Unit testing with Behat

Behat is a BDD framework for testing your code with human-readable sentences that describes code behavior in various use cases.

Getting ready

Create an empty directory for a new project.

How to do it…

In this recipe, we will create a demonstration shopping cart extension with Behat tests.

Preparing extension structure

1. First, create a directory structure for your extension:

   book
   └── cart
       ├── src
       └── features

2. To work with the extension as a Composer package, prepare the book/cart/composer.json file as follows:

   {
       "name": "book/cart",
       "type": "yii2-extension",
       "require": {
           "yiisoft/yii2": "~2.0"
       },
       "require-dev": {
           "phpunit/phpunit": "4.*",
           "behat/behat": "^3.1"
       },
       "autoload": {
           "psr-4": {
               "book\\cart\\": "src/",
               "book\\cart\\features\\": "features/"
           }
       },
       "extra": {
           "asset-installer-paths": {
               "npm-asset-library": "vendor/npm",
               "bower-asset...