test-assignment-parcellab/src/packages.controller.spec.ts

import { TestingModule } from '@nestjs/testing';
import request from 'supertest';
import { PackagesController } from './packages.controller';
import { createTestingModule, packagesServiceDependency } from './dependencies';
import { PackageInfo } from './storage/types';

describe('AppController', () => {
    it('returns a result from packages service', async () => {
        const testTrackingNumber = 'test-tracking-number';
        const testPackageResponse = {
            packageData: <PackageInfo>{
                articleName: 'fake name',
                articlePrice: 123,
                articleQuantity: 456,
                senderAddress: 'fake address',
                SKU: 'fake sku',
                status: 'delivery',
                carrier: 'DHL',
                trackingNumber: testTrackingNumber,
                receiverAddress: 'fake recipient address',
            },
            receiverWeather: {
                temperature: 'fake temperature',
                apparentTemperature: 'fake apparent temperature',
                relativeHumidity: 'fake relative humidity',
            },
        };
        const moduleFixture: TestingModule = await createTestingModule({
            controllers: [PackagesController],
            providers: [
                {
                    provide: packagesServiceDependency,
                    useValue: {
                        getPackageInfoWithWeather: (
                            carrier,
                            trackingNumber,
                        ) => {
                            if (
                                carrier === 'DHL' &&
                                trackingNumber === testTrackingNumber
                            ) {
                                return Promise.resolve(testPackageResponse);
                            }

                            return Promise.resolve(null);
                        },
                    },
                },
            ],
        }).compile();

        const app = moduleFixture.createNestApplication();
        await app.init();

        try {
            const appRequest = request(app.getHttpServer());
            await appRequest
                .get(`/packages/DHL/${testTrackingNumber}`)
                .expect(200)
                .expect(testPackageResponse);
            await appRequest
                .get(`/packages/UPS/${testTrackingNumber}`)
                .expect(404);
            await appRequest.get(`/packages/DHL/non-existent`).expect(404);
        } finally {
            await app.close();
        }
    });
});