Add load method to config

Author: glensc

src/Config.php

@@ -3,6 +3,7 @@
 namespace Xhgui\Profiler;
 
 use ArrayAccess;
+use Xhgui\Profiler\Exception\ProfilerException;
 
 class Config implements ArrayAccess
 {
@@ -25,6 +26,18 @@ public function toArray()
         return $this->config;
     }
 
+    /**
+     * Load a config file, merge with the currently loaded configuration.
+     */
+    public function load($filename)
+    {
+        if (!file_exists($filename)) {
+            throw new ProfilerException("File does not exist: $filename");
+        }
+        $config = require $filename;
+        $this->merge($config);
+    }
+
     private function merge(array $config)
     {
         $this->config = array_replace($this->config, $config);

tests/ConfigTest.php

@@ -12,4 +12,11 @@ public function testDefaults()
         $config = new Config();
         $this->assertEquals(Profiler::SAVER_STACK, $config['save.handler']);
     }
+
+    public function testLoadConfig()
+    {
+        $config = new Config();
+        $config->load(__DIR__ . '/Resources/config_saver.php');
+        $this->assertEquals(Profiler::SAVER_UPLOAD, $config['save.handler']);
+    }
 }

tests/Resources/config_saver.php

@@ -0,0 +1,7 @@
+<?php
+
+use Xhgui\Profiler\Profiler;
+
+return array(
+    'save.handler' => Profiler::SAVER_UPLOAD,
+);