Fix adding an option with label '0'

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Author: ihor-sviziev

app/code/Magento/Eav/Model/Entity/Attribute/OptionManagement.php

@@ -60,7 +60,7 @@ public function add($entityType, $attributeCode, $option)
     {
         $attribute = $this->loadAttribute($entityType, (string)$attributeCode);
 
-        $label = trim((string) $option->getLabel());
+        $label = trim((string)$option->getLabel());
         if ($label === '') {
             throw new InputException(__('The attribute option label is empty. Enter the value and try again.'));
         }
@@ -93,7 +93,7 @@ public function update(
         if (empty($optionId)) {
             throw new InputException(__('The option id is empty. Enter the value and try again.'));
         }
-        $label = trim((string) $option->getLabel());
+        $label = trim((string)$option->getLabel());
         if ($label === '') {
             throw new InputException(__('The attribute option label is empty. Enter the value and try again.'));
         }

app/code/Magento/Eav/Test/Unit/Model/Entity/Attribute/OptionManagementTest.php

@@ -61,9 +61,10 @@ protected function setUp(): void
     /**
      * Test to add attribute option
      *
+     * @param string $label
      * @dataProvider optionLabelDataProvider
      */
-    public function testAdd($label)
+    public function testAdd(string $label): void
     {
         $entityType = 42;
         $storeId = 4;
@@ -232,9 +233,10 @@ public function testAddWithCannotSaveException()
     /**
      * Test to update attribute option
      *
+     * @param string $label
      * @dataProvider optionLabelDataProvider
      */
-    public function testUpdate($label)
+    public function testUpdate(string $label): void
     {
         $entityType = Product::ENTITY;
         $storeId = 4;