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api/tests/test_stats.py

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+"""
+Unit tests for Stats dataclass.
+
+Tests computed properties, serialization, and basic operations.
+"""
+
+import pytest
+from app.models.stats import Stats
+
+
+def test_stats_default_values():
+    """Test that Stats initializes with default values."""
+    stats = Stats()
+
+    assert stats.strength == 10
+    assert stats.dexterity == 10
+    assert stats.constitution == 10
+    assert stats.intelligence == 10
+    assert stats.wisdom == 10
+    assert stats.charisma == 10
+
+
+def test_stats_custom_values():
+    """Test creating Stats with custom values."""
+    stats = Stats(
+        strength=15,
+        dexterity=12,
+        constitution=14,
+        intelligence=8,
+        wisdom=10,
+        charisma=11,
+    )
+
+    assert stats.strength == 15
+    assert stats.dexterity == 12
+    assert stats.constitution == 14
+    assert stats.intelligence == 8
+    assert stats.wisdom == 10
+    assert stats.charisma == 11
+
+
+def test_hit_points_calculation():
+    """Test HP calculation: 10 + (constitution × 2)."""
+    stats = Stats(constitution=10)
+    assert stats.hit_points == 30  # 10 + (10 × 2)
+
+    stats = Stats(constitution=15)
+    assert stats.hit_points == 40  # 10 + (15 × 2)
+
+    stats = Stats(constitution=20)
+    assert stats.hit_points == 50  # 10 + (20 × 2)
+
+
+def test_mana_points_calculation():
+    """Test MP calculation: 10 + (intelligence × 2)."""
+    stats = Stats(intelligence=10)
+    assert stats.mana_points == 30  # 10 + (10 × 2)
+
+    stats = Stats(intelligence=15)
+    assert stats.mana_points == 40  # 10 + (15 × 2)
+
+    stats = Stats(intelligence=8)
+    assert stats.mana_points == 26  # 10 + (8 × 2)
+
+
+def test_defense_calculation():
+    """Test defense calculation: constitution // 2."""
+    stats = Stats(constitution=10)
+    assert stats.defense == 5  # 10 // 2
+
+    stats = Stats(constitution=15)
+    assert stats.defense == 7  # 15 // 2
+
+    stats = Stats(constitution=21)
+    assert stats.defense == 10  # 21 // 2
+
+
+def test_resistance_calculation():
+    """Test resistance calculation: wisdom // 2."""
+    stats = Stats(wisdom=10)
+    assert stats.resistance == 5  # 10 // 2
+
+    stats = Stats(wisdom=14)
+    assert stats.resistance == 7  # 14 // 2
+
+    stats = Stats(wisdom=9)
+    assert stats.resistance == 4  # 9 // 2
+
+
+def test_stats_serialization():
+    """Test to_dict() serialization."""
+    stats = Stats(
+        strength=15,
+        dexterity=12,
+        constitution=14,
+        intelligence=10,
+        wisdom=11,
+        charisma=8,
+    )
+
+    data = stats.to_dict()
+
+    assert data["strength"] == 15
+    assert data["dexterity"] == 12
+    assert data["constitution"] == 14
+    assert data["intelligence"] == 10
+    assert data["wisdom"] == 11
+    assert data["charisma"] == 8
+
+
+def test_stats_deserialization():
+    """Test from_dict() deserialization."""
+    data = {
+        "strength": 18,
+        "dexterity": 14,
+        "constitution": 16,
+        "intelligence": 12,
+        "wisdom": 10,
+        "charisma": 9,
+    }
+
+    stats = Stats.from_dict(data)
+
+    assert stats.strength == 18
+    assert stats.dexterity == 14
+    assert stats.constitution == 16
+    assert stats.intelligence == 12
+    assert stats.wisdom == 10
+    assert stats.charisma == 9
+
+
+def test_stats_deserialization_with_missing_values():
+    """Test from_dict() with missing values (should use defaults)."""
+    data = {
+        "strength": 15,
+        # Missing other stats
+    }
+
+    stats = Stats.from_dict(data)
+
+    assert stats.strength == 15
+    assert stats.dexterity == 10  # Default
+    assert stats.constitution == 10  # Default
+    assert stats.intelligence == 10  # Default
+    assert stats.wisdom == 10  # Default
+    assert stats.charisma == 10  # Default
+
+
+def test_stats_round_trip_serialization():
+    """Test that serialization and deserialization preserve data."""
+    original = Stats(
+        strength=20,
+        dexterity=15,
+        constitution=18,
+        intelligence=10,
+        wisdom=12,
+        charisma=14,
+    )
+
+    # Serialize then deserialize
+    data = original.to_dict()
+    restored = Stats.from_dict(data)
+
+    assert restored.strength == original.strength
+    assert restored.dexterity == original.dexterity
+    assert restored.constitution == original.constitution
+    assert restored.intelligence == original.intelligence
+    assert restored.wisdom == original.wisdom
+    assert restored.charisma == original.charisma
+
+
+def test_stats_copy():
+    """Test that copy() creates an independent copy."""
+    original = Stats(strength=15, dexterity=12, constitution=14)
+    copy = original.copy()
+
+    assert copy.strength == original.strength
+    assert copy.dexterity == original.dexterity
+    assert copy.constitution == original.constitution
+
+    # Modify copy
+    copy.strength = 20
+
+    # Original should be unchanged
+    assert original.strength == 15
+    assert copy.strength == 20
+
+
+def test_stats_repr():
+    """Test string representation."""
+    stats = Stats(strength=15, constitution=12, intelligence=10)
+    repr_str = repr(stats)
+
+    assert "STR=15" in repr_str
+    assert "CON=12" in repr_str
+    assert "INT=10" in repr_str
+    assert "HP=" in repr_str
+    assert "MP=" in repr_str