def test_get_best_bid_price_with_no_ask():
book = OrderBook()
order_stream1 = '1568390201|abbb11|a|AAPL|S|209.00000|100'
order_stream2 = '1568390202|abbb13|a|AAPL|S|220.00000|1000'
book.process_order(order_stream1)
book.process_order(order_stream2)
assert book.best_bid_and_ask('AAPL') == (0, 220)
def test_get_bid_and_ask_for_missing_ticker():
book = OrderBook()
order_stream1 = '1568390201|abbb11|a|AAPL|S|209.00000|100'
order_stream2 = '1568390202|abbb13|a|AAPL|S|220.00000|1000'
book.process_order(order_stream1)
book.process_order(order_stream2)
assert book.best_bid_and_ask('ZZZZ') == (0, 0)
def test_get_best_bid_and_ask_prices():
book = OrderBook()
order_stream1 = '1568390201|abbb11|a|AAPL|B|209.00000|100'
order_stream2 = '1568390202|abbb12|a|AAPL|S|210.00000|10'
order_stream3 = '1568390202|abbb13|a|AAPL|B|220.00000|1000'
order_stream4 = '1568390202|abbb14|a|AAPL|S|230.00000|500'
book.process_order(order_stream1)
book.process_order(order_stream2)
book.process_order(order_stream3)
book.process_order(order_stream4)
assert book.best_bid_and_ask('AAPL') == (209, 230)