def test_return_zero_without_customers(self):
queue = SupermarketQueue()
self.assertEquals(queue.process(), 0)
def test_it_returns_1_with_two_1min_customers_and_2_tills(self):
queue = SupermarketQueue([1, 1], 2)
self.assertEquals(queue.process(), 1)
def test_it_returns_12_with_many_customers_and_2tills(self):
queue = SupermarketQueue([2, 3, 10], 2)
self.assertEquals(queue.process(), 12)
def test_it_returns_2_with_one_2min_customer(self):
queue = SupermarketQueue([2], 1)
self.assertEquals(queue.process(), 2)
def test_it_returns_1_with_minimal_values(self):
queue = SupermarketQueue([1], 1)
self.assertEquals(queue.process(), 1)
def test_it_raises_invalid_customer_with_string_customer(self):
with self.assertRaises(InvalidCustomer):
SupermarketQueue(customers=['foo'])
def test_it_raises_invalid_customer_with_negativ_customer(self):
with self.assertRaises(InvalidCustomer):
SupermarketQueue(customers=[-1])
def test_it_raises_no_tills_exception_without_tills(self):
with self.assertRaises(NoTillsError):
SupermarketQueue(customers=[1], tills=0)