ClickHouse/tests/integration/helpers/test_tools.py

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import difflib
import time
class TSV:
"""Helper to get pretty diffs between expected and actual tab-separated value files"""
def __init__(self, contents):
raw_lines = contents.readlines() if isinstance(contents, file) else contents.splitlines(True)
self.lines = [l.strip() for l in raw_lines if l.strip()]
def __eq__(self, other):
return self.lines == other.lines
def __ne__(self, other):
return self.lines != other.lines
def diff(self, other, n1=None, n2=None):
return list(line.rstrip() for line in difflib.unified_diff(self.lines, other.lines, fromfile=n1, tofile=n2))[2:]
def __str__(self):
return '\n'.join(self.lines)
@staticmethod
def toMat(contents):
return [line.split("\t") for line in contents.split("\n") if line.strip()]
def assert_eq_with_retry(instance, query, expectation, retry_count=20, sleep_time=0.5, stdin=None, timeout=None, settings=None, user=None, ignore_error=False):
expectation_tsv = TSV(expectation)
for i in xrange(retry_count):
try:
if TSV(instance.query(query, user=user, stdin=stdin, timeout=timeout, settings=settings, ignore_error=ignore_error)) == expectation_tsv:
break
time.sleep(sleep_time)
except Exception as ex:
print "assert_eq_with_retry retry {} exception {}".format(i + 1, ex)
time.sleep(sleep_time)
else:
val = TSV(instance.query(query, user=user, stdin=stdin, timeout=timeout, settings=settings, ignore_error=ignore_error))
if expectation_tsv != val:
raise AssertionError("'{}' != '{}'\n{}".format(expectation_tsv, val, '\n'.join(expectation_tsv.diff(val, n1="expectation", n2="query"))))