feat: restore source parity and harden agent runtime

backend-fastapi/online_dev/report_manager/engine/test_polymerize.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+from online_dev.report_manager.engine.polymerize import build_bind_list
+
+
+def test_group_bind():
+    cell = {
+        "custom": {
+            "field": "category",
+            "polymerizationType": "2",
+            "groupType": "default",
+        }
+    }
+    rows = [
+        {"category": "A", "x": 1},
+        {"category": "B", "x": 2},
+        {"category": "A", "x": 3},
+    ]
+    binds = build_bind_list(cell, rows)
+    assert len(binds) == 2
+    assert binds[0].value == "A"
+    assert len(binds[0].data_list) == 2
+
+
+if __name__ == "__main__":
+    test_group_bind()
+    print("ok")