overleaf/services/filestore/.eslintrc

{
  "extends": [
    "standard",
    "prettier",
    "prettier/standard",
  ],
  "plugins": [
    "mocha",
    "chai-expect",
    "chai-friendly"
  ],
  "parser": "babel-eslint",
  "env": {
    "mocha": true
  },
  "rules": {
    // Swap the no-unused-expressions rule with a more chai-friendly one
    "no-unused-expressions": 0,
    "chai-friendly/no-unused-expressions": "error"
  },
  "overrides": [
    {
      // Test specific rules
      "files": ["**/test/*/src/**/*.js"],
      "globals": {
        "expect": true
      },
      "rules": {
        // mocha-specific rules
        "mocha/handle-done-callback": "error",
        "mocha/no-exclusive-tests": "error",
        "mocha/no-global-tests": "error",
        "mocha/no-identical-title": "error",
        "mocha/no-nested-tests": "error",
        "mocha/no-pending-tests": "error",
        "mocha/no-skipped-tests": "error",
        "mocha/no-mocha-arrows": "error",

        // chai-specific rules
        "chai-expect/missing-assertion": "error",
        "chai-expect/terminating-properties": "error",

        // prefer-arrow-callback applies to all callbacks, not just ones in mocha tests.
        // we don't enforce this at the top-level - just in tests to manage `this` scope
        // based on mocha's context mechanism
        "mocha/prefer-arrow-callback": "error"
      }
    },
    {
      // Frontend test specific rules
      "files": ["**/test/frontend/**/*.js"],
      "globals": {
        "expect": true,
        "define": true,
        "$": true
      }
    },
    {
      // Backend specific rules
      "files": ["**/app/src/**/*.js"],
      "rules": {
        // don't allow console.log in backend code
        "no-console": "error"
      }
    }
  ]
}