@ideal-photography/shared/services/__tests__/StockService.test.js

Shared MongoDB and utility logic for Ideal Photography PWAs: users, products, services, bookings, orders/cart, galleries, reviews, notifications, campaigns, settings, audit logs, minimart items/orders, and push notification subscriptions.

import { jest } from '@jest/globals';

// Create mock query builder with lean() method
const createMockQueryBuilder = (resolveValue) => ({
    lean: jest.fn(() => Promise.resolve(resolveValue))
});

// Mock mongoDB module before importing StockService
jest.unstable_mockModule('../../mongoDB/index.js', () => {
    return {
        models: {
            Equipment: {
                findById: jest.fn()
            },
            MinimartItem: {
                findById: jest.fn()
            },
            Order: {
                findById: jest.fn(),
                findByIdAndUpdate: jest.fn(),
                updateOne: jest.fn()
            },
        },
        mongoose: {
            startSession: jest.fn().mockResolvedValue({
                withTransaction: async (fn) => await fn(),
                endSession: jest.fn()
            })
        },
    };
});

// Import after mocking
const { StockService } = await import('../StockService.js');
const { models } = await import('../../mongoDB/index.js');

describe('StockService.checkAvailability', () => {
    beforeEach(() => {
        jest.clearAllMocks();
    });

    it('returns available for equipment with enough stock', async () => {
        const equipmentData = {
            _id: '507f1f77bcf86cd799439011',
            inventory: { availableUnits: 10 }
        };
        models.Equipment.findById.mockReturnValue(createMockQueryBuilder(equipmentData));

        const res = await StockService.checkAvailability([
            { productId: '507f1f77bcf86cd799439011', productType: 'equipment_rental', quantity: 2 },
        ]);

        expect(res.available).toBe(true);
        expect(models.Equipment.findById).toHaveBeenCalledWith('507f1f77bcf86cd799439011');
    }, 10000); // Increase timeout to 10s

    it('returns not available for minimart out of stock', async () => {
        const minimartData = {
            _id: '507f1f77bcf86cd799439012',
            inventory: { stockQuantity: 1 }
        };
        models.MinimartItem.findById.mockReturnValue(createMockQueryBuilder(minimartData));

        const res = await StockService.checkAvailability([
            { productId: '507f1f77bcf86cd799439012', productType: 'minimart', quantity: 5 },
        ]);

        expect(res.available).toBe(false);
        expect(models.MinimartItem.findById).toHaveBeenCalledWith('507f1f77bcf86cd799439012');
    }, 10000); // Increase timeout to 10s
});