test_linecache.py 文件源码

def test_memoryerror(self):
        lines = linecache.getlines(FILENAME)
        self.assertTrue(lines)
        def raise_memoryerror(*args, **kwargs):
            raise MemoryError
        with support.swap_attr(linecache, 'updatecache', raise_memoryerror):
            lines2 = linecache.getlines(FILENAME)
        self.assertEqual(lines2, lines)

        linecache.clearcache()
        with support.swap_attr(linecache, 'updatecache', raise_memoryerror):
            lines3 = linecache.getlines(FILENAME)
        self.assertEqual(lines3, [])
        self.assertEqual(linecache.getlines(FILENAME), lines)