test: add regression test for to_json with JSON string parameter

Author: adsharma

test/test_json.py

@@ -0,0 +1,66 @@
+from __future__ import annotations
+
+import json
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from type_aliases import ConnDB
+
+
+def test_to_json_string_param_roundtrip(conn_db_empty: ConnDB) -> None:
+    """to_json() with a JSON string parameter should store the parsed object, not a string literal."""
+    conn, _ = conn_db_empty
+    conn.execute(
+        """
+        INSTALL json;
+        LOAD json;
+        CREATE NODE TABLE User (id SERIAL PRIMARY KEY, meta JSON);
+        """
+    )
+
+    data = {
+        "id": "http://localhost:8000/actors/testuser",
+        "ap_data": {
+            "id": "http://localhost:8000/actors/testuser",
+            "type": "Person",
+            "name": "",
+            "summary": "",
+            "username": "testuser",
+            "inbox": "http://localhost:8000/actors/testuser/inbox",
+            "outbox": "http://localhost:8000/actors/testuser/outbox",
+            "public_key": {
+                "id": "http://localhost:8000/actors/testuser#main-key",
+                "owner": "http://localhost:8000/actors/testuser",
+                "public_key_pem": (
+                    "-----BEGIN PUBLIC KEY-----\n"
+                    "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAni2p5Ni2mVmHKFlOFA5w\n"
+                    "zBLTZS3cEdiQ/IBqeSKYcKU4TFEhaFaVy3Be4pL+vFwX+iEXpvAznEhaC6oTU2zC\n"
+                    "EaXFhmVInsZ3kzrz2vTeXsOIwJ4auR8fFziwewXYXUgT0/KmSlNaYMz1PbXxPS+P\n"
+                    "DHL7E6ovJSau8Hj7UMDpF6W0Xty8PoU/Kw9Fyt3SXBHz6h5hvNXTiqS2HxWDbtz/\n"
+                    "j5tZlpvxiZ/sFN2w/bsotlbe2QOF5HuLA/w7B3E1Tan8jLNO4qXEHffdUZEl92ad\n"
+                    "dqnhsH9MJbRp6YfNnRMd1NaHu+rDUjTur34r5oVEz766oU/ZnGlGpJsvaQmUiMW8\n"
+                    "XQIDAQAB\n"
+                    "-----END PUBLIC KEY-----\n"
+                ),
+            },
+            "manually_approve_followers": False,
+            "@context": [
+                "https://www.w3.org/ns/activitystreams",
+                "https://w3id.org/security/v1",
+                {"manuallyApprovesFollowers": "as:manuallyApprovesFollowers"},
+            ],
+        },
+        "is_local": True,
+        "created_at": "2026-02-25T00:54:29.987623Z",
+    }
+
+    response = conn.execute(
+        """
+        CREATE (n:User {meta: to_json($meta)})
+        RETURN n.id as id, cast(n.meta AS STRING) as meta;
+        """,
+        parameters={"meta": json.dumps(data)},
+    )
+
+    response_data = json.loads(response.rows_as_dict().get_all()[0]["meta"])
+    assert response_data == data