test: add unit tests generated by ToTheos

__mocks__/next-auth.js

@@ -0,0 +1,24 @@
+// Mock for next-auth
+const mockSession = jest.fn();
+const mockSignIn = jest.fn();
+const mockSignOut = jest.fn();
+const mockAuth = jest.fn();
+
+module.exports = {
+  __esModule: true,
+  default: jest.fn(() => ({
+    handlers: { GET: jest.fn(), POST: jest.fn() },
+    signIn: mockSignIn,
+    signOut: mockSignOut,
+    auth: mockAuth,
+  })),
+  NextAuth: jest.fn(() => ({
+    handlers: { GET: jest.fn(), POST: jest.fn() },
+    signIn: mockSignIn,
+    signOut: mockSignOut,
+    auth: mockAuth,
+  })),
+  auth: mockAuth,
+  signIn: mockSignIn,
+  signOut: mockSignOut,
+};

__mocks__/next-auth/jwt.js

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+// Mock for next-auth/jwt
+module.exports = {
+  __esModule: true,
+  JWT: jest.fn(),
+  encode: jest.fn(),
+  decode: jest.fn(),
+};

__mocks__/next-auth/providers/google.js

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+// Mock for next-auth/providers/google
+module.exports = {
+  __esModule: true,
+  default: jest.fn(() => ({
+    id: 'google',
+    name: 'Google',
+    type: 'oauth',
+    clientId: process.env.GOOGLE_ID,
+    clientSecret: process.env.GOOGLE_SECRET,
+  })),
+};

babel.config.js

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+module.exports = {
+  presets: [
+    ['@babel/preset-env', { targets: { node: 'current' } }],
+    '@babel/preset-react',
+    '@babel/preset-typescript',
+  ],
+};

jest.config.js

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+/** @type {import("jest").Config} **/
+module.exports = {
+  testEnvironment: "jsdom",
+  transform: {
+    "^.+\\.(js|jsx|ts|tsx)$": "babel-jest",
+  },
+  moduleNameMapper: {
+    "\\.(css|less|scss|sass)$": "identity-obj-proxy",
+    "^@/(.*)$": "<rootDir>/src/$1",
+    "^next-auth/jwt$": "<rootDir>/__mocks__/next-auth/jwt.js",
+    "^next-auth$": "<rootDir>/__mocks__/next-auth.js",
+    "^next-auth/providers/google$": "<rootDir>/__mocks__/next-auth/providers/google.js"
+  },
+  setupFilesAfterEnv: ['<rootDir>/setupTests.js'],
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  testMatch: [
+    "**/__tests__/**/*.[jt]s?(x)",
+    "**/?(*.)+(spec|test).[jt]s?(x)"
+  ],
+};