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"""Test module for detecting uncollectable garbage in PyTables.
This test module *must* be loaded in the last place. It just checks for
the existence of uncollectable garbage in ``gc.garbage`` after running
all the tests.
"""
import gc
from tables.tests import common
class GarbageTestCase(common.PyTablesTestCase):
"""Test for uncollectable garbage."""
def test00(self):
"""Checking for uncollectable garbage."""
garbageLen = len(gc.garbage)
if garbageLen == 0:
return # success
if common.verbose:
classCount = {}
# Count uncollected objects for each class.
for obj in gc.garbage:
objClass = obj.__class__.__name__
if objClass in classCount:
classCount[objClass] += 1
else:
classCount[objClass] = 1
incidence = [
"``%s``: %d" % (cls, cnt) for (cls, cnt) in classCount.items()
]
print("Class incidence:", ", ".join(incidence))
self.fail("Possible leak: %d uncollected objects." % garbageLen)
def suite():
"""Return a test suite consisting of all the test cases in the module."""
theSuite = common.unittest.TestSuite()
theSuite.addTest(common.make_suite(GarbageTestCase))
return theSuite
if __name__ == "__main__":
import sys
common.parse_argv(sys.argv)
common.print_versions()
common.unittest.main(defaultTest="suite")
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