How can I write unit tests for app router? Specifically addressing the creation of NextRequest

[buoyant minnow]

Hi @tight canyon. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

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To create a NextRequest object, you can use the NextRequest class from the next/server package. However, the NextRequest object is typically provided to you by the framework when you define a handler function for an API route or middleware.

Here's an example of a handler function for an API route that receives a NextRequest object:

import type { NextRequest } from 'next/server';

export default async function handler(req: NextRequest) {
  const { searchParams } = new URL(req.url);
  const email = searchParams.get('email');
  return new Response(email);
}

Source: Edge API Routes - Query Parameters (https://nextjs.org/docs/api-routes/edge-api-routes)

And here's an example of a middleware function that receives a NextRequest object:

import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export function middleware(request: NextRequest) {
  // Your middleware logic here
}

Source: Middleware - Using Cookies - Part 1 (https://nextjs.org/docs/pages/building-your-application/routing/middleware)

In both cases, the NextRequest object is provided by the Next.js framework, and you don't need to create it manually. If you want to test the functionality of your API route or middleware, you can use tools like Postman (https://www.postman.com/) or Insomnia (https://insomnia.rest/) to send HTTP requests to your API endpoints.

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