def test__add_order():
"""
This is a perfect case!
New order gets created successfully.
"""
processOrder(ob, '1568390243|abbb11|a|AAPL|B|209.00000|100')
assert getBestBidAndAsk(ob, 'AAPL') == '209.0/0.0'
def test__update_order():
processOrder(ob, '1568390243|abbb11|a|AAPL|B|209.00000|100')
# This covers changing ticker, side, price and quantity
processOrder(ob, '1568390247|abbb11|u|JPM|S|101.00000|1')
assert ob.orders['abbb11'].ticker == 'JPM'
assert ob.orders['abbb11'].side == 'S'
assert ob.orders['abbb11'].price == 101.0
assert ob.orders['abbb11'].quantity == 1
def test__cancel_order():
"""
This is a perfect case!
Order gets cancelled properly.
"""
processOrder(ob, '1568390243|abbb114|a|AAPL1|B|209.00000|100')
# Intentional incorrect cancel order as other colmns are ignores
processOrder(ob, '1568390245|abbb114|c|AAPL1|B|209.00000|100')
assert getBestBidAndAsk(ob, 'AAPL1') == '0.0/0.0'
def test_process_order_error():
"""
The perfect case is covered by other tests so covering incorrect action only.
"""
with pytest.raises(
ValueError,
match=
"Incorrect/invalid action with value K. a, u and c are the allowable actions."
):
processOrder(ob, '1568390243|abbb11|K')
def test__update_order_error():
"""
Updating an order that does not exist.
I choose to throw an error but the code can be changed to treat an update without an add as an add!
"""
with pytest.raises(
ValueError,
match=
"Incorrect/invalid orderId with value abbb. Unable to amend order as it does not exist."
):
processOrder(ob, '1568390247|abbb|u|100')
def test__cancel_order_error():
"""
Cancelling an order that does not exist.
I choose to throw an error but the code can be changed to ignore it too!
"""
with pytest.raises(
ValueError,
match=
"Incorrect/invalid orderId with value None. Unable to cancel order as it does not exist."
):
processOrder(ob, '1568390247|abbb112345|c|AAPL|B|209.00000|100')