Mercurial > hg
view contrib/bdiff-torture.py @ 34894:b63a7d839c33
tests: de-flake test-run-tests.t's "--jobs=2 --first" test
Once in a while, test-nothing.t finished before test-failure.t or
test-failure-copy.t (I haven't checked which one actually gets run
first). Since there already are two tests that will fail in the same
way, just run those two instead so the diff will be reproducible and
not timing-dependent.
The test case was added in 9a20f53e436f (run-tests: handle --jobs and
--first gracefully, 2014-10-09), and I have checked that backing that
out results in two failures being printed. Note that the summary may
still include multiple tests even if --first is given, it's just that
the diff is only printed for the first failure.
Differential Revision: https://phab.mercurial-scm.org/D1186
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Wed, 18 Oct 2017 16:28:18 -0700 |
parents | 0c73634d0570 |
children | 876494fd967d |
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# Randomized torture test generation for bdiff from __future__ import absolute_import, print_function import random import sys from mercurial import ( mdiff, ) def reducetest(a, b): tries = 0 reductions = 0 print("reducing...") while tries < 1000: a2 = "\n".join(l for l in a.splitlines() if random.randint(0, 100) > 0) + "\n" b2 = "\n".join(l for l in b.splitlines() if random.randint(0, 100) > 0) + "\n" if a2 == a and b2 == b: continue if a2 == b2: continue tries += 1 try: test1(a, b) except Exception as inst: reductions += 1 tries = 0 a = a2 b = b2 print("reduced:", reductions, len(a) + len(b), repr(a), repr(b)) try: test1(a, b) except Exception as inst: print("failed:", inst) sys.exit(0) def test1(a, b): d = mdiff.textdiff(a, b) if not d: raise ValueError("empty") c = mdiff.patches(a, [d]) if c != b: raise ValueError("bad") def testwrap(a, b): try: test1(a, b) return except Exception as inst: pass print("exception:", inst) reducetest(a, b) def test(a, b): testwrap(a, b) testwrap(b, a) def rndtest(size, noise): a = [] src = " aaaaaaaabbbbccd" for x in xrange(size): a.append(src[random.randint(0, len(src) - 1)]) while True: b = [c for c in a if random.randint(0, 99) > noise] b2 = [] for c in b: b2.append(c) while random.randint(0, 99) < noise: b2.append(src[random.randint(0, len(src) - 1)]) if b2 != a: break a = "\n".join(a) + "\n" b = "\n".join(b2) + "\n" test(a, b) maxvol = 10000 startsize = 2 while True: size = startsize count = 0 while size < maxvol: print(size) volume = 0 while volume < maxvol: rndtest(size, 2) volume += size count += 2 size *= 2 maxvol *= 4 startsize *= 4