[Forwardport] [FIX] Simplify ternary operators for catalog module

app/code/Magento/Catalog/Model/Api/SearchCriteria/CollectionProcessor/FilterProcessor/ProductCategoryFilter.php

@@ -21,7 +21,7 @@ class ProductCategoryFilter implements CustomFilterInterface
      */
     public function apply(Filter $filter, AbstractDb $collection)
     {
-        $conditionType = $filter->getConditionType() ? $filter->getConditionType() : 'eq';
+        $conditionType = $filter->getConditionType() ?: 'eq';
         $categoryFilter = [$conditionType => [$filter->getValue()]];
 
         /** @var Collection $collection */

app/code/Magento/Catalog/Model/CategoryRepository.php

@@ -129,7 +129,7 @@ public function save(\Magento\Catalog\Api\Data\CategoryInterface $category)
      */
     public function get($categoryId, $storeId = null)
     {
-        $cacheKey = null !== $storeId ? $storeId : 'all';
+        $cacheKey = $storeId ?? 'all';
         if (!isset($this->instances[$categoryId][$cacheKey])) {
             /** @var Category $category */
             $category = $this->categoryFactory->create();

app/code/Magento/Catalog/Model/Product.php

@@ -2006,7 +2006,7 @@ public function getIsVirtual()
      */
     public function addCustomOption($code, $value, $product = null)
     {
-        $product = $product ? $product : $this;
+        $product = $product ?: $this;
         $option = $this->_itemOptionFactory->create()->addData(
             ['product_id' => $product->getId(), 'product' => $product, 'code' => $code, 'value' => $value]
         );

app/code/Magento/Catalog/Model/Product/Option/Type/File.php

@@ -127,7 +127,7 @@ public function __construct(
         $this->mediaDirectory = $this->filesystem->getDirectoryWrite(DirectoryList::MEDIA);
         $this->validatorInfo = $validatorInfo;
         $this->validatorFile = $validatorFile;
-        $this->serializer = $serializer ? $serializer : ObjectManager::getInstance()->get(Json::class);
+        $this->serializer = $serializer ?: ObjectManager::getInstance()->get(Json::class);
         parent::__construct($checkoutSession, $scopeConfig, $data);
     }
 

app/code/Magento/Catalog/Model/Product/ProductList/Toolbar.php

@@ -102,6 +102,6 @@ public function getLimit()
     public function getCurrentPage()
     {
         $page = (int) $this->request->getParam(self::PAGE_PARM_NAME);
-        return $page ? $page : 1;
+        return $page ?: 1;
     }
 }

app/code/Magento/Catalog/Model/Product/Type/Price.php

@@ -341,7 +341,7 @@ public function getTierPrice($qty, $product)
             }
         }
 
-        return $prices ? $prices : [];
+        return $prices ?: [];
     }
 
     /**

app/code/Magento/Catalog/Model/ProductRepository.php

@@ -740,7 +740,7 @@ protected function addFilterGroupToCollection(
         $fields = [];
         $categoryFilter = [];
         foreach ($filterGroup->getFilters() as $filter) {
-            $conditionType = $filter->getConditionType() ? $filter->getConditionType() : 'eq';
+            $conditionType = $filter->getConditionType() ?: 'eq';
 
             if ($filter->getField() == 'category_id') {
                 $categoryFilter[$conditionType][] = $filter->getValue();

app/code/Magento/Catalog/Test/Unit/Model/Api/SearchCriteria/CollectionProcessor/FilterProcessor/ProductCategoryFilterTest.php

@@ -31,7 +31,7 @@ public function testApply()
             ->disableOriginalConstructor()
             ->getMock();
 
-        $filterMock->expects($this->exactly(2))
+        $filterMock->expects($this->exactly(1))
             ->method('getConditionType')
             ->willReturn('condition');
         $filterMock->expects($this->once())