Unit test for Health Check router

backend/routers/healthCheck.router.test.js

@@ -0,0 +1,42 @@
+// Mock the healthCheck controller
+jest.mock('../controllers/healthCheck.controller.js');
+
+// Import the healthCheck router and controller
+const healthCheck = require('./healthCheck.router.js');
+const { HealthCheckController } = require('../controllers');
+
+// Create a mock test server
+const express = require('express');
+const supertest = require('supertest');
+const testapp = express();
+testapp.use('/api/healthcheck', healthCheck);
+
+// Set up mock request for the controller
+const request = supertest(testapp);
+
+describe('Unit testing for Health Check Router', () => {
+  // Clear all mocks after each test
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  describe('READ', () => {
+    it('should return status code 200 and message "I\'m Alive" with GET /api/healthcheck', async (done) => {
+      // Mock the controller method
+      HealthCheckController.isAlive.mockImplementationOnce((req, res) => {
+        res.status(200).send("I'm Alive!");
+      });
+
+      // Call GET API endpoint
+      const response = await request.get('/api/healthcheck');
+
+      // Test
+      expect(HealthCheckController.isAlive).toHaveBeenCalled();
+      expect(response.status).toBe(200);
+      expect(response.text).toBe("I'm Alive!");
+
+      // Marks completion of the test
+      done();
+    });
+  });
+});