Merge pull request #2115 from alphagov/msw/parts-in-results

Allow using data-ecommerce-index to override implicit index

app/assets/javascripts/analytics/ecommerce.js

@@ -23,6 +23,9 @@
         var contentId = $ecommerceRow.attr('data-ecommerce-content-id'),
           path = $ecommerceRow.attr('data-ecommerce-path');
 
+        var index_override = $ecommerceRow.attr('data-ecommerce-index');
+        index = index_override ? parseInt(index_override, 10) - 1 : index;
+
         addImpression(contentId, path, index + startPosition, searchQuery, listTitle, listSubheading, variant);
         trackProductOnClick($ecommerceRow, contentId, path, index + startPosition, searchQuery, listTitle, listSubheading, variant, trackClickLabel);
       });

spec/javascripts/analytics/ecommerce.spec.js

@@ -56,6 +56,29 @@ describe('Ecommerce reporter for results pages', function() {
     });
   });
 
+  it('uses data-ecommerce-index to override the implicit index', function() {
+    element = $('\
+      <div data-ecommerce-start-index="1" data-search-query="search query">\
+        <div \
+          data-ecommerce-row\
+          data-ecommerce-path="/path/to/page"\
+          data-ecommerce-index="42"\
+          data-ecommerce-content-id="AAAA-1111">\
+        </div>\
+      </div>\
+    ');
+
+    ecommerce.init(element);
+
+    expect(ga).toHaveBeenCalledWith('ec:addImpression', {
+      id: 'AAAA-1111',
+      name: "/path/to/page",
+      position: 42,
+      list: 'Site search results',
+      dimension71: 'search query'
+    });
+  });
+
   it('tracks impressions with product variants', function() {
     element = $('\
       <div data-ecommerce-start-index="1" data-search-query="search query" data-ecommerce-variant="variant-x">\