def test_sweep_and_clean_cache_schedules_again(self):
"""
Sweep and clean should schedule a new sweep and clean in
clean_interval seconds.
"""
event_loop = mock.MagicMock()
connector = HttpConnector(event_loop)
event_loop.call_later = mock.MagicMock()
connector._sweep_and_clean_cache(event_loop, 300)
sweep = connector._sweep_and_clean_cache
event_loop.call_later.assert_called_once_with(300, sweep, event_loop,
300)
def test_sweep_and_clean_cache_stale_items_only(self):
"""
If the lookup cache is only full of stale items then the cache should
be emtied.
"""
event_loop = mock.MagicMock()
connector = HttpConnector(event_loop)
event_loop.call_later = mock.MagicMock()
now = time.time()
for i in range(10):
connector.lookups[str(i)] = {
'last_access': now - 500,
'lookup': mock.MagicMock()
}
connector._sweep_and_clean_cache(event_loop, 300)
self.assertEqual(len(connector.lookups), 0)
def test_sweep_and_clean_cache_fresh_items_only(self):
"""
If the lookup cache is only full of fresh items then the cache remains
the same (nothing to delete).
"""
event_loop = mock.MagicMock()
connector = HttpConnector(event_loop)
event_loop.call_later = mock.MagicMock()
now = time.time()
for i in range(10):
connector.lookups[str(i)] = {
'last_access': now,
'lookup': mock.MagicMock()
}
connector._sweep_and_clean_cache(event_loop, 300)
self.assertEqual(len(connector.lookups), 10)
def test_sweep_and_clean_cache_mixed_fresh_and_stale_items(self):
"""
Only the stale items should be removed from the cache.
"""
event_loop = mock.MagicMock()
connector = HttpConnector(event_loop)
event_loop.call_later = mock.MagicMock()
now = time.time()
for i in range(10):
if i % 2:
access = now - 500
else:
access = now
connector.lookups[str(i)] = {
'last_access': access,
'lookup': mock.MagicMock()
}
connector._sweep_and_clean_cache(event_loop, 300)
self.assertEqual(len(connector.lookups), 5)
