def setUp(self):
"""
our test bank has two accounts: wanda and rufus.
"""
self.clerk = MockClerk(schema)
self.clerk.store(Account(username="******"))
self.clerk.store(Account(username="******"))
self.bank = Bank(self.clerk)
class BankTest(unittest.TestCase):
def setUp(self):
"""
our test bank has two accounts: wanda and rufus.
"""
self.clerk = MockClerk(schema)
self.clerk.store(Account(username="******"))
self.clerk.store(Account(username="******"))
self.bank = Bank(self.clerk)
def test_zerosum(self):
"""
LETS currency is a zero sum game.
Every credit holding account is offset
by another account holding debt.
"""
zeroSum = lambda: 0 == sum([self.bank.balanceFor(a.username) for a in self.clerk.match(Account)])
assert zeroSum()
self.bank.transfer("rufus", "wanda", 5, "test")
self.assertEquals(self.bank.balanceFor("rufus"), -5)
self.assertEquals(self.bank.balanceFor("wanda"), 5)
assert zeroSum()
def test_positive(self):
"""
you can't give someone a debt, or a 'nothing'
"""
self.assertRaises(ValueError, self.bank.transfer, "wanda", "rufus", -1, "whatever")
self.assertRaises(ValueError, self.bank.transfer, "wanda", "rufus", 0, "whatever")
def test_transfer_to_self(self):
self.assertRaises(ValueError, self.bank.transfer, "wanda", "wanda", 1, "self transfer")
def test_history(self):
assert len(self.clerk.match(Transaction)) == 0
self.bank.transfer("wanda", "rufus", 1, "history test")
assert len(self.clerk.match(Transaction)) == 1
t = self.clerk.fetch(Transaction, 1)
assert t.src.username == "wanda"
assert t.dst.username == "rufus"
assert t.amount == 1
assert self.bank.balanceFor("wanda") == -1
assert len(self.bank.historyFor("wanda")) == 1
