Introduction to the Building Angular applications with NX

Speaker introduction and course overview

What is NX?

Difference between Repository and Monorepo

Repository vs Monorepo

Angular and NX - Why?

Advantages of NX

Disadvantages of NX

First module summary

Introduction

Second module introduction

Short lesson about NX installation methods

NX installation

A quick overview of the default suggested directory structure of NX repository.

NX repository folder layout

Second module summary

How to install NX

How to build a simple application and how to create libraries in NX

Third module introduction

Adding the first app

Adding the first library

Code session for the first application and library in NX.

Time tracker code

Third module summary

The first NX Angular application

What else you can keep in monorepo...? Multiple apps using multiple frameworks, built-in Storybook and Cypress configuration

Fourth module introduction

How can you add more apps to monorepo, which frameworks are available at the time, and advantages of keeping them together

Built-in app types in NX

What are buildable and publishable libraries

Built-in library types in NX

Storybook

End-to-end testing

Fourth module summary

More built-in NX features

This module will present a real-life example of an NX mono repository with multiple libraries and three applications.

Fifth module introduction

Presenting the current module's plan, highlighting crucial backend details for the frontend to illustrate the problem domain.

Backend overview

How to migrate simple existing applications to NX

Migrating backend app to NX

How to extract library with DTOs classes from backend app and prepare it to be shared with frontend application

Extracting shared DTO library

Let's look at how our final application should look like

Design overview

Add new Angular apps to the existing NX repository

Adding new Angular apps to existing monorepo

Adding Storybook to monorepo - different approach

Using previously configured Storybook in this lesson we will create and prepare a few common components that later we’ll use in apps.

Adding common components. Card, Button, Input, List, ListItem

Adding a domain library for RoomList, RoomBackground and RoomTimelineList that I missed in previous lessons

Constructing the services of the application

Constructing the application - Services

Constructing the Admin application

Constructing the Room application

How to prepare the application to work offline

Preparing the Room applications to work offline

Summary of building a real-life application with NX

Lessons learned and homework

Building a real life application with NX

Sixth module introduction

What is the dependency graph in NX, and how does it help you with developer experience

Dependency graph - what is it?

Why it’s important to keep the dependencies organized

Importance of keeping dependencies in order

How to run unit tests and lint only on the affected parts of the dependency graph

Affected

How to deal with the most common examples of circular dependencies

Dealing with circular dependencies

Sixth module summary

Dependency graph

Seventh module introduction

How to automatically migrate simple applications to the NX mono repository

Automatic migration of existing applications

How to manually migrate complex applications to the NX mono repository

Manual migration of existing applications

What may be the problem during migration of big, stale existing codebases

Analysis of potential problems in migration of big existing codebases

Tips. The migration plan

Why defining a target architecture may be an important step of the migration process

Tips. Target architecture

Seventh module summary

Migrating existing applications to NX

What you have learned from this course

Contact info and final words from the author

Final words

Summary

### Challenges and solutions in building large Angular apps

In large Angular applications, developers face several significant challenges. One major issue is managing complexity. These apps have lots of components, services, and modules that all need to work together smoothly. Keeping everything organized and easy to understand can be tough, especially with a big team.

Another problem is build times. As the app grows, it can take longer and longer for changes to show up during development. This can slow down the development process and make it harder to stay productive.

Dependency management is another headache. This involves making sure all the different parts of the app work well together and play nicely with outside libraries. 

### Tool limitations

Even experienced teams can struggle with managing large Angular applications without using the right tools. Organizing numerous components, services, and modules becomes challenging without tools that aid in clarity and team collaboration. Utilizing appropriate tools is key for experienced teams to successfully navigate the complexities of large Angular projects.

### Fixing problems with NX

NX offers several benefits for managing large Angular applications. It helps reduce the time it takes to build projects and keeps code well-organized by managing dependencies and structuring code into reusable parts. This makes it easier to maintain and expand applications over time.

