Add test for urlparse exception in is_valid_client_metadata_url

Add test case with malformed IPv6 URL to cover the exception branch,
removing the pragma: no cover comment.

Author: pcarleton

src/mcp/client/auth/utils.py

@@ -259,7 +259,7 @@ def is_valid_client_metadata_url(url: str | None) -> bool:
     try:
         parsed = urlparse(url)
         return parsed.scheme == "https" and parsed.path not in ("", "/")
-    except Exception:  # pragma: no cover
+    except Exception:
         return False
 
 

tests/client/test_auth.py

@@ -1851,6 +1851,8 @@ class TestCIMD:
             # Invalid URLs - None or empty
             (None, False),
             ("", False),
+            # Invalid URLs - malformed (triggers urlparse exception)
+            ("https://[invalid-ipv6]:8080/path", False),
         ],
     )
     def test_is_valid_client_metadata_url(self, url: str | None, expected: bool):