test: add e2e and unit test suite

- Add comprehensive e2e tests against real GSoC 2025 dataset (251 contributors)
- Add unit tests for API, Util, and refresh modules
- Test all HTTP endpoints: /data, /config, /log, /stats, /rank, /contributor,
  /login, /setStartDate, /setInterval, /setIncludedRepositories, /remove
- Validate cross-endpoint consistency, invalid JSON handling, unknown routes
- Fixture-based test isolation using temp directories and env-var overrides
- Add npm test script (installs server deps before running tests)
- Requires Node.js 18+

Author: amitb0ra

package.json

@@ -29,6 +29,7 @@
     "start": "npm run build && NODE_ENV=development webpack-dev-server --host 0.0.0.0 --open --hot --config build/webpack.config.js",
     "build": "npm --prefix admin run build && NODE_ENV=production webpack --config build/webpack.config.js",
     "serve": "cd src/server && NODE_ENV=development node app.js",
+    "test": "npm --prefix src/server install && node --test 'tests/**/*.test.js'",
     "lint": "eslint ."
   },
   "husky": {

tests/e2e/fixtures/admindata.json

@@ -0,0 +1 @@
+[{"username":"dhairyashiil","avatarUrl":"https://avatars.githubusercontent.com/u/93669429?v=4"}]

tests/e2e/fixtures/config.json

@@ -0,0 +1,12 @@
+{
+  "organization": "RocketChat",
+  "organizationHomepage": "https://rocket.chat/",
+  "organizationGithubUrl": "https://github.com/RocketChat",
+  "authToken": "fake-token-for-e2e",
+  "adminPassword": "e2e-test-pwd",
+  "delay": "10",
+  "serverPort": "63111",
+  "startDate": "2024-12-01",
+  "contributors": ["dhairyashiil"],
+  "includedRepositories": ["Rocket.Chat"]
+}

tests/e2e/fixtures/configBackup.json

@@ -0,0 +1 @@
+{}