feat(api): implement combat loot integration with hybrid static/procedural system
Add CombatLootService that orchestrates loot generation from combat, supporting both static item drops (consumables, materials) and procedural equipment generation (weapons, armor with affixes). Key changes: - Extend LootEntry model with LootType enum (STATIC/PROCEDURAL) - Create StaticItemLoader service for consumables/materials from YAML - Create CombatLootService with full rarity formula incorporating: - Party average level - Enemy difficulty tier (EASY: +0%, MEDIUM: +5%, HARD: +15%, BOSS: +30%) - Character luck stat - Per-entry rarity bonus - Integrate with CombatService._calculate_rewards() for automatic loot gen - Add boss guaranteed drops via generate_boss_loot() New enemy variants (goblin family proof-of-concept): - goblin_scout (Easy) - static drops only - goblin_warrior (Medium) - static + procedural weapon drops - goblin_chieftain (Hard) - static + procedural weapon/armor drops Static items added: - consumables.yaml: health/mana potions, elixirs, food - materials.yaml: trophy items, crafting materials Tests: 59 new tests across 3 test files (all passing)
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api/tests/test_loot_entry.py
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api/tests/test_loot_entry.py
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"""
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Tests for LootEntry model with hybrid loot support.
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Tests the extended LootEntry dataclass that supports both static
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and procedural loot types with backward compatibility.
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"""
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import pytest
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from app.models.enemy import LootEntry, LootType
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class TestLootEntryBackwardCompatibility:
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"""Test that existing YAML format still works."""
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def test_from_dict_defaults_to_static(self):
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"""Old-style entries without loot_type should default to STATIC."""
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entry_data = {
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"item_id": "rusty_dagger",
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"drop_chance": 0.15,
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}
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entry = LootEntry.from_dict(entry_data)
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assert entry.loot_type == LootType.STATIC
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assert entry.item_id == "rusty_dagger"
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assert entry.drop_chance == 0.15
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assert entry.quantity_min == 1
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assert entry.quantity_max == 1
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def test_from_dict_with_all_old_fields(self):
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"""Test entry with all old-style fields."""
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entry_data = {
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"item_id": "gold_coin",
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"drop_chance": 0.50,
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"quantity_min": 1,
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"quantity_max": 3,
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}
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entry = LootEntry.from_dict(entry_data)
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assert entry.loot_type == LootType.STATIC
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assert entry.item_id == "gold_coin"
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assert entry.drop_chance == 0.50
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assert entry.quantity_min == 1
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assert entry.quantity_max == 3
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def test_to_dict_includes_loot_type(self):
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"""Serialization should include loot_type."""
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entry = LootEntry(
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loot_type=LootType.STATIC,
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item_id="health_potion",
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drop_chance=0.2
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)
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data = entry.to_dict()
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assert data["loot_type"] == "static"
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assert data["item_id"] == "health_potion"
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assert data["drop_chance"] == 0.2
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class TestLootEntryStaticType:
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"""Test static loot entries."""
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def test_static_entry_creation(self):
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"""Test creating a static loot entry."""
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entry = LootEntry(
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loot_type=LootType.STATIC,
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item_id="goblin_ear",
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drop_chance=0.60,
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quantity_min=1,
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quantity_max=2
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)
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assert entry.loot_type == LootType.STATIC
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assert entry.item_id == "goblin_ear"
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assert entry.item_type is None
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assert entry.rarity_bonus == 0.0
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def test_static_from_dict_explicit(self):
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"""Test parsing explicit static entry."""
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entry_data = {
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"loot_type": "static",
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"item_id": "health_potion_small",
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"drop_chance": 0.10,
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}
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entry = LootEntry.from_dict(entry_data)
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assert entry.loot_type == LootType.STATIC
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assert entry.item_id == "health_potion_small"
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def test_static_to_dict_omits_procedural_fields(self):
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"""Static entries should omit procedural-only fields."""
