@implementation
    def test_feed_filter_copy(self):
        self.setup_filter()
        original_count = len(self.test_feed[:])
        offset = self.test_feed[3:][0].serialization_id
        self.test_feed.filter(activity_id__lte=offset)
        self.assertEquals(len(self.test_feed[:]), original_count)
If a system platform name is supplied to L{Platform}'s initializer, it
dataset/ETHPy150Open tschellenbach/Stream-Framework/stream_framework/tests/feeds/base.py/TestBaseFeed.test_feed_filter_copy--crossover with--dataset/ETHPy150Open twisted/twisted/twisted/python/test/test_runtime.py/ForeignPlatformTests.test_isMacOSX