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Testing ‚Äč

Creating a unit test in Elysia is easy.

You can use bun:test to create a unit test with Elysia.

Elysia instance has a handle method that accepts Request and will return a Response, the same as creating an HTTP request.

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

describe('Elysia', () => {
    it('return a response', async () => {
        const app = new Elysia()
              .get('/', () => 'hi')

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

        expect(response).toBe('hi')
    })
})
import { describe, expect, it } from 'bun:test'

describe('Elysia', () => {
    it('return a response', async () => {
        const app = new Elysia()
              .get('/', () => 'hi')

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

        expect(response).toBe('hi')
    })
})

You can also use other testing library like Jest to create a unit test for Elysia, but we recommended to use bun:test over others.

TIP

When creating a Request to Elysia server, Elysia expect an entire valid URL NOT a part of an URL.

For instance, "http://localhost/" is valid but "/user" is not.