ENGCOM-6520: Fixed Special Price class not added in configurable product page #26170

 - Merge Pull Request #26170 from ravi-chandra3197/magento2:patch-24972
 - Merged commits:
   1. 666d4c0
   2. e037d51

Author: magento-engcom-team

app/code/Magento/Swatches/view/base/web/js/swatch-renderer.js

@@ -952,6 +952,8 @@ define([
 
             isShow = typeof result != 'undefined' && result.oldPrice.amount !== result.finalPrice.amount;
 
+            $productPrice.find('span:first').toggleClass('special-price', isShow);
+
             $product.find(this.options.slyOldPriceSelector)[isShow ? 'show' : 'hide']();
 
             if (typeof result != 'undefined' && result.tierPrices && result.tierPrices.length) {

dev/tests/js/jasmine/tests/app/code/Magento/Swatches/view/frontend/web/js/swatch-renderer.test.js

@@ -28,6 +28,7 @@ define([
                     id: optionId
                 }]
             };
+
             widget.options = {
                 classes: {
                     optionClass: 'swatch-option'
@@ -50,6 +51,7 @@ define([
                     }
                 }
             };
+
             optionConfig = widget.options.jsonSwatchConfig[attribute.id];
             html = $(widget._RenderSwatchOptions(attribute, 'option-label-control-id-1'))[0];
         });
@@ -76,5 +78,25 @@ define([
             expect(html.style.height).toEqual(swathImageHeight + 'px');
             expect(html.style.width).toEqual(swathImageWidth + 'px');
         });
+
+        it('check udate price method', function () {
+            var productPriceMock = {
+                find: jasmine.createSpy().and.returnValue({
+                    hide: jasmine.createSpy(),
+                    priceBox: jasmine.createSpy().and.returnValue(''),
+                    trigger: jasmine.createSpy(),
+                    find: jasmine.createSpy().and.returnValue({
+                        toggleClass: jasmine.createSpy()
+                    })
+                })
+            };
+
+            widget.element =  {
+                parents: jasmine.createSpy().and.returnValue(productPriceMock)
+            };
+            widget._getNewPrices  = jasmine.createSpy().and.returnValue(undefined);
+            widget._UpdatePrice();
+            expect(productPriceMock.find().find.calls.count()).toBe(1);
+        });
     });
 });