def setUp(self): self.helper = BidderHelper() self.window_size = 5 self.commitment = 0.8 self.reputation = 0.5 self.long_success_list = [1,0,1,0,1,0,1] self.short_success_list = [1,0,1,0] self.cost = 0.5
class BidderHelperTests(unittest.TestCase):
def setUp(self):
self.helper = BidderHelper()
self.window_size = 5
self.commitment = 0.8
self.reputation = 0.5
self.long_success_list = [1,0,1,0,1,0,1]
self.short_success_list = [1,0,1,0]
self.cost = 0.5
def test_method_returns_myopic_method(self):
method = self.helper.method({'method': 'myopic'})
self.assertEqual(method.func, self.helper.myopic_bidding)
self.assertEqual(method.args, ())
def test_method_returns_lebodics_method(self):
method = self.helper.method({'method':'lebodic', 'window_size':self.window_size})
self.assertEqual(method.func, self.helper.lebodics_reputation_update)
self.assertEqual(method.args, (self.window_size,))
def test_method_returns_mcdiarmids_method(self):
method = self.helper.method({'method':'mcdiarmid', 'commitment':self.commitment})
self.assertEqual(method.func, self.helper.mcdiarmids_reputation_update)
self.assertEqual(method.args, (self.commitment,))
def test_method_raises_unknown_method_error(self):
with self.assertRaises(errors.UnknownMethodError):
self.helper.method({'method': 'unknown'})
with self.assertRaises(errors.UnknownMethodError):
self.helper.method({'something': None})
with self.assertRaises(errors.UnknownMethodError):
self.helper.method({'method': 'lebodic'})
def test_myopic_bidding_for_price_weight_0(self):
bid = self.helper.myopic_bidding(0.0, 0.5, 0.25, 0.5)
self.assertEqual(bid, float('inf'))
def test_myopic_bidding_for_price_weight_1(self):
bid = self.helper.myopic_bidding(1.0, self.cost, 0.25, 0.5)
self.assertEqual(bid, (1 + self.cost)/2)
def test_myopic_bidding_for_equal_reputations(self):
bid = self.helper.myopic_bidding(0.5, self.cost, self.reputation, self.reputation)
self.assertEqual(bid, (1 + self.cost)/2)
def test_myopic_bidding_for_remaining_cases(self):
price_weight = 0.5
bid = self.helper.myopic_bidding(price_weight, self.cost, self.reputation, 0.75)
def th_cost(bid):
if bid == 13/16:
return 0.75
else:
return 0.75 + 1 / ((13*8 - 128*bid) * (-(81*2)/63) * np.exp(-16/63 + 1/(13-16*bid)) + 4*(7*8 - 64*bid))
th_bids = np.linspace(145/(32*8), 13/16, 1000)
diff = list(map(lambda x: np.abs(x-0.5), map(th_cost, th_bids)))
th_bid = th_bids[diff.index(min(diff))]
self.assertEqual(bid, (th_bid - price_weight * self.cost)/price_weight)
def test_lebodics_reputation_update(self):
reputation = self.helper.lebodics_reputation_update(self.window_size,
self.reputation,
self.long_success_list)
self.assertEqual(reputation, 0.4)
reputation = self.helper.lebodics_reputation_update(self.window_size,
self.reputation,
self.short_success_list)
self.assertEqual(reputation, self.reputation)
def test_mcdiarmids_reputation_update(self):
reputation = self.helper.mcdiarmids_reputation_update(self.commitment,
self.reputation,
self.long_success_list)
self.assertEqual(reputation, self.reputation - 0.01)
reputation = self.helper.mcdiarmids_reputation_update(self.commitment,
self.reputation,
self.short_success_list)
self.assertEqual(reputation, self.reputation + self.commitment / 100 / (1-self.commitment))