Add config test and readme doc

README.md

@@ -184,6 +184,7 @@ liip_imagine:
             cache:                ~
             data_loader:          ~
             controller_action:    ~
+            route:                []
             filters:
 
                 # Prototype
@@ -250,6 +251,10 @@ Each filter set that you specify has the following options:
  - `cache` - override the default cache setting
  - `data_loader` - override the default data loader
  - `controller_action` - override the default controller action
+ - `route` - optional list of route requirements, defaults and options using in the route loader. Add array width keys 'requirements', 'defaults' or 'options'. 
+
+    default: empty array
+
  - `format` - hardcodes the output format (aka the requested format is ignored)
 
 ## Built-in Filters

Tests/DependencyInjection/LiipImagineExtensionTest.php

@@ -69,7 +69,18 @@ public function testCacheClearerIsNotRegistered()
 
         $this->assertFalse($this->containerBuilder->hasDefinition('liip_imagine.cache.clearer'));
     }
-
+
+    public function testCustomRouteRequirements()
+    {
+        $this->createFullConfiguration();
+        $param = $this->containerBuilder->getParameter('liip_imagine.filter_sets');
+
+        $this->assertTrue(isset($param['small']['filters']['route']['requirements']));
+
+        $variable1 = $param['small']['filters']['route']['requirements']['variable1'];
+        $this->assertEquals('value1', $variable1, sprintf('%s parameter is correct', $variable1));
+    }
+
     /**
      * @return ContainerBuilder
      */
@@ -80,7 +91,7 @@ protected function createEmptyConfiguration()
         $loader->load(array(array()), $this->containerBuilder);
         $this->assertTrue($this->containerBuilder instanceof ContainerBuilder);
     }
-
+    
     /**
      * @return ContainerBuilder
      */
@@ -105,6 +116,8 @@ protected function getFullConfig()
     small:
         filters:
             thumbnail: { size: [100, ~], mode: inset }
+            route:
+                requirements: { variable1: 'value1' }
         quality: 80
     medium_small_cropped:
         filters: