better error msg

smacke · smacke · commit b48d296f93d1 · 2025-01-11T22:57:31.000-08:00
diff --git a/IPython/utils/tests/test_tokenutil.py b/IPython/utils/tests/test_tokenutil.py
@@ -15,7 +15,11 @@ def expect_token(expected: str, cell: str, cursor_pos: int | None = None) -> Non
     Assert that the token at the cursor position is `expected`.
     """
     if cursor_pos is None:
-        assert cell.count("|") == 1, "Cursor position not specified and no | found"
+        assert (
+            cursor_count := cell.count("|")
+        ) == 1, (
+            f"Cursor position not specified and found {cursor_count} instance(s) of '|'"
+        )
         cursor_pos = cell.index("|")
         cell = cell.replace("|", "")
     token = token_at_cursor(cell, cursor_pos)
