ashen-realms/apps/api/src/inventory/inventory.service.spec.ts

import { Repository } from 'typeorm';
import { CharacterEquipment } from '../equipment/entities/character-equipment.entity';
import { CharacterItem } from '../items/entities/character-item.entity';
import { EquipmentSlot } from '../items/equipment-slot.enum';
import { ItemRarity } from '../items/item-rarity.enum';
import { ItemType } from '../items/item-type.enum';
import { InventoryService } from './inventory.service';

const CHARACTER_ID = 'character-1';

function characterItem(overrides: Partial<CharacterItem> = {}): CharacterItem {
  return {
    id: 'item-1',
    characterId: CHARACTER_ID,
    itemDefinitionId: 'def-1',
    quantity: 1,
    createdAt: new Date('2026-08-18T09:00:00.000Z'),
    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
    itemDefinition: {
      key: 'worn-short-sword',
      name: 'Abgenutztes Kurzschwert',
      description: 'Die Klinge eines Rekruten, öfter geschliffen als geführt.',
      rarity: ItemRarity.COMMON,
      type: ItemType.EQUIPMENT,
      equipmentSlot: EquipmentSlot.WEAPON,
      weaponDamage: 8,
      bonusAttack: 0,
      bonusHp: 0,
      bonusArmor: 0,
      iconPath: '/images/items/worn-short-sword.png',
    },
    ...overrides,
  } as CharacterItem;
}

describe('InventoryService', () => {
  it("returns only the current character's items with definition data, quantity, and equipped state", async () => {
    const items = [
      characterItem({ id: 'item-1', quantity: 1 }),
      characterItem({ id: 'item-2', quantity: 3, itemDefinitionId: 'def-2' }),
    ];
    const characterItems = {
      find: jest.fn().mockResolvedValue(items),
    } as unknown as Repository<CharacterItem>;
    const equipment = {
      find: jest.fn().mockResolvedValue([
        {
          characterItemId: 'item-1',
          slot: EquipmentSlot.WEAPON,
        } as CharacterEquipment,
      ]),
    } as unknown as Repository<CharacterEquipment>;
    const service = new InventoryService(characterItems, equipment);

    const result = await service.getInventory(CHARACTER_ID);

    expect(characterItems.find).toHaveBeenCalledWith({
      where: { characterId: CHARACTER_ID },
      relations: { itemDefinition: true },
      order: { createdAt: 'ASC' },
    });
    expect(result.items).toEqual([
      {
        id: 'item-1',
        quantity: 1,
        equipped: true,
        item: {
          key: 'worn-short-sword',
          name: 'Abgenutztes Kurzschwert',
          description: 'Die Klinge eines Rekruten, öfter geschliffen als geführt.',
          rarity: 'COMMON',
          equipmentSlot: 'WEAPON',
          weaponDamage: 8,
          bonusAttack: 0,
          bonusHp: 0,
          bonusArmor: 0,
          iconPath: '/images/items/worn-short-sword.png',
        },
      },
      {
        id: 'item-2',
        quantity: 3,
        equipped: false,
        item: expect.objectContaining({ key: 'worn-short-sword' }),
      },
    ]);
  });

  it('returns an empty list when the character owns nothing', async () => {
    const characterItems = {
      find: jest.fn().mockResolvedValue([]),
    } as unknown as Repository<CharacterItem>;
    const equipment = {
      find: jest.fn().mockResolvedValue([]),
    } as unknown as Repository<CharacterEquipment>;
    const service = new InventoryService(characterItems, equipment);

    await expect(service.getInventory(CHARACTER_ID)).resolves.toEqual({
      items: [],
    });
  });
});