fix(narayana): show the source-aware seed beside the historical sequence (BUG-1264, upstream 1918ffaf)

tests/test_narayana_method_comparison.py

@@ -0,0 +1,61 @@
+"""Narayana display keeps the historical sequence and names the selected seed (BUG-1264)."""
+
+from __future__ import annotations
+
+from scripts.narayana_dasha import (
+    calc_narayana_mahadasha,
+    narayana_dasha_full_report,
+    narayana_report_with_variants,
+)
+
+
+LONGS = {
+    "Sun": 10.0,
+    "Moon": 40.0,
+    "Mars": 70.0,
+    "Mercury": 100.0,
+    "Jupiter": 130.0,
+    "Venus": 160.0,
+    "Saturn": 15.0,
+    "Rahu": 250.0,
+    "Ketu": 70.0,
+}
+
+
+def test_default_calc_matches_the_explicit_legacy_profiles() -> None:
+    plain = calc_narayana_mahadasha(0, LONGS)
+    explicit = calc_narayana_mahadasha(
+        0,
+        LONGS,
+        0.0,
+        duration_profile="legacy_forward_v0",
+        sequence_profile="legacy_zodiacal_v0",
+        seed_profile="legacy_lagna_v0",
+        dual_lord_profile="legacy_primary_lord_v0",
+    )
+    assert plain == explicit
+    report = narayana_dasha_full_report(0, LONGS, current_age=30, birth_year=1990)
+    assert [row["sign"] for row in report["mahadasha_sequence"]] == [row["sign"] for row in plain]
+    assert report["interpretation"][1].startswith("起运星座: Aries（所选起运规则 legacy_lagna_v0）")
+    assert "（Lagna）" not in report["interpretation"][1]
+
+
+def test_source_aware_comparison_does_not_replace_the_historical_sequence() -> None:
+    compared = narayana_report_with_variants(0, LONGS, current_age=30, birth_year=1990)
+    historical = narayana_dasha_full_report(0, LONGS, current_age=30, birth_year=1990)
+    assert [row["years"] for row in compared["mahadasha_sequence"]] == [row["years"] for row in historical["mahadasha_sequence"]]
+    source = compared["method_comparison"]["source_aware"]
+    assert source["seed_selection"]["profile"] == "jaimini_lagna_seventh_strength_v1"
+    assert "jaimini_lagna_seventh_strength_v1" in source["interpretation"][1]
+    assert compared["comparison_required"] is True
+
+
+def test_ketu_in_the_seed_is_blocked_without_table_12() -> None:
+    longs = dict(LONGS)
+    longs["Saturn"] = 200.0
+    longs["Ketu"] = 5.0
+    compared = narayana_report_with_variants(0, longs, current_age=10, birth_year=1990)
+    source = compared["method_comparison"]["source_aware"]
+    assert source["status"] == "blocked"
+    assert "rath_ketu_table12_v1" in source["reason"]
+    assert compared["mahadasha_sequence"][0]["sign"] == "Aries"