def test_cache_4 (self) :
c = Cache(10)
c.write(1, 100)
self.assertEqual(c.read(1), 100)
def test_cache_5 (self) :
c = Cache(10)
self.assertEqual(c.read(3), 0)
def test_cache_2 (self) :
c = Cache(10)
c.write(2, 10)
self.assertEqual(c.read(2), 10)
