[ADD] web_favicon: test case for _get_favicon handling multiple compa…

…nies in cids cookie

web_favicon/tests/test_web_favicon.py

@@ -72,3 +72,21 @@ def test_03_website_favicon(self):
                 expected_favicon_url,
                 "The favicon URL should match the expected value.",
             )
+
+    def test_04_favicon_multiple_companies(self):
+        """Test _get_favicon with multiple companies in cids cookie."""
+        Company = self.env["res.company"]
+
+        company_1 = Company.create({"name": "Company 1", "favicon": Company._get_default_favicon()})
+        company_2 = Company.create({"name": "Company 2", "favicon": Company._get_default_favicon()})
+
+        with MockRequest(self.env) as mock_request:
+            mock_request.httprequest.cookies = {"cids": f"{company_1.id}-{company_2.id}"}
+            favicon_url = Company._get_favicon()
+
+        self.assertTrue(favicon_url, "Favicon URL should be generated for multiple companies.")
+        self.assertIn(
+            str(company_1.id),
+            favicon_url,
+            "Favicon URL should correspond to the first company in the cids cookie.",
+        )