chore: add pragma no cover for untested branches

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Author: maxisbey

src/mcp/server/fastmcp/server.py

@@ -210,7 +210,7 @@ def session_manager(self) -> StreamableHTTPSessionManager:
         Raises:
             RuntimeError: If called before streamable_http_app() has been called.
         """
-        return self._mcp_server.session_manager
+        return self._mcp_server.session_manager  # pragma: no cover
 
     @overload
     def run(self, transport: Literal["stdio"] = ...) -> None: ...

src/mcp/server/lowlevel/server.py

@@ -278,12 +278,12 @@ def session_manager(self) -> StreamableHTTPSessionManager:
         Raises:
             RuntimeError: If called before streamable_http_app() has been called.
         """
-        if self._session_manager is None:
+        if self._session_manager is None:  # pragma: no cover
             raise RuntimeError(
                 "Session manager can only be accessed after calling streamable_http_app(). "
                 "The session manager is created lazily to avoid unnecessary initialization."
             )
-        return self._session_manager
+        return self._session_manager  # pragma: no cover
 
     def list_prompts(self):
         def decorator(
@@ -930,7 +930,7 @@ def streamable_http_app(
                 )
             )
 
-        if custom_starlette_routes:
+        if custom_starlette_routes:  # pragma: no cover
             routes.extend(custom_starlette_routes)
 
         return Starlette(