6666666666666665
#
transaction = Transaction.objects.create(user=self.user,
template=self.eur_usd, rate=0.8, source_amount=20)
transaction = Transaction.objects.get(pk=transaction.pk)
self.assertEqual(transaction.source.balance, 0.0)
self.assertEqual(transaction.destination.balance, 104.0)
self.assertEqual(transaction.rest, 16.0)
self.assertEqual(transaction.gain, 2.6666666666666665)
#
# Delete last transaction
#
transaction.delete()
transactions = Transaction.objects.filter(template=self.usd_eur)
self.assertEqual(transactions[0].rest, 15.0)
self.assertEqual(transactions[1].rest, 5.0)
def test_withdrawal(self):
transaction = Transaction(user=self.user, template=self.withdraw,
source_amount=50.0)
transaction.save()
self.assertEqual(transaction.source.balance, 50.0)
def test_deposits(self):
transaction = Transaction(user=self.user, template=self.deposits,
source_amount=100.0)
transaction.save()
self.assertEqual(transaction.destination.balance, 200.0)
