Initial draft for adding pact tests. Failing with error before undefined

package.json

@@ -18,13 +18,22 @@
     "react-dom": "^16.13.1",
     "react-dragger": "^1.3.0",
     "react-scripts": "3.4.3",
-    "startbootstrap-simple-sidebar": "^5.1.2"
+    "startbootstrap-simple-sidebar": "^5.1.2",
+    "cors": "^2.8.5",
+    "express": "^4.17.1"
   },
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "test:consumer": "mocha --exit --timeout 30000 consumer.pact.spec.js",
+    "test:provider": "mocha --exit --timeout 30000 provider.pact.spec.js",
+    "publish": "npx pact-broker publish ./pacts --consumer-app-version 1.0.0-someconsumersha --tag master",
+    "can-deploy:consumer": "npx pact-broker can-i-deploy --pacticipant katacoda-consumer --version 1.0.0-someconsumersha --to prod",
+    "can-deploy:provider": "npx pact-broker can-i-deploy --pacticipant katacoda-provider --version 1.0.0-someprovidersha --to prod",
+    "deploy:consumer": "npx pact-broker create-version-tag --pacticipant katacoda-consumer --version 1.0.0-someconsumersha --tag prod",
+    "deploy:provider": "npx pact-broker create-version-tag --pacticipant katacoda-provider --version 1.0.0-someprovidersha --tag prod"
   },
   "eslintConfig": {
     "extends": "react-app"
@@ -42,6 +51,9 @@
     ]
   },
   "devDependencies": {
-    "react-router-dom": "^5.2.0"
+    "react-router-dom": "^5.2.0",
+    "@pact-foundation/pact": "^9.9.12",
+    "chai": "^4.2.0",
+    "mocha": "^8.1.3"
   }
 }

src/api/api.js

@@ -0,0 +1,15 @@
+const axios = require('axios');
+const { Product } = require('../model/Product');
+
+class ProductApiClient {
+    constructor(url) {
+        this.url = url
+    }
+
+    async getProduct(id) {
+        return axios.get(`${this.url}/products/${id}`).then(r => new Product(r.data.id, r.data.name, r.data.type));
+    }
+}
+module.exports = {
+    ProductApiClient
+}

src/model/Category.js

@@ -0,0 +1,9 @@
+class Category {
+    constructor(id, name) {
+        this.id = id
+        this.name = name
+    }
+}
+module.exports = {
+    Category
+}

src/model/Product.js

@@ -0,0 +1,10 @@
+class Product {
+    constructor(id, name, type) {
+        this.id = id
+        this.name = name
+        this.type = type
+    }
+}
+module.exports = {
+    Product
+}

src/pact/consumer.pact.spec.js

@@ -0,0 +1,50 @@
+// (1) Import the pact library and matching methods
+const { Pact } = require ('@pact-foundation/pact');
+const { ProductApiClient } = require ('../api/api');
+const { Product } = require ('../model/Product');
+const { like, regex } = require ('@pact-foundation/pact/dsl/matchers');
+const chai = require("chai")
+const expect = chai.expect
+
+// (2) Configure our Pact library
+const mockProvider = new Pact({
+    consumer: 'katacoda-consumer',
+    provider: 'katacoda-provider',
+    cors: true // needed for katacoda environment
+});
+
+
+describe('Products API test', () => {
+    // (3) Setup Pact lifecycle hooks
+    before(() => mockProvider.setup());
+    afterEach(() => mockProvider.verify());
+    after(() => mockProvider.finalize());
+
+    it('get product by ID', async () => {
+        // (4) Arrange
+        const expectedProduct = { id: 10, type: 'pizza', name: 'Margharita' }
+
+        await mockProvider.addInteraction({
+            state: 'a product with ID 10 exists',
+            uponReceiving: 'a request to get a product',
+            withRequest: {
+                method: 'GET',
+                path: '/products/10'
+            },
+            willRespondWith: {
+                status: 200,
+                headers: {
+                    'Content-Type': regex({generate: 'application/json; charset=utf-8', matcher: '^application\/json'}),
+                },
+                body: like(expectedProduct),
+            },
+        });
+
+        // (5) Act
+        const api = new ProductApiClient(mockProvider.mockService.baseUrl);
+        const product = await api.getProduct(10);
+
+        // (6) Assert that we got the expected response
+        expect(product).to.deep.equal(new Product(10, 'Margharita', 'pizza'));
+    });
+});