fix(sp41): reset member_id on new CLP + tighten status-preservation test

backend/tests/test_rebill_parse_835_svc.py

@@ -1,19 +1,28 @@
 """835 SVC-level parser with member_id at SVC scope."""
 from pathlib import Path
+from collections import defaultdict
 from decimal import Decimal
 from cyclone.rebill.parse_835_svc import parse_835_svc
 
 FIX = Path(__file__).parent / "fixtures" / "835_sample_svc_with_member.txt"
 
 def test_parse_835_svc_extracts_member_id():
-    """NM1*QC NM109 at the CLP scope must propagate to every SVC row."""
+    """NM1*QC NM109 at the CLP scope must propagate to that CLP's SVC rows;
+    the multi-claim fixture confirms each CLP's NM1*QC lands on its own SVCs."""
     rows = list(parse_835_svc(FIX))
     assert len(rows) >= 1
+    by_claim: dict[str, list[str]] = defaultdict(list)
     for r in rows:
-        assert r.member_id == "J813715"
+        by_claim[r.claim_id].append(r.member_id)
         assert r.procedure  # non-empty
         assert r.svc_date   # non-empty
         assert r.charge > 0
+    # First CLP (T1001) -> original fixture member
+    assert all(mid == "J813715" for mid in by_claim["T1001"]), by_claim
+    # Second CLP (T1002, status 4) -> its own NM1*QC
+    assert all(mid == "OTHER-MEMBER-A" for mid in by_claim["T1002"]), by_claim
+    # Third CLP (T1003, status 22) -> its own NM1*QC
+    assert all(mid == "OTHER-MEMBER-B" for mid in by_claim["T1003"]), by_claim
 
 def test_parse_835_svc_extracts_cas_reasons():
     """CAS segments after DTM*472 must be captured (post-DTM*472 ordering)."""
@@ -22,7 +31,8 @@ def test_parse_835_svc_extracts_cas_reasons():
     assert any("OA-18" in r.cas_reasons for r in rows)
 
 def test_parse_835_svc_picks_up_status_22_reversals():
-    """Status 22 (reversal of previous payment) must be preserved."""
+    """Status 22 (reversal of previous payment) must be preserved, along with
+    status 1 (primary) and status 4 (denied)."""
     rows = list(parse_835_svc(FIX))
     statuses = {r.status for r in rows}
-    assert statuses & {"1", "4", "22"}  # at least one of each present
+    assert statuses == {"1", "4", "22"}