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.

typescript
import { Elysia } from 'elysia'

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

app.fetch(new Request('http://localhost/'))
	.then((res) => res.text())
	.then(console.log)

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

Test ​

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

typescript
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 text = await app.fetch(new Request('http://localhost/'))
			.then(res => res.text())

		expect(text).toBe('Hello World')
	})
})
typescript
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 text = await app.fetch(new Request('http://localhost/'))
			.then(res => res.text())

		expect(text).toBe('Hello World')
	})
})
typescript
import { describe, it, test } from '@jest/globals'

import { Elysia } from 'elysia'

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

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

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

See Unit Test.

Assignment ​

Let's tab the icon in the preview to see how's the request is logged.

Show answer

  • index.ts