feat: update package.json and add Express API

- Updated package description and main entry point in package.json
- Added start, build, test, and lint scripts
- Introduced express as a dependency
- Added eslint, jest, and supertest as devDependencies
- Created src/app.js for the Express API with routes for health check and text processing
- Added src/server.js to start the Express server

Author: codebytes

node-example/__tests__/app.test.js

@@ -0,0 +1,39 @@
+const request = require('supertest');
+const app = require('../src/app');
+
+describe('API endpoints', () => {
+  test('GET / returns welcome message', async () => {
+    const res = await request(app).get('/');
+    expect(res.status).toBe(200);
+    expect(res.body.message).toContain('Node.js Example API');
+  });
+
+  test('GET /health returns healthy status', async () => {
+    const res = await request(app).get('/health');
+    expect(res.status).toBe(200);
+    expect(res.body.status).toBe('healthy');
+  });
+
+  test('POST /removespace removes whitespace from text', async () => {
+    const res = await request(app)
+      .post('/removespace')
+      .send({ text: 'hello world' });
+    expect(res.status).toBe(200);
+    expect(res.body.result).toBe('helloworld');
+  });
+
+  test('POST /removespace returns 400 when text is missing', async () => {
+    const res = await request(app)
+      .post('/removespace')
+      .send({});
+    expect(res.status).toBe(400);
+    expect(res.body.error).toContain('Missing');
+  });
+
+  test('POST /removespace returns 400 for non-string input', async () => {
+    const res = await request(app)
+      .post('/removespace')
+      .send({ text: 123 });
+    expect(res.status).toBe(400);
+  });
+});

node-example/__tests__/index.test.js

@@ -0,0 +1,23 @@
+const removespace = require('../index');
+
+describe('removespace utility', () => {
+  test('removes spaces from a string', () => {
+    expect(removespace('a b c')).toBe('abc');
+  });
+
+  test('removes tabs and newlines', () => {
+    expect(removespace('a\tb\nc')).toBe('abc');
+  });
+
+  test('returns empty string when given only whitespace', () => {
+    expect(removespace('   ')).toBe('');
+  });
+
+  test('returns same string when no whitespace present', () => {
+    expect(removespace('abc')).toBe('abc');
+  });
+
+  test('throws TypeError for non-string input', () => {
+    expect(() => removespace(123)).toThrow(TypeError);
+  });
+});

node-example/eslint.config.js

@@ -0,0 +1,36 @@
+const { defineConfig } = require("eslint/config");
+const js = require("@eslint/js");
+
+module.exports = defineConfig([
+  js.configs.recommended,
+  {
+    languageOptions: {
+      globals: {
+        require: "readonly",
+        module: "readonly",
+        exports: "readonly",
+        __dirname: "readonly",
+        __filename: "readonly",
+        process: "readonly",
+        console: "readonly",
+      },
+    },
+    rules: {
+      "no-unused-vars": "warn",
+    },
+  },
+  {
+    files: ["__tests__/**"],
+    languageOptions: {
+      globals: {
+        describe: "readonly",
+        test: "readonly",
+        expect: "readonly",
+        beforeAll: "readonly",
+        afterAll: "readonly",
+        beforeEach: "readonly",
+        afterEach: "readonly",
+      },
+    },
+  },
+]);

node-example/index.js

@@ -1,4 +1,4 @@
 module.exports = function removespace(string) {
-    if (typeof string !== "string") throw new TypeError("Meh! Enter a string!!");
-    return string.replace(/\s/g, "");
+  if (typeof string !== "string") throw new TypeError("Meh! Enter a string!!");
+  return string.replace(/\s/g, "");
 };