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Editing: test_lru.py

import unittest

from cachetools import LRUCache

from . import CacheTestMixin

class LRUCacheTest(unittest.TestCase, CacheTestMixin):
    Cache = LRUCache

def test_lru(self):
        cache = LRUCache(maxsize=2)

cache[1] = 1
        cache[2] = 2
        cache[3] = 3

self.assertEqual(len(cache), 2)
        self.assertEqual(cache[2], 2)
        self.assertEqual(cache[3], 3)
        self.assertNotIn(1, cache)

cache[2]
        cache[4] = 4
        self.assertEqual(len(cache), 2)
        self.assertEqual(cache[2], 2)
        self.assertEqual(cache[4], 4)
        self.assertNotIn(3, cache)

cache[5] = 5
        self.assertEqual(len(cache), 2)
        self.assertEqual(cache[4], 4)
        self.assertEqual(cache[5], 5)
        self.assertNotIn(2, cache)

def test_lru_getsizeof(self):
        cache = LRUCache(maxsize=3, getsizeof=lambda x: x)

cache[1] = 1
        cache[2] = 2

self.assertEqual(len(cache), 2)
        self.assertEqual(cache[1], 1)
        self.assertEqual(cache[2], 2)

cache[3] = 3

self.assertEqual(len(cache), 1)
        self.assertEqual(cache[3], 3)
        self.assertNotIn(1, cache)
        self.assertNotIn(2, cache)

with self.assertRaises(ValueError):
            cache[4] = 4
        self.assertEqual(len(cache), 1)
        self.assertEqual(cache[3], 3)

BATAL