feat(saju-lab): core.py — 60갑자 + 십성 + 십이운성 + calculate_saju (30/30 reference pass)

saju-lab/tests/test_core.py

@@ -0,0 +1,78 @@
+"""calculator/core.py — saju-web TS 엔진과 1:1 매칭 검증.
+
+fixtures/reference_saju.json 의 30 case (TS calculateSaju 결과)와 Python 구현 일치 여부 검증.
+"""
+import json
+from pathlib import Path
+
+import pytest
+
+from app.calculator.core import calculate_saju
+
+
+REF_PATH = Path(__file__).parent / "fixtures" / "reference_saju.json"
+REF = json.loads(REF_PATH.read_text(encoding="utf-8"))
+
+
+def _camel_to_snake(name: str) -> str:
+    out = []
+    for ch in name:
+        if ch.isupper():
+            out.append("_" + ch.lower())
+        else:
+            out.append(ch)
+    return "".join(out)
+
+
+def _normalize(d):
+    """TS camelCase → Python snake_case 변환 (deep)."""
+    if isinstance(d, dict):
+        return {_camel_to_snake(k): _normalize(v) for k, v in d.items()}
+    if isinstance(d, list):
+        return [_normalize(x) for x in d]
+    return d
+
+
+@pytest.mark.parametrize(
+    "case",
+    REF,
+    ids=lambda c: f"{c['input']['year']}-{c['input']['month']:02d}-{c['input']['day']:02d}-{c['input'].get('hour')}-{c['input']['gender']}",
+)
+def test_calculate_saju_matches_reference(case):
+    inp = case["input"]
+    expected = _normalize(case["expected"]["saju"])
+
+    actual = calculate_saju(
+        inp["year"], inp["month"], inp["day"],
+        inp.get("hour"), inp["gender"],
+    )
+
+    # 4기둥 비교
+    for pillar in ["year", "month", "day", "hour"]:
+        if expected.get(pillar) is None:
+            assert actual.get(pillar) is None, f"{pillar} should be None"
+            continue
+        if pillar == "hour" and inp.get("hour") is None:
+            assert actual.get(pillar) is None
+            continue
+        ep = expected[pillar]
+        ap = actual[pillar]
+        for field in ["stem", "branch", "stem_kr", "branch_kr", "element", "ten_god", "fortune"]:
+            assert ap[field] == ep[field], (
+                f"{pillar}.{field}: actual={ap[field]} expected={ep[field]} "
+                f"(input={inp})"
+            )
+
+    # day_stem
+    assert actual["day_stem"] == expected["day_stem"]
+
+    # gender
+    assert actual["gender"] == expected["gender"]
+
+    # birth_date
+    bd = actual["birth_date"]
+    assert bd["year"] == inp["year"]
+    assert bd["month"] == inp["month"]
+    assert bd["day"] == inp["day"]
+    if inp.get("hour") is not None:
+        assert bd.get("hour") == inp["hour"]