Add animation to sweep progress bars with bootstrap class. Resolves d…

…iffux#77.

app/helpers/sweeps_helper.rb

@@ -36,7 +36,9 @@ def sweep_progress_bar(sweep)
        auto_refresh_type: 'sweep',
        auto_refresh_id:   sweep.id,
      }
-    content_tag(:div, class: 'progress',
+    klass = "progress"
+    klass += " progress-striped active" if sweep.count_pending > 0
+    content_tag(:div, class: klass,
                       title: sweep_status(sweep),
                       data:  data_attrs) do
       PROGRESS_BAR_STYLE_MAPPINGS.map do |state, bootstrap_class|

spec/helpers/sweeps_helper_spec.rb

@@ -50,4 +50,35 @@
       it { should == '3 accepted, 2 rejected' }
     end
   end
+
+  describe '#sweep_progress_bar' do
+    let(:counts) do
+      {
+        pending:      10,
+        rejected:     0,
+        accepted:     0,
+        under_review: 0,
+      }
+    end
+    let(:sweep) do
+      build :sweep, count_rejected:     counts[:rejected],
+                    count_pending:      counts[:pending],
+                    count_accepted:     counts[:accepted],
+                    count_under_review: counts[:under_review]
+    end
+
+    let(:progress_bar) { sweep_progress_bar sweep }
+
+    context 'with pending snapshots' do
+      it "should have the progress-striped class" do
+        expect(progress_bar[0..44]).to eq '<div class="progress progress-striped active"'
+      end
+    end
+    context 'with all snapshots completed' do
+      it "should only have the progress class" do
+        counts[:pending] = 0
+        expect(progress_bar[0..20]).to eq '<div class="progress"'
+      end
+    end
+  end
 end