Method test_get_stats

Lib/test/test_external_inspection.py:3521–3551

Test that get_stats() returns statistics when stats=True.

(self)

        "Test only runs on Linux with process_vm_readv support",
    )
    def test_get_stats(self):
        """Test that get_stats() returns statistics when stats=True."""
        script_body = """\
            sock.sendall(b"ready")
            sock.recv(16)
            """

        with self._target_process(script_body) as (p, client_socket, _):
            unwinder = RemoteUnwinder(p.pid, all_threads=True, stats=True)
            _wait_for_signal(client_socket, b"ready")

            # Take a sample
            _get_stack_trace_with_retry(unwinder)

            stats = unwinder.get_stats()
            client_socket.sendall(b"done")

        # Verify expected keys exist
        expected_keys = [
            "total_samples",
            "frame_cache_hits",
            "frame_cache_misses",
            "frame_cache_partial_hits",
            "frames_read_from_cache",
            "frames_read_from_memory",
            "frame_cache_hit_rate",
        ]
        for key in expected_keys:
            self.assertIn(key, stats)

        self.assertEqual(stats["total_samples"], 1)

    @skip_if_not_supported
    @unittest.skipIf(