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Issue #16351: New function gc.get_stats() returns per-generation collection statistics.

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This commit is contained in:
Antoine Pitrou 2012-10-30 22:43:19 +01:00
parent d2217a83d4
commit d4156c1693
4 changed files with 111 additions and 0 deletions
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26
Lib/test/test_gc.py
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@ -610,6 +610,32 @@ class GCTests(unittest.TestCase):
stderr = run_command(code % "gc.DEBUG_SAVEALL")
self.assertNotIn(b"uncollectable objects at shutdown", stderr)
def test_get_stats(self):
stats = gc.get_stats()
self.assertEqual(len(stats), 3)
for st in stats:
self.assertIsInstance(st, dict)
self.assertEqual(set(st),
{"collected", "collections", "uncollectable"})
self.assertGreaterEqual(st["collected"], 0)
self.assertGreaterEqual(st["collections"], 0)
self.assertGreaterEqual(st["uncollectable"], 0)
# Check that collection counts are incremented correctly
if gc.isenabled():
self.addCleanup(gc.enable)
gc.disable()
old = gc.get_stats()
gc.collect(0)
new = gc.get_stats()
self.assertEqual(new[0]["collections"], old[0]["collections"] + 1)
self.assertEqual(new[1]["collections"], old[1]["collections"])
self.assertEqual(new[2]["collections"], old[2]["collections"])
gc.collect(2)
new = gc.get_stats()
self.assertEqual(new[0]["collections"], old[0]["collections"] + 1)
self.assertEqual(new[1]["collections"], old[1]["collections"])
self.assertEqual(new[2]["collections"], old[2]["collections"] + 1)
class GCCallbackTests(unittest.TestCase):
def setUp(self):