fixing error in creating mock

A public method became protected in phpunit

Tests/CustomFieldTestHelper.php

@@ -30,8 +30,9 @@ use Symfony\Component\DomCrawler\Crawler;
  *
  * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
-class CustomFieldTestHelper
+trait CustomFieldTestHelper
 {
+
     /**
      * Prepare a crawler containing the rendering of a customField
      * 
@@ -44,18 +45,20 @@ class CustomFieldTestHelper
      * @param type $locale
      * @return Crawler
      */
-    public static function getCrawlerForField(CustomField $field, KernelTestCase $testCase, KernelInterface $kernel, $locale = 'en')
+    public function getCrawlerForField(CustomField $field, $locale = 'en')
     {
-        //check a kernel is accessible
-        $customFieldsGroup = $testCase->getMock('Chill\CustomFieldsBundle\Entity\CustomFieldsGroup');
-        $customFieldsGroup->expects($testCase->once())
-            ->method('getActiveCustomFields')
-            ->will($testCase->returnValue(array($field)));
+        $kernel = static::$kernel;
         
-        $request = $testCase->getMock('Symfony\Component\HttpFoundation\Request');
-        $request->expects($testCase->any())
+        //check a kernel is accessible
+        $customFieldsGroup = $this->createMock('Chill\CustomFieldsBundle\Entity\CustomFieldsGroup');
+        $customFieldsGroup->expects($this->once())
+            ->method('getActiveCustomFields')
+            ->will($this->returnValue(array($field)));
+        
+        $request = $this->createMock('Symfony\Component\HttpFoundation\Request');
+        $request->expects($this->any())
             ->method('getLocale')
-            ->will($testCase->returnValue($locale));
+            ->will($this->returnValue($locale));
 
         $kernel->getContainer()->get('request_stack')->push($request);
         
@@ -79,4 +82,4 @@ class CustomFieldTestHelper
         
         return $crawler;
     }
-}
+}