MAGETWO-38820: [Add join processors to search service] Tax Module - III

 - Add joinProcessor to Tax/Model/TaxRuleRepository.php
 - updated associated unit test

Author: Cari Spruiell

app/code/Magento/Tax/Model/TaxRuleRepository.php

@@ -52,25 +52,33 @@ class TaxRuleRepository implements TaxRuleRepositoryInterface
      */
     protected $resource;
 
+    /**
+     * @var \Magento\Framework\Api\ExtensionAttribute\JoinProcessorInterface
+     */
+    protected $joinProcessor;
+
     /**
      * @param TaxRuleRegistry $taxRuleRegistry
      * @param TaxRuleSearchResultsInterfaceFactory $searchResultsFactory
      * @param RuleFactory $ruleFactory
      * @param CollectionFactory $collectionFactory
      * @param Resource $resource
+     * @param \Magento\Framework\Api\ExtensionAttribute\JoinProcessorInterface $joinProcessor
      */
     public function __construct(
         TaxRuleRegistry $taxRuleRegistry,
         TaxRuleSearchResultsInterfaceFactory $searchResultsFactory,
         RuleFactory $ruleFactory,
         CollectionFactory $collectionFactory,
-        Resource $resource
+        Resource $resource,
+        \Magento\Framework\Api\ExtensionAttribute\JoinProcessorInterface $joinProcessor
     ) {
         $this->taxRuleRegistry = $taxRuleRegistry;
         $this->taxRuleSearchResultsFactory = $searchResultsFactory;
         $this->taxRuleModelFactory = $ruleFactory;
         $this->collectionFactory = $collectionFactory;
         $this->resource = $resource;
+        $this->joinProcessor = $joinProcessor;
     }
 
     /**
@@ -133,6 +141,7 @@ public function getList(\Magento\Framework\Api\SearchCriteria $searchCriteria)
 
         $fields = [];
         $collection = $this->collectionFactory->create();
+        $this->joinProcessor->process($collection);
 
         //Add filters from root filter group to the collection
         foreach ($searchCriteria->getFilterGroups() as $group) {

app/code/Magento/Tax/Test/Unit/Model/TaxRuleRepositoryTest.php

@@ -46,6 +46,11 @@ class TaxRuleRepositoryTest extends \PHPUnit_Framework_TestCase
      */
     protected $resource;
 
+    /**
+     * @var \PHPUnit_Framework_MockObject_MockObject
+     */
+    protected $extensionAttributesJoinProcessorMock;
+
     /**
      * @var \Magento\Framework\TestFramework\Unit\Helper\ObjectManager
      */
@@ -78,13 +83,21 @@ protected function setUp()
             false
         );
         $this->resource = $this->getMock('\Magento\Tax\Model\Resource\Calculation\Rule', [], [], '', false);
+        $this->extensionAttributesJoinProcessorMock = $this->getMock(
+            '\Magento\Framework\Api\ExtensionAttribute\JoinProcessor',
+            ['process'],
+            [],
+            '',
+            false
+        );
 
         $this->model = new TaxRuleRepository(
             $this->taxRuleRegistry,
             $this->searchResultFactory,
             $this->ruleFactory,
             $this->collectionFactory,
-            $this->resource
+            $this->resource,
+            $this->extensionAttributesJoinProcessorMock
         );
     }
 
@@ -181,6 +194,10 @@ public function testGetList()
         $filterMock = $this->getMock('\Magento\Framework\Api\Filter', [], [], '', false);
         $sortOrderMock = $this->getMock('\Magento\Framework\Api\SortOrder', [], [], '', false);
 
+        $this->extensionAttributesJoinProcessorMock->expects($this->once())
+            ->method('process')
+            ->with($collectionMock);
+
         $this->searchResultsMock->expects($this->once())->method('setSearchCriteria')->with($searchCriteriaMock);
         $this->collectionFactory->expects($this->once())->method('create')->willReturn($collectionMock);
         $searchCriteriaMock->expects($this->once())->method('getFilterGroups')->willReturn([$filterGroupMock]);