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import logging
import multiprocessing
import os
import time
from contextlib import contextmanager
log = logging.getLogger('integration_testing')
def verify_ordered_items_in_text(to_verify: list, text: str):
"""Assert all items in list appear in order in text.
Examples:
verify_ordered_items_in_text(['a', '1'], 'ab1') # passes
verify_ordered_items_in_text(['1', 'a'], 'ab1') # raises AssertionError
"""
index = 0
for item in to_verify:
index = text[index:].find(item)
assert index > -1, "Expected item not found: '{}'".format(item)
@contextmanager
def emit_dots_on_travis():
"""emit a dot every 60 seconds if running on Travis.
Travis will kill jobs that don't emit output for a certain amount of time.
This context manager spins up a background process which will emit a dot to
stdout every 60 seconds to avoid being killed.
It should be wrapped selectively around operations that are known to take a
long time.
"""
if os.environ.get('TRAVIS') != "true":
# If we aren't on Travis, don't do anything.
yield
return
def emit_dots():
while True:
log.info(".")
time.sleep(60)
dot_process = multiprocessing.Process(target=emit_dots)
dot_process.start()
try:
yield
finally:
dot_process.terminate()
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