One of NX's strengths is its ability to speed up builds. It does this by remembering previous build results and doing multiple tasks at the same time. This saves developers time and lets them make changes quickly.

NX also comes with tools for testing and checking code quality. It works well with common testing tools and helps keep code clean and consistent. This catches mistakes early and ensures code stays high-quality.

Furthermore, NX makes it easy to work together on projects. It keeps all code and shared parts in one place, making it simpler to share code between different projects or teams. This improves teamwork, reduces problems with combining code, and makes development smoother overall.

Comprehensive guide to Angular and NX: Build, migrate, and decompose your Applications

Learn how to create and maintain Angular applications using NX. 
Designed for Angular developers, this course covers best practices, improving workflow, and migrating existing applications to NX. 
Discover how to configure tools like Cypress for end-to-end testing and Storybook for UI component development. 
By the end of this course, you will have the knowledge and experience to work comfortably with NX on a daily basis.

Building Angular applications with NX

Build a simple time tracker application using NX monorepo.

Create a real-life NX monorepo with three applications. The main goal of these applications is to display the schedule for conference rooms on screens mounted to the doors of the respective rooms.

Build an admin panel as one of the applications to manage the schedule data for the conference rooms.

Use NX graph feature to visualize application architecture.

What is a monorepo approach and how it might help you

Differences between Angular CLI projects and NX projects

How to create Angular applications using NX

How to add Cypress and Storybook to your NX monorepo

How to migrate existing Angular applications to NX monorepo

What is a dependency graph and how to use it to save your time

How to prepare migration even for big and complicated projects

The last part of the NX feature overview is end-to-end testing of Angular applications with Cypress.

There is no simpler thing to do as Cypress installation in NX mono repository. There's nothing to do. Cypress will be generated for you by default as an additional application.

---
title: End-to-end testing
description: End-to-end testing with NX 
code: https://gitlab.com/fullstackio/books/newline-course-apps/building-angular-applications-with-nx-app/-/tree/main/manuscript/code/03.05-e2e?ref_type=heads
privateVideoUrl: https://stream.mux.com/8P1bYMqNtRZMOyb02AjegZ02jcKhY447CzyBZr02jhc5E00.m3u8
---

The last part of the NX feature overview is end-to-end testing of Angular applications with Cypress.

## Installation...?

There is no simpler thing to do as Cypress installation in NX mono repository. There's nothing to do. Cypress will be generated for you by default as an additional application.

![Apps structure](https://d2uusema5elisf.cloudfront.net/courses/building-angular-applications-with-nx/module_04/lesson_04.05/public/images/03-05-01.png)

## First end-to-end test

galczo5

Let's explore how to create end-to-end tests in Nx.

So you don't need to install end-to-end framework additionally.

When you create a new monorepo with Angular app or you add a new Angular app to

the interactive wizard will ask you about your favorite test runner for end-to-

And as you can see, I'm going to choose Cypress.

Once everything is installed, you should have your application here and

e-to-e project to put your end-to-end tests inside.

And as you can see, we have our Cypress config here.

And we have everything necessary to start writing our code.

And we have our first example app, CI/TS.

And again, I will try to test our NxWelcome component.

So let's create a new file, NxWelcome.cy.ts.

Inside of this file, we will create a describe function here.

And then we need to set the title of this test.

And the first case, let's check if it works.

I will put the rest of the code and then we will go through it.

First of all, we need to call visit to go to our web page that is hosted under

Then Cypress get app and xWelcome, which is basically the selector of our

And then we have some assertions like it exists, should be visible, should

You need to execute comment yarn, Nx, e-to-e.

And then the name of the project that contains N to end tests.

So my application is called angular e-to-e monorepo.

And I need to add this e-to-e and just to point the project that contains my

But as you can see, running N2N tests is very simple.

So you can have a modern technology stack.

You can have storybook, you can have Cypress or playwright or whatever you want

You don't need to spend your time figuring out what is not working, why it's

And you can focus on important parts that are features, business needs and the