fix(stock): Phase 2 결정엔진 견고화 (빈노드 제외·cur=0 손절·params기본값·NaN MA·테스트)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

stock/app/test_holdings_intel.py

@@ -141,3 +141,50 @@ def test_decide_action_matrix():
     # 이탈 없음 보통 강도 → hold
     a, _ = hi.decide_action(50, {}, 1)
     assert a == "hold"
+
+
+# ---- Phase 2 hardening tests (m3) ----
+
+def _ticker_prices_hl(closes, highs, vols):
+    n = len(closes)
+    base = dt.date(2025, 1, 1)
+    return pd.DataFrame({
+        "ticker": ["005930"] * n,
+        "date": [(base + dt.timedelta(days=i)).isoformat() for i in range(n)],
+        "open": closes,
+        "high": highs,
+        "low": closes,
+        "close": closes,
+        "volume": vols,
+    })
+
+
+def test_exit_rules_climax():
+    closes = [1000] * 30
+    highs = [1000] * 29 + [1100]  # 마지막날 상단꼬리(종가1000 < 고가1100*0.97)
+    vols = [1000] * 29 + [5000]   # 거래량 5x
+    flags = hi.exit_rules({"avg_price": 900, "current_price": 1000},
+                          _ticker_prices_hl(closes, highs, vols), {})
+    assert flags["climax"] is True
+
+
+def test_exit_rules_ma200_break():
+    closes = list(range(1000, 1000 + 260))[::-1]  # 하락 추세 → 종가 < MA200
+    df = _ticker_prices(closes)
+    flags = hi.exit_rules({"avg_price": 2000, "current_price": closes[-1]}, df, {})
+    assert flags["ma200_break"] is True
+
+
+def test_technical_posture_short_history_returns_low_not_crash():
+    ctx = _toy_ctx(("005930",), n=100)   # <252 → MA 노드 NaN→0, but no crash
+    scores = hi.technical_posture(ctx, ["005930"])
+    assert "005930" in scores
+    assert 0.0 <= scores["005930"] <= 100.0
+
+
+def test_technical_posture_empty_kospi_not_penalized():
+    # rs_rating는 빈 kospi에서 빈 Series → combine에서 제외되어야 (C1)
+    ctx = _toy_ctx(("005930",), n=300)   # kospi 빈 fixture
+    scores = hi.technical_posture(ctx, ["005930"])
+    # ma_alignment+momentum만으로 정규화 → 상승추세면 충분히 높은 점수
+    assert scores["005930"] > 50.0