mirror of
https://github.com/wassname/catalyst.git
synced 2026-06-28 19:47:13 +08:00
Scott Sanderson
132 lines
3.0 KiB
Python
132 lines
3.0 KiB
Python
from contextlib import contextmanager
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from logbook import FileHandler
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from zipline.finance.blotter import ORDER_STATUS
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from six import itervalues
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import pandas as pd
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def to_utc(time_str):
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return pd.Timestamp(time_str, tz='US/Eastern').tz_convert('UTC')
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def setup_logger(test, path='test.log'):
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test.log_handler = FileHandler(path)
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test.log_handler.push_application()
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def teardown_logger(test):
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test.log_handler.pop_application()
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test.log_handler.close()
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def drain_zipline(test, zipline):
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output = []
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transaction_count = 0
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msg_counter = 0
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# start the simulation
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for update in zipline:
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msg_counter += 1
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output.append(update)
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if 'daily_perf' in update:
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transaction_count += \
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len(update['daily_perf']['transactions'])
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return output, transaction_count
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def assert_single_position(test, zipline):
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output, transaction_count = drain_zipline(test, zipline)
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if 'expected_transactions' in test.zipline_test_config:
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test.assertEqual(
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test.zipline_test_config['expected_transactions'],
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transaction_count
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)
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else:
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test.assertEqual(
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test.zipline_test_config['order_count'],
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transaction_count
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)
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# the final message is the risk report, the second to
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# last is the final day's results. Positions is a list of
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# dicts.
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closing_positions = output[-2]['daily_perf']['positions']
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# confirm that all orders were filled.
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# iterate over the output updates, overwriting
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# orders when they are updated. Then check the status on all.
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orders_by_id = {}
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for update in output:
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if 'daily_perf' in update:
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if 'orders' in update['daily_perf']:
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for order in update['daily_perf']['orders']:
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orders_by_id[order['id']] = order
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for order in itervalues(orders_by_id):
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test.assertEqual(
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order['status'],
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ORDER_STATUS.FILLED,
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"")
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test.assertEqual(
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len(closing_positions),
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1,
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"Portfolio should have one position."
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)
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sid = test.zipline_test_config['sid']
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test.assertEqual(
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closing_positions[0]['sid'],
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sid,
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"Portfolio should have one position in " + str(sid)
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)
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return output, transaction_count
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class ExceptionSource(object):
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def __init__(self):
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pass
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def get_hash(self):
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return "ExceptionSource"
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def __iter__(self):
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return self
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def next(self):
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5 / 0
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def __next__(self):
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5 / 0
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class ExceptionTransform(object):
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def __init__(self):
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self.window_length = 1
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pass
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def get_hash(self):
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return "ExceptionTransform"
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def update(self, event):
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assert False, "An assertion message"
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@contextmanager
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def nullctx():
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"""
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Null context manager. Useful for conditionally adding a contextmanager in
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a single line, e.g.:
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with SomeContextManager() if some_expr else nullcontext:
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do_stuff()
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"""
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yield
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