Unit test

Elysia provides a Elysia.fetch function to easily test your application.

Elysia.fetch takes a Web Standard Request, and returns a Response similar to the browser’s fetch API.

import { Elysia } from 'elysia'

const app = new Elysia()
  .get('/', 'Hello World')

const response = await app.fetch(new Request('http://localhost/'))
console.log(await response.text())

This will run a request like an actual request (not simulated).

Test

This allows us to easily test our application without running a server.

import { describe, it, expect } from 'bun:test'

import { Elysia } from 'elysia'

describe('Elysia', () => {
  it('should return Hello World', async () => {
    const app = new Elysia().get('/', 'Hello World')

    const response = await app.fetch(new Request('http://localhost/'))
    const text = await response.text()

    expect(text).toBe('Hello World')
  })
})

import { describe, it, expect } from 'vitest'

import { Elysia } from 'elysia'

describe('Elysia', () => {
  it('should return Hello World', async () => {
    const app = new Elysia().get('/', 'Hello World')

    const response = await app.fetch(new Request('http://localhost/'))
    const text = await response.text()

    expect(text).toBe('Hello World')
  })
})

import { describe, test, expect } from '@jest/globals'

import { Elysia } from 'elysia'

describe('Elysia', () => {
  test('should return Hello World', async () => {
    const app = new Elysia().get('/', 'Hello World')

    const response = await app.fetch(new Request('http://localhost/'))
    const text = await response.text()

    expect(text).toBe('Hello World')
  })
})

See Unit test.

Assignment

Let’s click the icon in the preview to see how’s the request is logged.

One sec, warming things up…