test_csv.py 文件源码

def test_write(self):
            delta = 0
            rows = [[1,2,3]]*5
            s = NUL()
            lastrc = sys.gettotalrefcount()
            for i in range(20):
                gc.collect()
                self.assertEqual(gc.garbage, [])
                rc = sys.gettotalrefcount()
                writer = csv.writer(s)
                for row in rows:
                    writer.writerow(row)
                delta = rc-lastrc
                lastrc = rc
            # if writer leaks during write, last delta should be 5 or more
            self.assertEqual(delta < 5, True)