Use Prev/Next pagination for exploring projects

This changes the pagination of the "Explore" pages so they use a simpler
pagination system that only shows "Prev" and "Next" buttons. This
removes the need for getting the total number of rows to display, a
process that can easily take up to 2 seconds when browsing through a
large list of projects.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/27390

1 files changed, 23 insertions, 0 deletions

diff --git a/spec/helpers/pagination_helper_spec.rb b/spec/helpers/pagination_helper_spec.rb
new file mode 100644
index 00000000000..e235475fb47
--- /dev/null
+++ b/spec/helpers/pagination_helper_spec.rb
@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+describe PaginationHelper do
+  describe '#paginate_collection' do
+    let(:collection) { User.all.page(1) }
+
+    it 'paginates a collection without using a COUNT' do
+      without_count = collection.without_count
+
+      expect(helper).to receive(:paginate_without_count)
+        .with(without_count)
+        .and_call_original
+
+      helper.paginate_collection(without_count)
+    end
+
+    it 'paginates a collection using a COUNT' do
+      expect(helper).to receive(:paginate_with_count).and_call_original
+
+      helper.paginate_collection(collection)
+    end
+  end
+end