def test_banks_assets(self):
simulator.do_economy_parameters(self.simInfo, self.pList, self.parameterDefs)
simulator.do_bank_parameters(self.simInfo, self.pList, self.parameterDefs)
eq_(len(self.simInfo.bankDirectory), 3, "Expected 3 banks but got %r" % len(self.simInfo.bankDirectory))
b1 = self.simInfo.bankDirectory["bank1"]
b2 = self.simInfo.bankDirectory["bank2"]
e1 = self.simInfo.economyDirectory["econ1"]
e2 = self.simInfo.economyDirectory["econ2"]
eq_(b1.economy, e1, "expected bank1's economy to be econ1 but is %r" % b1.economy)
eq_(b2.economy, e2, "expected bank2's economy to be econ2 but is %r" % b2.economy)
assert simulator.check_bank_nodes(self.simInfo)
simulator.reset_economies(self.simInfo)
simulator.reset_banks(self.simInfo)
# expect the following bank loans to be in place:
# bank1 -> bank2, mean size 10
# bank2 -> bank1, mean size 20
# bank2 -> bank3, mean size 20
# bank3 -> bank1, mean size 30
b3 = self.simInfo.bankDirectory["bank3"]
for bFrom, bTo, bl in zip([b1, b2, b2, b3], [b2, b1, b3, b1], [10, 20, 20, 30]):
lending = network.bank_lending(self.simInfo, bFrom, bTo)
assert abs(bl - lending) < 10, ("expected lending from %s to %s to be roughly %r but is %r" %
(bFrom.id_, bTo.id_, bl, lending))
borrowing = network.bank_borrowing(self.simInfo, bTo, bFrom)
assert abs(bl - borrowing) < 10, ("expected borrowing to %s from %s to be roughly %r but is %r" %
(bTo.id_, bFrom.id_, bl, borrowing))
for b, far, cr, capR in zip([b1, b2, b3], [0.30, 0.40, 0.25], [0.1, 0.15, 0.15], [0.15, .2, .125]):
assert approx_equal(b.total_assets(), b.total_liabilities() + b.equity_value(), .0000001), \
"Expected %s balance sheet to balance: assets %f, liabilities %f, capital %f" % (
b.id_, b.total_assets(), b.total_liabilities(), b.equity_value())
thisFar = b.financial_asset_ratio()
thisCr = b.cash / b.total_assets()
thisCapR = b.equity_value() / b.total_assets()
if b.deposits > 0: # there was no hanky panky
assert approx_equal(far, thisFar, .0000001), ("Expected %s financial asset ratio to be %f but is %f" %
(b.id_, far, thisFar))
assert approx_equal(cr, thisCr, .0000001), ("Expected %s cash ratio to be %f but is %f" % (b.id_, cr, thisCr))
assert approx_equal(capR, thisCapR, .0000001), ("Expected %s capital ratio to be %f but is %f" %
(b.id_, capR, thisCapR))
else:
assert thisFar < far, ("Expected %s financial asset ratio to be less than %f but is %f" % (b.id_, far, thisFar))
assert thisCr > cr, ("Expected %s cash ratio to be greater than %f but is %f" % (b.id_, cr, thisCr))
assert thisCapR < capR, ("Expected %s capital ratio to be less than %f but is %f" %
(b.id_, capR, thisCapR))
def test_banks_per_bank(self):
self.simInfo.theParameters.set('loanSizeType', 'perBank')
simulator.do_economy_parameters(self.simInfo, self.pList, self.parameterDefs)
simulator.do_bank_parameters(self.simInfo, self.pList, self.parameterDefs)
simulator.reset_economies(self.simInfo)
simulator.reset_banks(self.simInfo)
b1 = self.simInfo.bankDirectory["bank1"]
b2 = self.simInfo.bankDirectory["bank2"]
b3 = self.simInfo.bankDirectory["bank3"]
# expect the following bank loans to be in place:
# bank1 -> bank2, total size 10
# bank2 -> bank1, } total size 20
# bank2 -> bank3, }
# bank3 -> bank1, total size 30
for bFrom, bTo, bl in zip([b1, b2, b2, b3], [b2, b1, b3, b1], [10, 10, 10, 30]):
lending = network.bank_lending(self.simInfo, bFrom, bTo)
assert abs(bl - lending) < 10, ("expected lending from %s to %s to be roughly %r but is %r" %
(bFrom.id_, bTo.id_, bl, lending))
borrowing = network.bank_borrowing(self.simInfo, bTo, bFrom)
assert abs(bl - borrowing) < 10, ("expected borrowing to %s from %s to be roughly %r but is %r" %
(bTo.id_, bFrom.id_, bl, borrowing))
def test_banks_liabilities(self):
simulator.do_economy_parameters(self.simInfo, self.pList, self.parameterDefs)
simulator.do_bank_parameters(self.simInfo, self.pList, self.parameterDefs)
self.simInfo.theParameters.set('balanceSheetMethod', 'liabilities')
b1 = self.simInfo.bankDirectory["bank1"]
b2 = self.simInfo.bankDirectory["bank2"]
simulator.reset_economies(self.simInfo)
simulator.reset_banks(self.simInfo)
# expect the following bank loans to be in place:
# bank1 -> bank2, mean size 10
# bank2 -> bank1, mean size 20
# bank2 -> bank3, mean size 20
# bank3 -> bank1, mean size 30
b3 = self.simInfo.bankDirectory["bank3"]
for b, capR, flr, cr in zip([b1, b2, b3], [0.15, .2, .125], [0.7, 0.2, 0.7],
[0.1, 0.15, 0.15]):
assert approx_equal(b.total_assets(), b.total_liabilities() + b.equity_value(), .0000001), \
"Expected %s balance sheet to balance: assets %f, liabilities %f, capital %f" % (
b.id_, b.total_assets(), b.total_liabilities(), b.equity_value())
thisCapR = b.equity_value() / b.total_assets()
thisFlr = b.financial_liability_ratio()
thisCr = b.cash / b.total_assets()
thisInv = b.investment_value()
if thisInv > 0: # no hanky panky
assert approx_equal(capR, thisCapR, .0000001), ("Expected %s capital ratio to be %f but is %f" %
(b.id_, capR, thisCapR))
assert approx_equal(flr, thisFlr, .0000001), ("Expected %s financial liability ratio to be %f but is %f" %
(b.id_, flr, thisFlr))
assert approx_equal(cr, thisCr, .0000001), ("Expected %s cash ratio to be %f but is %f" % (b.id_, cr, thisCr))
else:
assert thisCapR < capR, ("Expected %s capital ratio to be less than %f but is %f" %
(b.id_, capR, thisCapR))
assert thisFlr < flr, ("Expected %s financial liability ratio to be less than %f but is %f" %
(b.id_, flr, thisFlr))
assert thisCr < cr, ("Expected %s cash ratio to be less than %f but is %f" % (b.id_, cr, thisCr))