fix(kis): collect all parent candidates before child evaluation; boundary case tests

Co-authored-by: genichin <4282227+genichin@users.noreply.github.com>

tests/adapters/broker/test_kis_cancel.py

@@ -7,7 +7,7 @@ pre-seeded, httpx.get faked) and assert the FillStatus mapping.
 
 from __future__ import annotations
 
-from datetime import datetime, timedelta, timezone
+from datetime import UTC, datetime, timedelta
 
 from trex_core.adapters.broker import kis as kis_mod
 from trex_core.adapters.broker.kis import KISBroker
@@ -23,7 +23,7 @@ def _broker():
         base_url="https://openapivts.koreainvestment.com:29443",  # mock endpoint
     )
     b._token = "tok"
-    b._token_exp = datetime.now(tz=timezone.utc) + timedelta(hours=1)
+    b._token_exp = datetime.now(tz=UTC) + timedelta(hours=1)
     return b
 
 
@@ -52,6 +52,7 @@ def _row(**kw):
         "rjct_qty": "0",
         "ord_dt": "20260608",
         "ord_gno_brno": "06010",
+        "pdno": "005930",
     }
     base.update(kw)
     return {"rt_cd": "0", "output1": [base]}
@@ -509,3 +510,140 @@ def test_correction_child_wrong_identity_is_not_treated_as_correction(monkeypatc
     assert fs.state == "accepted", f"expected accepted (unrelated correction), got {fs.state}"
     raw = fs.raw if isinstance(fs.raw, dict) else {}
     assert raw.get("reason") != "correction_child_present_unresolved"
+
+
+# ── Regression: parent identity boundary cases (missing / wrong-first / ambiguous) ─
+
+def test_parent_missing_identity_fields_returns_unknown(monkeypatch):
+    """Parent row with missing pdno and ord_dt → treated as identity mismatch (fail-closed)."""
+    parent_no_identity = {
+        "odno": ODNO,
+        "orgn_odno": "",
+        "ord_qty": "10",
+        "tot_ccld_qty": "0",
+        "avg_prvs": "0",
+        "cncl_yn": "Y",   # would be cancelled if accepted
+        "rjct_qty": "0",
+        # ord_dt, ord_gno_brno, pdno intentionally absent
+    }
+    monkeypatch.setattr(
+        kis_mod.httpx, "get", _fake_get({"rt_cd": "0", "output1": [parent_no_identity]})
+    )
+    fs = _broker().poll_fill(
+        f"06010:{ODNO}", side="buy", symbol="225190", order_date="20260901"
+    )
+    # Missing identity → fail-closed, not terminal
+    assert fs.state == "unknown", f"expected unknown (missing identity), got {fs.state}"
+    assert not fs.is_terminal_reject
+
+
+def test_child_cancel_missing_identity_fields_not_accepted_as_cancel(monkeypatch):
+    """Cancel child with missing identity fields must NOT be accepted as matching child."""
+    parent = {
+        "odno": ODNO,
+        "orgn_odno": "",
+        "ord_qty": "10",
+        "tot_ccld_qty": "0",
+        "avg_prvs": "0",
+        "cncl_yn": "",
+        "rjct_qty": "0",
+        "ord_dt": "20260901",
+        "ord_gno_brno": "06010",
+        "pdno": "225190",
+    }
+    child_no_identity = {
+        "odno": "0000123461",
+        "orgn_odno": ODNO,
+        "ord_qty": "10",
+        "tot_ccld_qty": "0",
+        "avg_prvs": "0",
+        "cncl_yn": "Y",
+        "rjct_qty": "0",
+        # ord_dt, ord_gno_brno, pdno intentionally absent
+    }
+    monkeypatch.setattr(
+        kis_mod.httpx,
+        "get",
+        _fake_get({"rt_cd": "0", "output1": [parent, child_no_identity]}),
+    )
+    fs = _broker().poll_fill(
+        f"06010:{ODNO}", side="buy", symbol="225190", order_date="20260901"
+    )
+    # Child has missing identity → not a matching cancel; parent has no fill → accepted
+    assert fs.state == "accepted", f"expected accepted (child missing identity), got {fs.state}"
+
+
+def test_wrong_parent_first_exact_parent_later_finds_cancel(monkeypatch):
+    """When the wrong-branch parent comes first, the exact parent+cancel child later must win."""
+    wrong_parent = {
+        "odno": ODNO,
+        "orgn_odno": "",
+        "ord_qty": "10",
+        "tot_ccld_qty": "0",
+        "avg_prvs": "0",
+        "cncl_yn": "",
+        "rjct_qty": "0",
+        "ord_dt": "20260901",
+        "ord_gno_brno": "99999",   # wrong branch — comes first in list
+        "pdno": "225190",
+    }
+    exact_parent = {
+        "odno": ODNO,
+        "orgn_odno": "",
+        "ord_qty": "10",
+        "tot_ccld_qty": "0",
+        "avg_prvs": "0",
+        "cncl_yn": "",
+        "rjct_qty": "0",
+        "ord_dt": "20260901",
+        "ord_gno_brno": "06010",   # correct branch — comes second
+        "pdno": "225190",
+    }
+    child = {
+        "odno": "0000123462",
+        "orgn_odno": ODNO,
+        "ord_qty": "10",
+        "tot_ccld_qty": "0",
+        "avg_prvs": "0",
+        "cncl_yn": "Y",
+        "rjct_qty": "0",
+        "ord_dt": "20260901",
+        "ord_gno_brno": "06010",
+        "pdno": "225190",
+    }
+    monkeypatch.setattr(
+        kis_mod.httpx,
+        "get",
+        _fake_get({"rt_cd": "0", "output1": [wrong_parent, exact_parent, child]}),
+    )
+    fs = _broker().poll_fill(
+        f"06010:{ODNO}", side="buy", symbol="225190", order_date="20260901"
+    )
+    # Must find the exact parent + cancel child even though wrong parent comes first
+    assert fs.state == "cancelled", f"expected cancelled (exact parent later), got {fs.state}"
+
+
+def test_ambiguous_exact_parents_returns_unknown(monkeypatch):
+    """Two rows with identical exact identity → ambiguous parent → unknown."""
+    parent1 = {
+        "odno": ODNO,
+        "orgn_odno": "",
+        "ord_qty": "10",
+        "tot_ccld_qty": "0",
+        "avg_prvs": "0",
+        "cncl_yn": "",
+        "rjct_qty": "0",
+        "ord_dt": "20260901",
+        "ord_gno_brno": "06010",
+        "pdno": "225190",
+    }
+    parent2 = {**parent1}  # exact duplicate
+    monkeypatch.setattr(
+        kis_mod.httpx, "get", _fake_get({"rt_cd": "0", "output1": [parent1, parent2]})
+    )
+    fs = _broker().poll_fill(
+        f"06010:{ODNO}", side="buy", symbol="225190", order_date="20260901"
+    )
+    assert fs.state == "unknown", f"expected unknown (ambiguous parents), got {fs.state}"
+    raw = fs.raw if isinstance(fs.raw, dict) else {}
+    assert raw.get("reason") == "parent_identity_ambiguous"