add Jest unit/integration tests and Jest config

Author: Sran012

frontend/package-lock.json

@@ -11,7 +11,7 @@
     "react": "^17.0.1",
     "react-dom": "^17.0.1",
     "react-icons": "^5.3.0",
-    "react-scripts": "5.0.1",
+    "react-scripts": "^5.0.1",
     "web-vitals": "^0.2.4"
   },
   "scripts": {

frontend/package.json

@@ -0,0 +1,14 @@
+module.exports = {
+  testEnvironment: 'node',
+  testMatch: ['**/__tests__/**/*.js', '**/?(*.)+(spec|test).js'],
+  collectCoverageFrom: [
+    'src/**/*.js',
+    '!src/**/*.test.js',
+    '!src/**/*.spec.js'
+  ],
+  coverageDirectory: 'coverage',
+  coverageReporters: ['text', 'lcov', 'html'],
+  setupFilesAfterEnv: ['<rootDir>/tests/setup.js'],
+  testTimeout: 10000,
+  testPathIgnorePatterns: ['/node_modules/', '<rootDir>/frontend/'],
+};