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40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
from darc.lrucache import LRUCache
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from darc.testsuite import DarcTestCase
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class LRUCacheTestCase(DarcTestCase):
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def test(self):
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c = LRUCache(2)
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self.assert_equal(len(c), 0)
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for i, x in enumerate('abc'):
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c[x] = i
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self.assert_equal(len(c), 2)
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self.assert_equal(set(c), set(['b', 'c']))
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self.assert_equal(set(c.items()), set([('b', 1), ('c', 2)]))
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self.assert_equal(False, 'a' in c)
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self.assert_equal(True, 'b' in c)
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self.assert_raises(KeyError, lambda: c['a'])
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self.assert_equal(c['b'], 1)
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self.assert_equal(c['c'], 2)
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c['d'] = 3
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self.assert_equal(len(c), 2)
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self.assert_equal(c['c'], 2)
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self.assert_equal(c['d'], 3)
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c['c'] = 22
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c['e'] = 4
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self.assert_equal(len(c), 2)
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self.assert_raises(KeyError, lambda: c['d'])
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self.assert_equal(c['c'], 22)
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self.assert_equal(c['e'], 4)
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del c['c']
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self.assert_equal(len(c), 1)
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self.assert_raises(KeyError, lambda: c['c'])
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self.assert_equal(c['e'], 4)
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def test_pop(self):
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c = LRUCache(2)
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c[1] = 1
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c[2] = 2
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c.pop(1)
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c[3] = 3
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