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"""
Barebones regression-catching script that looks for ephemeral run() failures.
Intended to be run from top level of project via ``inv regression``. In an
ideal world this would be truly part of the integration test suite, but:
- something about the outer invoke or pytest environment seems to prevent such
issues from appearing reliably (see eg issue #660)
- it can take quite a while to run, even compared to other integration tests.
"""
import sys
from invoke import task
@task
def check(c):
count = 0
failures = []
for _ in range(0, 1000):
count += 1
try:
# 'ls' chosen as an arbitrary, fast-enough-for-looping but
# does-some-real-work example (where eg 'sleep' is less useful)
response = c.run("ls", hide=True)
if not response.ok:
failures.append(response)
except Exception as e:
failures.append(e)
if failures:
print("run() FAILED {}/{} times!".format(len(failures), count))
sys.exit(1)
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