Implementation of database drivers (recreated)

README.md

@@ -41,7 +41,7 @@ Zebra\_Mptt uses [table locks](http://dev.mysql.com/doc/refman/5.0/en/lock-table
 
 ## Requirements
 
-PHP 5.0.0+, MySQL 4.1.22+
+PHP 5.0.0+, MySQL 4.1.22+, mysqli extension or PDO extension
 
 ## Installation
 
@@ -61,6 +61,12 @@ Or you can install it manually by downloading the latest version, unpacking it,
 require_once 'path/to/Zebra_Mptt.php';
 ```
 
+or
+
+```php
+use Zebra\Mptt\Mptt;
+``` 
+
 ## Install MySQL table
 
 Notice a directory called *install* containing a file named *mptt.sql*. This file contains the SQL code that will create the table used by the class to store its data. Import or execute the SQL code using your preferred MySQL manager (like phpMyAdmin or the fantastic Adminer) into a database of your choice.
@@ -72,7 +78,7 @@ Notice a directory called *install* containing a file named *mptt.sql*. This fil
 require 'path/to/Zebra_Mptt.php';
 
 // instantiate a new object
-$mptt = new Zebra_Mptt();
+$mptt = new Zebra_Mptt($mysqlLink);
 
 // populate the table
 
@@ -106,3 +112,22 @@ $mptt->get_tree();
 ```
 
 :books: Check out the [awesome documentation](https://stefangabos.github.io/Zebra_Mptt/Zebra_Mptt/Zebra_Mptt.html)!
+
+
+# Testing
+
+Tests requires >= php 7.2.
+
+Step 1. Clone this repository
+```bash
+git clone [email protected]:stefangabos/Zebra_Mptt.git
+cd Zebra_Mptt
+```
+Step 2. Install dependencies
+```bash
+composer install
+```
+Step 3. Run tests (phpunit, see composer.json scripts)
+```bash
+composer test
+```