code-api-web/src/packages/fastify-integration-tests/index.ts

import { FastifyInstance, InjectOptions, LightMyRequestResponse } from 'fastify'

export type MockResponse = LightMyRequestResponse

export type MockResponseThunk = () => Promise<MockResponse>

export type MockClient = (opts: InjectOptions) => Promise<MockResponse>

export const makeJsonRequestClient = (server: FastifyInstance): MockClient => (opts) => {
	const inject = {
		...opts,
		headers: {
			...(opts.headers ?? {}),
			'accept': 'applicaton/json',
		} as Record<string, string>,
	}
	if (opts.payload) {
		inject.headers['content-type'] = 'application/json'
		inject.payload = JSON.stringify(opts.payload)
	}

	return server.inject(inject)
}