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entry = LootEntry(
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loot_type=LootType.STATIC,
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item_id="gold_coin",
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drop_chance=0.5
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)
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data = entry.to_dict()
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assert "item_id" in data
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assert "item_type" not in data
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assert "rarity_bonus" not in data
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class TestLootEntryProceduralType:
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"""Test procedural loot entries."""
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def test_procedural_entry_creation(self):
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"""Test creating a procedural loot entry."""
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entry = LootEntry(
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loot_type=LootType.PROCEDURAL,
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item_type="weapon",
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drop_chance=0.10,
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rarity_bonus=0.15
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)
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assert entry.loot_type == LootType.PROCEDURAL
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assert entry.item_type == "weapon"
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assert entry.rarity_bonus == 0.15
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assert entry.item_id is None
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def test_procedural_from_dict(self):
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"""Test parsing procedural entry from dict."""
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entry_data = {
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"loot_type": "procedural",
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"item_type": "armor",
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"drop_chance": 0.08,
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"rarity_bonus": 0.05,
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}
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entry = LootEntry.from_dict(entry_data)
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assert entry.loot_type == LootType.PROCEDURAL
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assert entry.item_type == "armor"
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assert entry.drop_chance == 0.08
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assert entry.rarity_bonus == 0.05
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def test_procedural_to_dict_includes_item_type(self):
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"""Procedural entries should include item_type and rarity_bonus."""
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entry = LootEntry(
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loot_type=LootType.PROCEDURAL,
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item_type="weapon",
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drop_chance=0.15,
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rarity_bonus=0.10
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)
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data = entry.to_dict()
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assert data["loot_type"] == "procedural"
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assert data["item_type"] == "weapon"
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assert data["rarity_bonus"] == 0.10
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assert "item_id" not in data
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def test_procedural_default_rarity_bonus(self):
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"""Procedural entries default to 0.0 rarity bonus."""
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entry_data = {
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"loot_type": "procedural",
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"item_type": "weapon",
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"drop_chance": 0.10,
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}
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entry = LootEntry.from_dict(entry_data)
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assert entry.rarity_bonus == 0.0
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class TestLootTypeEnum:
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"""Test LootType enum values."""
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def test_static_value(self):
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"""Test STATIC enum value."""
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assert LootType.STATIC.value == "static"
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def test_procedural_value(self):
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"""Test PROCEDURAL enum value."""
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assert LootType.PROCEDURAL.value == "procedural"
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def test_from_string(self):
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"""Test creating enum from string."""
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assert LootType("static") == LootType.STATIC
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assert LootType("procedural") == LootType.PROCEDURAL
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def test_invalid_string_raises(self):
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"""Test that invalid string raises ValueError."""
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with pytest.raises(ValueError):
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LootType("invalid")
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class TestLootEntryRoundTrip:
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"""Test serialization/deserialization round trips."""
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def test_static_round_trip(self):
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"""Static entry should survive round trip."""
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original = LootEntry(
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loot_type=LootType.STATIC,
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item_id="health_potion_small",
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drop_chance=0.15,
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quantity_min=1,
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quantity_max=2
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)
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data = original.to_dict()
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restored = LootEntry.from_dict(data)
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assert restored.loot_type == original.loot_type
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assert restored.item_id == original.item_id
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assert restored.drop_chance == original.drop_chance
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assert restored.quantity_min == original.quantity_min
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assert restored.quantity_max == original.quantity_max
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def test_procedural_round_trip(self):
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"""Procedural entry should survive round trip."""
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original = LootEntry(
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loot_type=LootType.PROCEDURAL,
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item_type="weapon",
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drop_chance=0.25,
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rarity_bonus=0.15,
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quantity_min=1,
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quantity_max=1
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)
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data = original.to_dict()
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restored = LootEntry.from_dict(data)
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assert restored.loot_type == original.loot_type
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assert restored.item_type == original.item_type
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assert restored.drop_chance == original.drop_chance
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assert restored.rarity_bonus == original.rarity_bonus
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