add test and husky hooks

.eslintignore

@@ -1 +1,2 @@
-jest.config.js
+jest.config.js
+dist/

.husky/pre-commit

@@ -0,0 +1 @@
+npm run lint

.husky/pre-push

@@ -0,0 +1,2 @@
+npm run build
+npm test

package.json

@@ -5,8 +5,11 @@
  "main": "index.ts",
  "scripts": {
  "dev": "nodemon ./src/index.ts",
+ "build": "tsc",
+ "start": "node ./dist/index.js",
  "test": "jest",
- "lint": "eslint ."
+ "lint": "eslint .",
+ "prepare": "husky"
  },
  "author": "",
  "license": "ISC",
@@ -25,6 +28,7 @@
  "eslint": "^8.56.0",
  "eslint-config-prettier": "^9.1.0",
  "http-proxy-middleware": "^2.0.6",
+ "husky": "^9.0.11",
  "jest": "^29.7.0",
  "nodemon": "^3.0.3",
  "prettier": "3.2.5",

src/router.ts

@@ -2,7 +2,6 @@ import express from "express";
 import { parseConfig } from "./utils/config/parse-config";
 import { createProxies } from "./utils/proxy/create-proxies";
 
-// TODO: prevent the app from crashing if the config is invalid
 const config = parseConfig("config.yml");
 
 const router = express.Router();

src/utils/config/validate-config.test.ts

@@ -0,0 +1,96 @@
+import { validateConfig } from "./validate-config";
+import { Config } from "../../types/config";
+
+describe("validateConfig", () => {
+ it("should not throw an error if config is valid", () => {
+ const validConfig: Config = {
+ endpoints: [
+ {
+ name: "endpoint1",
+ method: "GET",
+ path: "/path1",
+ destination: {
+ url: "http:https://example.com",
+ },
+ },
+ {
+ name: "endpoint2",
+ method: "POST",
+ path: "/path2",
+ destination: {
+ url: "http:https://example.com",
+ },
+ },
+ ],
+ };
+
+ expect(() => validateConfig(validConfig)).not.toThrow();
+ });
+
+ it("should throw an error if endpoint names are duplicated", () => {
+ const invalidConfig: Config = {
+ endpoints: [
+ {
+ name: "duplicate",
+ method: "GET",
+ path: "/path1",
+ destination: {
+ url: "http:https://example.com",
+ },
+ },
+ {
+ name: "duplicate",
+ method: "GET",
+ path: "/path2",
+ destination: {
+ url: "http:https://example.com",
+ },
+ },
+ ],
+ };
+
+ expect(() => validateConfig(invalidConfig)).toThrow();
+ });
+
+ it("should throw an error if endpoint path/method combination is duplicated", () => {
+ const invalidConfig: Config = {
+ endpoints: [
+ {
+ name: "endpoint1",
+ method: "GET",
+ path: "/duplicate",
+ destination: {
+ url: "http:https://example.com",
+ },
+ },
+ {
+ name: "endpoint2",
+ method: "GET",
+ path: "/duplicate",
+ destination: {
+ url: "http:https://example.com",
+ },
+ },
+ ],
+ };
+
+ expect(() => validateConfig(invalidConfig)).toThrow();
+ });
+
+ it("should throw an error if destination URL is invalid", () => {
+ const invalidUrlConfig: Config = {
+ endpoints: [
+ {
+ name: "endpoint",
+ method: "GET",
+ path: "/path",
+ destination: {
+ url: "invalid_url",
+ },
+ },
+ ],
+ };
+
+ expect(() => validateConfig(invalidUrlConfig)).toThrow();
+ });
+});

tsconfig.json

@@ -0,0 +1,12 @@
+{
+ "compilerOptions": {
+ "target": "ES2022",
+ "module": "commonjs",
+ "esModuleInterop": true,
+ "resolveJsonModule": true,
+ "forceConsistentCasingInFileNames": true,
+ "strict": true,
+ "skipLibCheck": true,
+ "outDir": "./dist"
+ }
+}