refactor: modularize registration runtime safely

tests/test_browser_session.py

@@ -0,0 +1,36 @@
+import unittest
+from cpa_xai import browser_session
+
+
+class Bridge:
+    def __init__(self):
+        self.stops = 0
+    def stop(self):
+        self.stops += 1
+
+
+class Browser:
+    def __init__(self, bridge=None):
+        self._cpa_proxy_bridge = bridge
+        self.quits = 0
+    def quit(self):
+        self.quits += 1
+
+
+class BrowserSessionTests(unittest.TestCase):
+    def test_close_standalone_closes_browser_and_bridge(self):
+        bridge = Bridge()
+        browser = Browser(bridge)
+        browser_session._register_mint_browser(browser)
+        browser_session.close_standalone(browser)
+        self.assertEqual(browser.quits, 1)
+        self.assertEqual(bridge.stops, 1)
+
+    def test_normalize_cookies_rejects_invalid_items(self):
+        value = browser_session.normalize_cookies([None, {"name": "a", "value": "b"}, "bad"])
+        self.assertEqual(len(value), 1)
+        self.assertEqual(value[0]["name"], "a")
+
+
+if __name__ == "__main__":
+    unittest.main()