Commit b1344d30 authored by Tim Peters's avatar Tim Peters

testPathologicalRightBranching(), testPathologicalLeftBranching(): Note

that these tests can fail for bogus reasons.  Jeremy saw them failing
today, and it took a while to figure out that this had nothing to do with
the ZODB changes he was making.
parent 059252b2
......@@ -220,13 +220,23 @@ class TestTransientObjectContainer(TestBase):
def testPathologicalRightBranching(self):
r = range(10, 1010)
# NOTE: If the process running this test swaps out inside the loop,
# it can easily cause the test to fail, with a prefix of the expected
# keys missing (the keys added before the interruption expire by the
# time they're checked). This can happen with interruptions of less
# than 1 wall-clock second, so can and does happen.
for x in r:
self.t[x] = 1
assert list(self.t.keys()) == r, (self.t.keys(), r)
# NOTE: The next line may fail even if the line above succeeds: if
# the key age is such that keys *start* to expire right after
# list(self.t.keys()) completes, keys can vanish before __delitem__
# gets to them.
map(self.t.__delitem__, r)
assert list(self.t.keys()) == [], self.t.keys()
def testPathologicalLeftBranching(self):
# See notes for testPathologicalRightBranching.
r = range(10, 1010)
revr = r[:]
revr.reverse()
......
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