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Learning Yii Testing
Learning Yii Testing

Learning Yii Testing: Embrace 360-degree testing on your Yii 2 projects using Codeception

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Learning Yii Testing

Chapter 2. Tooling up for Testing

In this chapter, we're going to have an overview of Yii 2, what has changed since the last version, with which you might have become comfortable its new directory structure and organization, as well as its new features and niceties.

We cannot introduce Yii 2 without looking at Composer, a new way to organize and extend your projects in PHP.

Once we have had a look at all the basic tools we're going to use, let's review our plan and consider what we will be working on in the rest of this book: user authentication REST interface and user login from a modal window.

In order to start working on our features, we need to step aside and review our plan from a project management and quality assurance point of view, that is, introduce the master test plan. In other words, we need to consider what we are going to test and how much before undertaking the actual implementation work.

We will be working through the following steps:

  • Downloading and...

Downloading and installing Yii 2

If you've worked with Yii in the past, be prepared. The new version of Yii 2 can be considered as a brand new framework, modern and robust.

Yii 2 takes a long-awaited step forward in the right direction. It is the result of several years of work, done collaboratively on the Internet, mostly on GitHub (https://github.com/yiisoft/yii2), by developers from different parts of the world.

As a user of Yii, you can collaborate too, by simply filing bug reports, feature requests at https://github.com/yiisoft/yii2/issues, polishing off the documentation and translations, and creating new extensions and features for review and inclusion on the project. There are also many other non-officially supported subprojects that can benefit from your support: some already there for you to use, and some that you may have written yourself.

Environment and workflow

As a developer, you will have your own environment with which you need to feel confident enough, and which can actually help you writing the code without many worries. If you do feel that there's a gap between writing the code and seeing the actual result, then there's something you need to fix.

It's quite important for the purpose of this book to outline my optimal environment that I will use throughout the upcoming chapters and code samples that you will find.

I will, of course, note when the environment might make a difference, but be wary that, if your environment is different, you may need to check the developer's documentation or reach out to anyone who might know the answer, in case something is not working.

My personal development environment is composed of the following:

  • A robust Integrated Development Environment (IDE), such as IntelliJ PHPStorm, rather than a simple code editor (for example, VIM): You get some additional benefits from...

Introducing Composer

As you might well know, Yii 1 was (initially) shipped as a standalone library that needed installation on the target environment, and from there you could use its CLI interface to create your web app. After that, the library would be sitting somewhere in your filesystem to be directly called by the web app upon loading it.

When Yii started, this was common practice; there wasn't a way to keep the code self-contained and you could easily get into several problems whenever you needed to ship the code to shared hosting environments (I'm looking at you Plesk/OpenBaseDir restriction).

Secondly, system-wide packages and dependencies were often restricting the developers to embrace new features and work around existing bugs, without even counting that these were (too) often overlooked. If you've been working on the web with PHP for quite a while, I'm pretty sure you've experienced the sense of lagging behind other big frameworks on the development scene...

Finding your way around Yii 2

Now you should have everything you need installed on your box, so let's start looking around and see how Yii 2 is organized so that we will know where to put our hands when needed.

Remember, there's always a README.md file you can consult: in the advanced application, it will show you the structure and use of the various directories.

By just listing the content of the root of the project, you will immediately spot a big difference:

$ tree -L 1 -d
.
├── assets
├── commands
├── config
├── controllers
├── mail
├── models
├── runtime
├── tests
├── vendor
├── views
└── web

11 directories

I've willingly excluded the files from the output of tree and displayed only the directories.

It seems like all the content of what once was...

Structure of the default web application

The basic application is composed of a SiteController with a couple of modules and a login system.

The configuration files should be quite straightforward to understand and can be found in the /config directory. We will be touching on them every now and then in order to configure certain aspects and extensions we're going to use.

Regardless of whether you are using the manually installed basic application or the Composer-driven method explained earlier, you will be required to set up the database on your environment and configure the application.

In the configuration file web.php, be sure to have set up the cookieValidationKey, and while in db.php, set up the DSN of your database as described in the documentation at http://www.yiiframework.com/doc-2.0/guide-start-databases.html#configuring-a-db-connection.

