import gc
from unittest.mock import patch
from weakref import WeakSet

from odoo.tests import tagged
from .. import websocket as websocket_module
from .common import WebsocketCase


@tagged("-at_install", "post_install")
class TestCloseWebsocketAfterTour(WebsocketCase):
    @patch("odoo.tests.common.ChromeBrowser")
    def test_ensure_websocket_closed_after_tour(self, mocked_brower_class):
        """Sometimes, Chrome does not close the WebSocket connections properly after
        calling `HttpCase@_browser_js`. In such cases, the WebSocket connection
        remains open and can interfere with the test cursor, leading to
        concurrency errors. To resolve this issue, `HttpCase@_browser_js` ensures
        that the WebSocket connections are properly cleaned up. This test ensures
        that this behavior is reliable.
        """
        websocket_created = False

        def navigate_to_side_effect(*args, **kwargs):
            self.websocket_connect()
            self.assertEqual(len(websocket_module._websocket_instances), 1)
            nonlocal websocket_created
            websocket_created = True

        # Open a socket that won't be closed when calling browser.close()
        mocked_brower_class.return_value.navigate_to.side_effect = navigate_to_side_effect

        with patch.object(websocket_module, "_websocket_instances", WeakSet()):
            self.browser_js("/odoo", "")
            self.assertTrue(websocket_created)
            # serve_forever_patch prevent websocket instances from being collected. Stop it now.
            self._serve_forever_patch.stop()
            gc.collect()
            self.assertEqual(len(websocket_module._websocket_instances), 0)