mirror of
https://github.com/facebook/sapling.git
synced 2024-10-08 07:49:11 +03:00
ffbcb6c497
Hypothesis a library for adding fuzzing over a range of structure data to your test suite: http://hypothesis.readthedocs.org/en/latest/ This adds the ability to build tests using Hypothesis within the Mercurial test suite. New tests and fixes using this helpers comes in later changesets.
63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# Helper module to use the Hypothesis tool in tests
|
|
#
|
|
# Copyright 2015 David R. MacIver
|
|
#
|
|
# For details see http://hypothesis.readthedocs.org
|
|
|
|
import os
|
|
import sys
|
|
import traceback
|
|
|
|
from hypothesis.settings import set_hypothesis_home_dir
|
|
import hypothesis.strategies as st
|
|
from hypothesis import given, Settings
|
|
|
|
# hypothesis store data regarding generate example and code
|
|
set_hypothesis_home_dir(os.path.join(
|
|
os.getenv('TESTTMP'), ".hypothesis"
|
|
))
|
|
|
|
def check(*args, **kwargs):
|
|
"""decorator to make a function a hypothesis test
|
|
|
|
Decorated function are run immediately (to be used doctest style)"""
|
|
def accept(f):
|
|
# Workaround for https://github.com/DRMacIver/hypothesis/issues/206
|
|
# Fixed in version 1.13 (released 2015 october 29th)
|
|
f.__module__ = '__anon__'
|
|
try:
|
|
given(*args, settings=Settings(max_examples=2000), **kwargs)(f)()
|
|
except Exception:
|
|
traceback.print_exc(file=sys.stdout)
|
|
sys.exit(1)
|
|
return accept
|
|
|
|
|
|
def roundtrips(data, decode, encode):
|
|
"""helper to tests function that must do proper encode/decode roundtripping
|
|
"""
|
|
@given(data)
|
|
def testroundtrips(value):
|
|
encoded = encode(value)
|
|
decoded = decode(encoded)
|
|
if decoded != value:
|
|
raise ValueError(
|
|
"Round trip failed: %s(%r) -> %s(%r) -> %r" % (
|
|
encode.__name__, value, decode.__name__, encoded,
|
|
decoded
|
|
))
|
|
try:
|
|
testroundtrips()
|
|
except Exception:
|
|
# heredoc swallow traceback, we work around it
|
|
traceback.print_exc(file=sys.stdout)
|
|
raise
|
|
print("Round trip OK")
|
|
|
|
|
|
# strategy for generating bytestring that might be an issue for Mercurial
|
|
bytestrings = (
|
|
st.builds(lambda s, e: s.encode(e), st.text(), st.sampled_from([
|
|
'utf-8', 'utf-16',
|
|
]))) | st.binary()
|