You will also note the following at the end of the web.php file:

// config/web.php

if (YII_ENV_DEV) {
    // configuration adjustments for &apos...

Downloading and installing Yii 2


If you've worked with Yii in the past, be prepared. The new version of Yii 2 can be considered as a brand new framework, modern and robust.

Yii 2 takes a long-awaited step forward in the right direction. It is the result of several years of work, done collaboratively on the Internet, mostly on GitHub (https://github.com/yiisoft/yii2), by developers from different parts of the world.

As a user of Yii, you can collaborate too, by simply filing bug reports, feature requests at https://github.com/yiisoft/yii2/issues, polishing off the documentation and translations, and creating new extensions and features for review and inclusion on the project. There are also many other non-officially supported subprojects that can benefit from your support: some already there for you to use, and some that you may have written yourself.

Environment and workflow


As a developer, you will have your own environment with which you need to feel confident enough, and which can actually help you writing the code without many worries. If you do feel that there's a gap between writing the code and seeing the actual result, then there's something you need to fix.

It's quite important for the purpose of this book to outline my optimal environment that I will use throughout the upcoming chapters and code samples that you will find.

I will, of course, note when the environment might make a difference, but be wary that, if your environment is different, you may need to check the developer's documentation or reach out to anyone who might know the answer, in case something is not working.

My personal development environment is composed of the following:

  • A robust Integrated Development Environment (IDE), such as IntelliJ PHPStorm, rather than a simple code editor (for example, VIM): You get some additional benefits from it, for example, an...

Introducing Composer


As you might well know, Yii 1 was (initially) shipped as a standalone library that needed installation on the target environment, and from there you could use its CLI interface to create your web app. After that, the library would be sitting somewhere in your filesystem to be directly called by the web app upon loading it.

When Yii started, this was common practice; there wasn't a way to keep the code self-contained and you could easily get into several problems whenever you needed to ship the code to shared hosting environments (I'm looking at you Plesk/OpenBaseDir restriction).

Secondly, system-wide packages and dependencies were often restricting the developers to embrace new features and work around existing bugs, without even counting that these were (too) often overlooked. If you've been working on the web with PHP for quite a while, I'm pretty sure you've experienced the sense of lagging behind other big frameworks on the development scene (and not just in PHP-land...

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Description

Developers who have a solid pre-existing knowledge of Yii's core concepts will find this book an ideal introduction to learning to write tests using Yii 2's tools. You'll learn to create faster and more reliable applications with less time and effort.
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Table of Contents

10 Chapters
1. The Testing Mindset Chevron down icon Chevron up icon
2. Tooling up for Testing Chevron down icon Chevron up icon
3. Entering Codeception Chevron down icon Chevron up icon
4. Isolated Component Testing with PHPUnit Chevron down icon Chevron up icon
5. Summoning the Test Doubles Chevron down icon Chevron up icon
6. Testing the API – PHPBrowser to the Rescue Chevron down icon Chevron up icon
7. Having Fun Doing Browser Testing Chevron down icon Chevron up icon
8. Analyzing Testing Information Chevron down icon Chevron up icon
9. Eliminating Stress with the Help of Automation Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
(1 Ratings)
5 star 0%
4 star 100%
3 star 0%
2 star 0%
1 star 0%
J. M. De Moor Aug 09, 2015
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
This is a good introduction to testing a Yii2 project. A lot is covered in 199 pages (including index), but if you if you follow the sample through, tutorial-style from front to back, you should have a pretty good foundation for incorporating testing with Codeception into your Yii2 development projects.Although this book starts from the beginning with testing by discussing premise, motivation and concepts, it does expect the reader to have a "knowledge of Yii's core concepts" coming in...as well as some other web concepts in general. For example, chapter 6 covers functional tests using a RESTful API service. I found this chapter extremely challenging -- partly because I did not use the standard Yii project template as a starting point and had to modify some settings along the way, and partly because I am a REST novice -- but I finally did get all the tests to work.There are a few editing errors (typos?) that are typical of a first edition, and at times the writing style was difficult for me to follow. So I took a star away. But I am very happy to see this subject handled as a separate volume, and absolutely recommend this book for Yii2 developers who want to get up to speed on testing.
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