51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
from pyqtgraph.util.lru_cache import LRUCache
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def testLRU():
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lru = LRUCache(2, 1)
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# check twice
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checkLru(lru)
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checkLru(lru)
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def checkLru(lru):
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lru[1] = 1
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lru[2] = 2
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lru[3] = 3
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assert len(lru) == 2
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assert set([2, 3]) == set(lru.keys())
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assert set([2, 3]) == set(lru.values())
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lru[2] = 2
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assert set([2, 3]) == set(lru.values())
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lru[1] = 1
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set([2, 1]) == set(lru.values())
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#Iterates from the used in the last access to others based on access time.
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assert [(2, 2), (1, 1)] == list(lru.iteritems(accessTime=True))
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lru[2] = 2
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assert [(1, 1), (2, 2)] == list(lru.iteritems(accessTime=True))
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del lru[2]
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assert [(1, 1), ] == list(lru.iteritems(accessTime=True))
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lru[2] = 2
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assert [(1, 1), (2, 2)] == list(lru.iteritems(accessTime=True))
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_a = lru[1]
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assert [(2, 2), (1, 1)] == list(lru.iteritems(accessTime=True))
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_a = lru[2]
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assert [(1, 1), (2, 2)] == list(lru.iteritems(accessTime=True))
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assert lru.get(2) == 2
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assert lru.get(3) == None
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assert [(1, 1), (2, 2)] == list(lru.iteritems(accessTime=True))
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lru.clear()
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assert [] == list(lru.iteritems())
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if __name__ == '__main__':
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testLRU()
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