Update

Author: KanDisheng

composer.json

@@ -36,12 +36,15 @@
         }
     },
     "require": {
-        "php": ">=5.3.0",
-        "symfony/yaml": "*"
+        "php": ">=5.3.0"
     },
     "require-dev": {
         "CodeMommy/TaskPHP": "*",
-        "phpunit/phpunit": "*"
+        "phpunit/phpunit": "*",
+        "symfony/yaml": "*"
+    },
+    "suggest": {
+        "symfony/yaml": "Required to support YAML file."
     },
     "scripts": {
         "environment": [

source/Config.php

@@ -34,21 +34,44 @@ public function __construct()
     {
     }
 
+    /**
+     * Support File YAML
+     * @return array
+     */
+    private static function supportFileYAML()
+    {
+        if (class_exists('Symfony\\Component\\Yaml\\Yaml')) {
+            return array('yaml', 'yml');
+        }
+        return array();
+    }
+
+    /**
+     * Support File PHP
+     * @return array
+     */
+    private static function supportFilePHP()
+    {
+        return array('php');
+    }
+
     /**
      * Parse File
      * @param string $filePath
      * @return mixed
      */
     private static function parseFile($filePath = '')
     {
-        $supportFileType = array('php', 'yaml', 'yml');
+        $supportFileType = array();
+        $supportFileType = array_merge($supportFileType, self::supportFilePHP());
+        $supportFileType = array_merge($supportFileType, self::supportFileYAML());
         foreach ($supportFileType as $value) {
             $file = sprintf('%s.%s', $filePath, $value);
             if (is_file($file)) {
-                if ($value == 'php') {
+                if (in_array($value, self::supportFilePHP())) {
                     return require($file);
                 }
-                if ($value == 'yaml' || $value == 'yml') {
+                if (in_array($value, self::supportFileYAML())) {
                     return Yaml::parse(file_get_contents($file));
                 }
             }

test/ConfigTest.php

@@ -38,7 +38,7 @@ public function __construct()
     public function testConstruct()
     {
         new Config();
-        $this->assertEquals(true, true);
+        $this->assertTrue(true);
     }
 
     /**