Rest service

data/products.json

+[
+  {
+      "name": "tgv",
+      "cfp": 0.002
+  },
+  {
+      "name": "metro",
+      "cfp": 0.003
+  },
+  {
+      "name": "rer",
+      "cfp": 0.07
+  },
+  {
+      "name": "vae",
+      "cfp": 0.1
+  },
+  {
+      "name": "bus-electric",
+      "cfp": 0.2
+  },
+  {
+      "name": "autocar",
+      "cfp": 0.3
+  },
+  {
+      "name": "ter",
+      "cfp": 0.3
+  },
+  {
+      "name": "electrical-car-covoit",
+      "cfp": 0.5
+  },
+  {
+      "name": "bus-thermique",
+      "cfp": 0.5
+  },
+  {
+      "name": "thermal-car",
+      "cfp": 2.1
+  },
+  {
+      "name": "scooter",
+      "cfp": 0.7
+  },
+  {
+      "name": "moto",
+      "cfp": 1.9
+  },
+  {
+      "name": "avion",
+      "cfp": 1.5
+  },
+  {
+      "name": "electrical-car",
+      "cfp": 1
+  },
+  {
+      "name": "thermal-car-covoit",
+      "cfp": 1.1
+  },
+  {
+      "name": "bus-thermique",
+      "cfp": 1.1
+  },
+  {
+      "name": "repas-vegetalien",
+      "cfp": 0.4
+  },
+  {
+      "name": "repas-vegetarien",
+      "cfp": 0.5
+  },
+  {
+      "name": "repas-poisson",
+      "cfp": 1.1
+  },
+  {
+      "name": "repas-poulet",
+      "cfp": 1.6
+  },
+  {
+      "name": "repas-boeuf",
+      "cfp": 7
+  },
+  {
+      "name": "chaffage-electric",
+      "cfp": 600
+  },
+  {
+      "name": "chaffage-gaz",
+      "cfp": 3800
+  },
+  {
+      "name": "chaffage-fioul",
+      "cfp": 5300
+  }
+]
\ No newline at end of file

package.json

@@ -13,13 +13,19 @@
   "license": "ISC",
   "devDependencies": {
     "@types/eslint": "^8.44.7",
+    "@types/express": "^4.17.21",
     "@types/jest": "^29.5.10",
+    "@types/supertest": "^2.0.16",
     "@typescript-eslint/eslint-plugin": "^6.12.0",
     "eslint": "^8.54.0",
     "eslint-config-airbnb-base": "^15.0.0",
     "jest": "^29.7.0",
+    "supertest": "^6.3.3",
     "ts-jest": "^29.1.1",
     "ts-node-dev": "^2.0.0",
     "typescript": "^5.2.2"
+  },
+  "dependencies": {
+    "express": "^4.18.2"
   }
 }

src/index.ts

-function display(message: string) {
-  console.log(message);
-}
-display('Hello world!');
+import express from 'express';
+import { ProductsRepository, Product } from './products';
+import fs from 'fs';
+
+export const service = express();
+
+service.get('/products', (request, response) => {
+  const products: Product[] = JSON.parse(fs.readFileSync('./data/products.json', 'utf-8'));
+  const productsRepository = new ProductsRepository(products);
+  response.status(200).json(productsRepository.all);
+});
+
+service.listen(8888);
\ No newline at end of file

tests/e2e/getProducts.spec.ts

+import request from 'supertest';
+import {service} from '../../src/index';
+import { ProductsRepository } from '../../src/products';
+
+describe('GET /products', () => {
+  it('should send a response with all the products in its body', async () => {
+    const spy =  jest.spyOn(ProductsRepository.prototype, 'all', 'get');
+    await request(service).get('/products')
+      .expect(200)
+      .expect('content-type', /json/);
+    expect(spy).toHaveBeenCalled();
+  });
+});

tsconfig.json

 {
   "compilerOptions": {
     "strict": true,
-    "outDir": "dist"
+    "outDir": "dist",
+    "esModuleInterop": true
   }
 }
\ No newline at end of file