Combat Backend & Data Models

- Implement Combat Service
- Implement Damage Calculator
- Implement Effect Processor
- Implement Combat Actions
- Created Combat API Endpoints

api/tests/test_stats.py

@@ -196,3 +196,55 @@ def test_stats_repr():
     assert "INT=10" in repr_str
     assert "HP=" in repr_str
     assert "MP=" in repr_str
+
+
+# =============================================================================
+# LUK Computed Properties (Combat System Integration)
+# =============================================================================
+
+def test_crit_bonus_calculation():
+    """Test crit bonus calculation: luck * 0.5%."""
+    stats = Stats(luck=8)
+    assert stats.crit_bonus == pytest.approx(0.04, abs=0.001)  # 4%
+
+    stats = Stats(luck=12)
+    assert stats.crit_bonus == pytest.approx(0.06, abs=0.001)  # 6%
+
+    stats = Stats(luck=0)
+    assert stats.crit_bonus == pytest.approx(0.0, abs=0.001)  # 0%
+
+
+def test_hit_bonus_calculation():
+    """Test hit bonus (miss reduction): luck * 0.5%."""
+    stats = Stats(luck=8)
+    assert stats.hit_bonus == pytest.approx(0.04, abs=0.001)  # 4%
+
+    stats = Stats(luck=12)
+    assert stats.hit_bonus == pytest.approx(0.06, abs=0.001)  # 6%
+
+    stats = Stats(luck=20)
+    assert stats.hit_bonus == pytest.approx(0.10, abs=0.001)  # 10%
+
+
+def test_lucky_roll_chance_calculation():
+    """Test lucky roll chance: 5% + (luck * 0.25%)."""
+    stats = Stats(luck=8)
+    # 5% + (8 * 0.25%) = 5% + 2% = 7%
+    assert stats.lucky_roll_chance == pytest.approx(0.07, abs=0.001)
+
+    stats = Stats(luck=12)
+    # 5% + (12 * 0.25%) = 5% + 3% = 8%
+    assert stats.lucky_roll_chance == pytest.approx(0.08, abs=0.001)
+
+    stats = Stats(luck=0)
+    # 5% + (0 * 0.25%) = 5%
+    assert stats.lucky_roll_chance == pytest.approx(0.05, abs=0.001)
+
+
+def test_repr_includes_combat_bonuses():
+    """Test that repr includes LUK-based combat bonuses."""
+    stats = Stats(luck=10)
+    repr_str = repr(stats)
+
+    assert "CRIT_BONUS=" in repr_str
+    assert "HIT_BONUS=" in repr_str