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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()), [2, 3, 4, 0, 5])
def test_same_key(self):
d = Container(5)
for i in xrange(10):
d['foo'] = i
self.assertEqual(list(d.keys()), ['foo'])
self.assertEqual(len(d), 1)
def test_access_ordering(self):
d = Container(5)
for i in xrange(10):
d[i] = True
# Keys should be ordered by access time
self.assertEqual(list(d.keys()), [5, 6, 7, 8, 9])
new_order = [7,8,6,9,5]
for k in new_order:
d[k]
self.assertEqual(list(d.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])
def test_disposal(self):
evicted_items = []
def dispose_func(arg):
# Save the evicted datum for inspection
evicted_items.append(arg)
d = Container(5, dispose_func=dispose_func)
for i in xrange(5):
d[i] = i
self.assertEqual(list(d.keys()), list(xrange(5)))
self.assertEqual(evicted_items, []) # Nothing disposed
d[5] = 5
self.assertEqual(list(d.keys()), list(xrange(1, 6)))
self.assertEqual(evicted_items, [0])
del d[1]
self.assertEqual(evicted_items, [0, 1])
d.clear()
self.assertEqual(evicted_items, [0, 1, 2, 3, 4, 5])
def test_iter(self):
d = Container()
with self.assertRaises(NotImplementedError):
for i in d:
self.fail("Iteration shouldn't be implemented.")
if __name__ == '__main__':
unittest.main()
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