MTO-134: [Variation] Add Simple Product with required Custom Options to Cart

- Defects fixed

Author: vitalysery

dev/tests/functional/tests/app/Magento/Catalog/Test/Block/Product/View/CustomOptions.php

@@ -193,7 +193,7 @@ protected function getListOptions()
      * @param string $customOptionTitle
      * @return bool
      */
-    public function isValidationErrorMessageVisible($customOptionTitle)
+    public function isJsMessageVisible($customOptionTitle)
     {
         $optionSelector = $this->customOptionField . $this->requiredOption . $this->validationErrorMessage;
         $title = sprintf($optionSelector, $customOptionTitle);

dev/tests/functional/tests/app/Magento/Catalog/Test/Constraint/AssertProductCustomOptionsErrors.php

@@ -28,7 +28,7 @@ public function processAssert(
         foreach ($products as $product) {
             foreach ($product->getData('custom_options') as $option) {
                 \PHPUnit_Framework_Assert::assertTrue(
-                    $catalogProductView->getCustomOptionsBlock()->isValidationErrorMessageVisible($option['title']),
+                    $catalogProductView->getCustomOptionsBlock()->isJsMessageVisible($option['title']),
                     'Required Custom Option ' . $option['title'] . " doesn't contain JS validation error."
                 );
             }