better tests

tests/ConfigTest.php

@@ -32,17 +32,26 @@ class ConfigTest extends PHPUnit_Framework_TestCase
         $this->assertNotEquals('Config', get_class(Config::getInstance()));
     }
     
+    /**
+     * @expectedException Exception
+     */
     public function testArrayAsParam()
     {
         $arr = array(
                 'one' => 1,
                 'two' => 2, 
-                'three' => 3
+                'three' => 3,
+                4           => 'four'
                 );
         
         Config::set(0, $arr);
         $new_arr = Config::get(0);
         $this->assertEquals('ConfigArray', get_class($new_arr));
+        $this->assertEquals('four', $new_arr->offsetGet(4));
+        $this->assertEquals(1, $new_arr->offsetGet('one'));
+        $this->assertNotEquals(1, $new_arr->offsetGet('two'));    
+        
+        $new_arr->offsetGet(24);
     }
     
 }