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import unittest
from urllib3._collections import RecentlyUsedContainer as Container
from urllib3.packages import six
xrange = six.moves.xrange
class TestLRUContainer(unittest.TestCase):
def test_maxsize(self):
d = Container(5)
for i in xrange(5):
d[i] = str(i)
self.assertEqual(len(d), 5)
for i in xrange(5):
self.assertEqual(d[i], str(i))
d[i+1] = str(i+1)
self.assertEqual(len(d), 5)
self.assertFalse(0 in d)
self.assertTrue(i+1 in d)
def test_expire(self):
d = Container(5)
for i in xrange(5):
d[i] = str(i)
for i in xrange(5):
d.get(0)
# Add one more entry
d[5] = '5'
# Check state
self.assertEqual(list(d.keys()), [0, 2, 3, 4, 5])
def test_pruning(self):
d = Container(5)
for i in xrange(5):
d[i] = str(i)
# Contend 2 entries for the most-used slot to balloon the heap
for i in xrange(100):
d.get(i % 2)
self.assertTrue(len(d.access_log) <= d.CLEANUP_FACTOR * d._maxsize)
def test_same_key(self):
d = Container(5)
for i in xrange(10):
d['foo'] = i
self.assertEqual(list(d.keys()), ['foo'])
d._prune_invalidated_entries()
self.assertEqual(len(d.access_log), 1)
def test_access_ordering(self):
d = Container(5)
for i in xrange(10):
d[i] = True
self.assertEqual(d._get_ordered_access_keys(), [9,8,7,6,5])
new_order = [7,8,6,9,5]
for k in reversed(new_order):
d[k]
self.assertEqual(d._get_ordered_access_keys(), new_order)
def test_delete(self):
d = Container(5)
for i in xrange(5):
d[i] = True
del d[0]
self.assertFalse(0 in d)
d.pop(1)
self.assertFalse(1 in d)
d.pop(1, None)
def test_get(self):
d = Container(5)
for i in xrange(5):
d[i] = True
r = d.get(4)
self.assertEqual(r, True)
r = d.get(5)
self.assertEqual(r, None)
r = d.get(5, 42)
self.assertEqual(r, 42)
self.assertRaises(KeyError, lambda: d[5])
if __name__ == '__main__':
unittest.main()
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