Test file and update README

README.md

@@ -13,5 +13,16 @@ composer require jrosset/envreader
 ```php
 <?php
 
+use jrosset\EnvReader\BaseEnv;
 
+class Env extends BaseEnv {
+    protected const PATH_ENV = __DIR__ . '/.env';
+
+    protected function initProperties (): array {
+        return [
+            'WEBSITE_MODE' => 'DEV',
+            'WEBSITE_NAME' => 'Generic site'
+        ];
+    }
+}
 ```

tests/.env

@@ -0,0 +1,5 @@
+WEBSITE_NAME=Foo
+
+DB_NAME=Bar
+DB_LOGIN=Bar
+DB_PASS=*****

tests/test.php

@@ -0,0 +1,23 @@
+<?php
+/** @noinspection PhpIllegalPsrClassPathInspection */
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use jrosset\EnvReader\BaseEnv;
+
+class Env extends BaseEnv {
+    /**
+     * @inheritdoc
+     */
+    protected const PATH_ENV = __DIR__ . '/.env';
+
+    protected function initProperties (): array {
+        return [
+            'WEBSITE_MODE' => 'DEV',
+            'WEBSITE_NAME' => 'Generic site',
+        ];
+    }
+}
+
+var_dump(Env::getInstance()->getProperties());
+var_dump(Env::getInstance()->getProperty('db_host', 'localhost'));