Gain insights into testing Next.js applications with Cypress. Delve into organizing, fetching data, and writing end-to-end tests to enhance web reliability and quality.

Testing Next.js Applications with Cypress-03.png

project.tar.gz

Migrate, build and start

Build and start

Build and test

Migrate, build and test

Migrate, build and test components

Gain real-world knowledge for making Next.js websites more reliable through smart testing. You will start this course by understanding the basics of Next.js and how files are organized, and data is fetched. Then, you will explore Cypress, a tool that helps you test your website to ensure everything works as expected.

In this course, you will learn the ins and outs of Cypress by selecting elements and making assertions. Next, you will learn how to test a real-world Next.js application and get hands-on experience writing end-to-end and component tests from scratch.

By the end of this course, you will have the required skills to set up a comprehensible Cypress test suit that can test any web application. Whether you are a seasoned Next.js developer or just getting started, this course empowers you to elevate your testing game, contributing to the overall quality and reliability of your Next.js applications.

Testing Next.js Applications with Cypress

# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.

# dependencies
/node_modules
/.pnp
.pnp.js

# testing
/coverage

# next.js
/.next/
/out/

# production
/build

# misc
.DS_Store
*.pem

# debug
npm-debug.log*
yarn-debug.log*
yarn-error.log*
.pnpm-debug.log*

# local env files
.env*.local

# vercel
.vercel

# typescript
*.tsbuildinfo

# Prisma
*.db
*.db-journal

FROM cypress/base:16

RUN mkdir nextjs-cypress-demo

COPY package.json yarn.lock /nextjs-cypress-demo/

WORKDIR nextjs-cypress-demo

RUN yarn install

# Testing Next.js Application with Cypress

## Building a Docker Tarball

```sh
tar -czpf project.tar.gz Dockerfile package.json yarn.lock
```


import { prisma } from "./src/prisma";
import { defineConfig } from "cypress";
import type { Event } from "@prisma/client";
import shell from "shell-exec";

export const seedEvents = async (events: Event[]): Promise<null> => {
  await Promise.all(
    events.map(async (event) => {
      await prisma.event.create({ data: event });
    })
  );
  return null;
};

const resetDatabase = async () => {
  await shell("yarn prisma migrate reset -f");
  return null;
};

export default defineConfig({
  e2e: {
    baseUrl: "http://0.0.0.0:3000",
    supportFile: false,
    setupNodeEvents(on) {
      on("task", {
        "seed:events": seedEvents,
        reset: resetDatabase,
      });
    },
  },
  component: {
    devServer: {
      framework: "next",
      bundler: "webpack",
    },
  },
  screenshotOnRunFailure: false,
  video: false,
});


/// <reference types="next" />
/// <reference types="next/image-types/global" />

// NOTE: This file should not be edited
// see https://nextjs.org/docs/basic-features/typescript for more information.


/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  swcMinify: true,
}

module.exports = nextConfig


module.exports = {
  plugins: {
    tailwindcss: {},
    autoprefixer: {},
  },
}


/** @type {import('tailwindcss').Config} */
module.exports = {
  content: ["./pages/**/*.{js,ts,jsx,tsx}", "./src/**/*.{js,ts,jsx,tsx}"],
  theme: {
    extend: {
      fontFamily: {
        sans: ["Inter", "sans-serif"],
      },
    },
  },
  plugins: [],
};


Introduction to Next.js and Testing

Introduction to Cypress

Testing a Next.js Application

End-To-End Testing with Cypress

Component Testing with Cypress

Assessment: Testing Next.js Applications with Cypress

Conclusion

Solution: Cypress Spies