MNT Add method getResponse to mock controller (#304)

* MNT Add method getResponse to mock controller

* Fix spelling issue in behat test

tests/behat/features/ckan.feature

@@ -24,8 +24,8 @@ Feature: Use CKAN
     When I click the "Data" CMS tab
     When I fill in "DataResource-uri" with "https://catalogue.data.govt.nz/dataset/directory-of-educational-institutions"
     And I wait for 5 seconds
-    And I should see "Early Childhood Services (ECE) Directory"
-    When I select "New Zealand Schools" from the ".ckan-resource-locator__resource-select select" field
+    And I should see "Early Childhood Services (ECEs) Directory"
+    When I select "Schools Directory" from the ".ckan-resource-locator__resource-select select" field
     And I wait for 5 seconds
     And I press the "Save" button
     Then I should see a "Saved" success toast
@@ -36,10 +36,10 @@ Feature: Use CKAN
     And I check "Form_DataColumns_GridFieldEditableColumns_4_ShowInResultsView"
     And I press the "Save" button
     And I go to "/my-ckan-registry-page?stage=Stage"
-    Then I should see "School id"
+    Then I should see "Ece id"
     And I should see "Org name"
     And I should see "Telephone"
     And I should see "Search"
     When I click on the ".griddle-table-heading-cell:nth-of-type(2)" element
     And I wait for 2 seconds
-    Then I should see "Albury School"
+    Then I should see "ABC Educare"

tests/php/Forms/GridField/GridFieldDetailForm/ResourceFieldItemRequestTest.php

@@ -11,6 +11,7 @@
 use SilverStripe\CKANRegistry\Service\ResourcePopulatorInterface;
 use SilverStripe\Control\Controller;
 use SilverStripe\Control\HTTPRequest;
+use SilverStripe\Control\HTTPResponse;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Dev\SapphireTest;
 use SilverStripe\Forms\Form;
@@ -123,6 +124,7 @@ protected function moveFieldFixture($fixture, $newPosition)
         $controllerMock = $this->createMock(Controller::class);
         $controllerMock->method('Link')->willReturn('test');
         $controllerMock->method('getRequest')->willReturn($request);
+        $controllerMock->method('getResponse')->willReturn(new HTTPResponse('test'));
 
         // Create an item request
         $itemRequest = new ResourceFieldItemRequest(