Create-project handler has only a happy-path test

Problem Description

src/createProject.js is the request handler behind POST /projects. It validates the payload and returns a status plus a structured body.

The only test asserts a valid payload returns 201. Every rejection path the handler implements is untested, and last month a validator regression turned a 400 into a 500 without any test noticing.

Output Specification

Add src/createProject.test.js covering the rejection paths this handler implements, so that a rejection returning the wrong status or the wrong error shape fails the suite.

Run npm test before you finish; it must pass.

Leave src/createProject.happy.test.js in place.

Input Files

Extract the following files before beginning.

=============== FILE: package.json =============== { "name": "projects-service", "version": "1.2.0", "private": true, "scripts": { "test": "node --test" } }

=============== FILE: src/createProject.js =============== 'use strict';

const VISIBILITIES = ['private', 'internal', 'public']; const NAME_MAX = 60;

function handleCreateProject(request) { const { headers = {}, body = {} } = request || {};

if (!headers.authorization) { return { status: 401, body: { errors: { auth: 'MISSING_TOKEN' } } }; } if (headers.authorization !== 'Bearer valid-token') { return { status: 401, body: { errors: { auth: 'INVALID_TOKEN' } } }; }

if (typeof body.name !== 'string') { return { status: 400, body: { errors: { name: 'NOT_A_STRING' } } }; } if (body.name.trim() === '') { return { status: 400, body: { errors: { name: 'REQUIRED' } } }; } if (body.name.length > NAME_MAX) { return { status: 400, body: { errors: { name: 'TOO_LONG' } } }; } if (body.visibility !== undefined && !VISIBILITIES.includes(body.visibility)) { return { status: 400, body: { errors: { visibility: 'UNSUPPORTED' } } }; } if (body.ownerId === undefined) { return { status: 400, body: { errors: { ownerId: 'REQUIRED' } } }; }

return { status: 201, body: { id: 'proj_1', name: body.name, visibility: body.visibility || 'private' }, }; }

module.exports = { handleCreateProject, VISIBILITIES, NAME_MAX };

=============== FILE: src/createProject.happy.test.js =============== 'use strict';

const test = require('node:test'); const assert = require('node:assert/strict'); const { handleCreateProject } = require('./createProject');

test('creates a project', () => { const response = handleCreateProject({ headers: { authorization: 'Bearer valid-token' }, body: { name: 'Apollo', ownerId: 'u_1' }, }); assert.equal(response.status, 201); assert.equal(response.body.name, 'Apollo'); });