Node.js Application Test করা

// math.test.js
import { test } from 'node:test'
import assert from 'node:assert'

function add(a, b) {
  return a + b
}

test('add() sums two numbers', () => {
  assert.strictEqual(add(2, 3), 5)
})

node --test
# ✔ add() sums two numbers

import { describe, test } from 'node:test'
import assert from 'node:assert'

describe('add()', () => {
  test('sums two positive numbers', () => {
    assert.strictEqual(add(2, 3), 5)
  })

  test('handles negative numbers', () => {
    assert.strictEqual(add(-2, 3), 1)
  })
})

test('fetches a user', async () => {
  const user = await getUser(1)
  assert.strictEqual(user.name, 'Sam')
})

import { test } from 'node:test'
import assert from 'node:assert'
import request from 'supertest'
import app from './app.js'

test('GET /products returns a list', async () => {
  const response = await request(app).get('/products')
  assert.strictEqual(response.status, 200)
  assert.ok(Array.isArray(response.body))
})