Fix up the tests and user creation api behavior

.gitignore

@@ -0,0 +1,60 @@
+.env
+
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
+
+# 0x
+profile-*
+
+# mac files
+.DS_Store
+
+# vim swap files
+*.swp
+
+# webstorm
+.idea
+
+# vscode
+.vscode
+*code-workspace
+
+# clinic
+profile*
+*clinic*
+*flamegraph*

api/jest.config.js → api/jest.config.ts

@@ -1,4 +1,6 @@
-module.exports = {
+import type { Config } from '@jest/types';
+
+const config: Config.InitialOptions = {
   preset: 'ts-jest',
   testEnvironment: 'node',
   testMatch: ['**/test/**/*.test.ts'],
@@ -7,3 +9,5 @@ module.exports = {
     '^.+\\.ts$': 'ts-jest',
   },
 };
+
+export default config;

api/package.json

@@ -39,6 +39,7 @@
     "@types/jest": "^29.5.14",
     "@types/node": "^22.9.3",
     "jest": "^29.7.0",
+    "jest-mock-extended": "^4.0.0-beta1",
     "prisma": "^5.22.0",
     "ts-jest": "^29.2.5",
     "ts-node-dev": "^2.0.0",

api/prisma/migrations/20241129051559_make_user_name_unique/migration.sql

@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - A unique constraint covering the columns `[name]` on the table `User` will be added. If there are existing duplicate values, this will fail.
+
+*/
+-- CreateIndex
+CREATE UNIQUE INDEX "User_name_key" ON "User"("name");

api/prisma/schema.prisma

@@ -16,6 +16,6 @@ datasource db {
 model User {
   id       Int     @id @default(autoincrement())
   email    String  @unique
-  name     String
+  name     String  @unique
   password String
 }

api/src/handlers/user.handler.ts

@@ -1,6 +1,11 @@
 import { FastifyReply, FastifyRequest } from 'fastify';
-import { getAllUserNames, createUser } from '../services/user.service';
+import {
+  getAllUserNames,
+  createUser,
+  UserExistsError,
+} from '../services/user.service';
 import { CreateUserBody } from '../types/user.types';
+import { log } from 'console';
 
 export async function getUsersHandler(
   request: FastifyRequest,
@@ -22,6 +27,11 @@ export async function createUserHandler(
     const user = await createUser(name, email, password);
     reply.status(201).send(user);
   } catch (error) {
+    if (error instanceof UserExistsError) {
+      reply.conflict(error.message);
+      return;
+    }
+    log(error);
     reply.status(500).send({ error: 'An error occurred' });
   }
 }

api/src/plugins/errorHandler.ts

@@ -37,13 +37,15 @@ function errorHandler(fastify: FastifyInstance, opts: any, done: () => void) {
       return reply.status(400).send({
         error: 'Validation Error',
         details: error.validation.map((err) => ({
-          field: err.params.missingProperty || err.params.propertyName,
           message: customErrorMessage(err),
         })),
       });
     }
 
-    reply.status(500).send({ error: error.message });
+    if (error.statusCode) {
+      return reply.status(error.statusCode).send({ error: error.message });
+    }
+    return reply.status(500).send({ error: error.message });
   });
 
   done();

api/src/services/user.service.ts

@@ -3,6 +3,13 @@ import bcrypt from 'bcrypt';
 
 const SALT_ROUNDS = 10; // Industry standard
 
+export class UserExistsError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'UserExistsError';
+  }
+}
+
 export async function getAllUserNames() {
   const users = await prisma.user.findMany({
     select: {
@@ -18,6 +25,18 @@ export async function createUser(
   email: string,
   password: string,
 ) {
+  // Check if user exists by name or email
+  const existingUser = await prisma.user.findFirst({
+    where: {
+      OR: [{ name }, { email }],
+    },
+  });
+
+  if (existingUser) {
+    const field = existingUser.name === name ? 'name' : 'email';
+    throw new UserExistsError(`User with this ${field} already exists`);
+  }
+
   // Hash password before storing
   const hashedPassword = await bcrypt.hash(password, SALT_ROUNDS);
 

api/test/routes/api/user.test.ts

@@ -0,0 +1,104 @@
+// test/api/user.test.ts
+import Fastify, { FastifyInstance } from 'fastify';
+import sensible from '@fastify/sensible';
+import rootRoutes from '../../../src/routes';
+import errorHandler from '../../../src/plugins/errorHandler';
+
+describe('User API Routes', () => {
+  let app: FastifyInstance;
+
+  beforeAll(async () => {
+    app = Fastify();
+    await app.register(sensible);
+
+    // Register routes with API prefix and error handler
+    await app.register(
+      async (fastify) => {
+        await fastify.register(errorHandler);
+        await fastify.register(rootRoutes);
+      },
+      { prefix: '/api' },
+    );
+
+    await app.ready();
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+
+  describe('POST /api/user', () => {
+    const validUser = {
+      name: 'john_doe',
+      email: '[email protected]',
+      password: 'password123',
+    };
+
+    // TODO: Add test for valid user creation
+
+    test('should reject user with conflicting name', async () => {
+      // Try to create another user with the same name
+      const response = await app.inject({
+        method: 'POST',
+        url: '/api/user',
+        payload: validUser,
+      });
+
+      expect(response.statusCode).toBe(409);
+      expect(response.json()).toMatchObject({
+        error: 'User with this name already exists',
+      });
+    });
+
+    test('should reject invalid name format', async () => {
+      const response = await app.inject({
+        method: 'POST',
+        url: '/api/user',
+        payload: {
+          ...validUser,
+          name: 'invalid@name',
+        },
+      });
+
+      expect(response.statusCode).toBe(400);
+      expect(response.json()).toMatchObject({
+        error: 'Validation Error',
+        details: expect.arrayContaining([
+          expect.objectContaining({
+            message: 'name must contain only letters, numbers, and underscores',
+          }),
+        ]),
+      });
+    });
+
+    test('should reject missing required fields', async () => {
+      const response = await app.inject({
+        method: 'POST',
+        url: '/api/user',
+        payload: {},
+      });
+
+      expect(response.statusCode).toBe(400);
+      expect(response.json()).toMatchObject({
+        error: 'Validation Error',
+        details: expect.arrayContaining([
+          expect.objectContaining({
+            message: 'name is required',
+          }),
+        ]),
+      });
+    });
+  });
+
+  describe('GET /api/user', () => {
+    test('should return list of user names', async () => {
+      const response = await app.inject({
+        method: 'GET',
+        url: '/api/user',
+      });
+
+      expect(response.statusCode).toBe(200);
+      expect(Array.isArray(response.json())).toBe(true);
+    });
+  });
+});

api/test/routes/root.test.ts → api/test/routes/index.test.ts

@@ -1,7 +1,7 @@
 // test/root.test.ts
 import Fastify, { FastifyInstance } from 'fastify';
 import sensible from '@fastify/sensible';
-import rootRoutes from '../../src/routes/root';
+import rootRoutes from '../../src/routes/index';
 
 describe('Root Routes', () => {
   let app: FastifyInstance;