[SOL-2194] Bug fix TypeError: seatData is undefined

ecommerce/static/js/test/specs/views/coupon_form_view_spec.js

@@ -80,6 +80,21 @@ define([
                     expect(view.updateTotalValue).toHaveBeenCalled();
                     expect(view.getSeatData).toHaveBeenCalled();
                 });
+
+                it('should call updateTotalValue when catalog_type "Single course"', function () {
+                    spyOn(view, 'updateTotalValue');
+                    view.changeTotalValue();
+                    expect(view.updateTotalValue).toHaveBeenCalled();
+                    expect(view.model.get('catalog_type')).toBe('Single course');
+                });
+
+                it('should not call updateTotalValue when catalog_type not "Single course"', function () {
+                    spyOn(view, 'updateTotalValue');
+                    view.model.set('catalog_type', 'Not single course');
+                    view.changeTotalValue();
+                    expect(view.updateTotalValue).not.toHaveBeenCalled();
+                    expect(view.model.get('catalog_type')).not.toBe('Single course');
+                });
             });
 
             describe('enrollment code', function () {

ecommerce/static/js/views/coupon_form_view.js

@@ -572,7 +572,9 @@ define([
             },
 
             changeTotalValue: function () {
-                this.updateTotalValue(this.getSeatData());
+                if (this.model.get('catalog_type') === 'Single course' && this.getSeatType() !== null) {
+                    this.updateTotalValue(this.getSeatData());
+                }
             },
 
             updateTotalValue: function (seatData) {