The testing pyramid applied to a backend service.
01
01
Understand the problem
nodejstestingintegratione2e
02
02
Attempt it yourself
Sketch your approach before reading the solution — that's what interviews test.
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03
03
Study the solution
The solution is waiting
Give it an honest attempt first — then compare your thinking with the full walkthrough.
04
04
Read the code
Integration test of a route with supertest
import request from 'supertest';
import { test } from 'node:test';
import assert from 'node:assert/strict';
import { app } from '../app.js'; // real app + test DB
test('POST /users creates a user', async () => {
const res = await request(app).post('/users').send({ email: 'a@b.com' });
assert.equal(res.status, 201);
assert.ok(res.body.id);
});05
05
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