Try .any? to prevent error in dashboard on online users

app/views/alchemy/admin/dashboard/_users.html.erb

@@ -1,4 +1,4 @@
-<div class="widget">
+<div class="widget users">
   <table class="list">
     <tr>
       <th colspan="2"><%= Alchemy.t('Who else is online') %></th>

app/views/alchemy/admin/dashboard/index.html.erb

@@ -34,9 +34,10 @@
     <%= render 'recent_pages' %>
   </div>
   <div class="column right">
-    <% if @online_users.any? %>
+    <% if @online_users.try(:any?) %>
       <%= render 'users' %>
     <% end %>
+
     <% if multi_site? %>
       <%= render 'sites' %>
     <% end %>

spec/dummy/app/models/dummy_user.rb

@@ -19,4 +19,8 @@ def alchemy_roles
   def name
     @name || email
   end
+
+  def human_roles_string
+    alchemy_roles.map(&:humanize)
+  end
 end

spec/features/admin/dashboard_spec.rb

@@ -79,4 +79,39 @@
       end
     end
   end
+
+  describe 'Online users' do
+    context 'with alchemy users' do
+      let(:other_user) { build_stubbed(:alchemy_dummy_user) }
+
+      before do
+        expect(Alchemy.user_class).to receive(:logged_in) { [other_user] }
+      end
+
+      it "lists all online users besides current user" do
+        visit admin_dashboard_path
+        users_widget = all('div[@class="widget users"]').first
+        expect(users_widget).to have_content other_user.name
+        expect(users_widget).to have_content "Member"
+        expect(users_widget).not_to have_content user.name
+      end
+    end
+
+    context 'with non alchemy user class' do
+      class SomeUser; end
+      before do
+        Alchemy.user_class_name = 'SomeUser'
+      end
+
+      it "does not list online users" do
+        visit admin_dashboard_path
+        users_widget = all('div[@class="widget users"]').first
+        expect(users_widget).to be_nil
+      end
+
+      after do
+        Alchemy.user_class_name = 'DummyUser'
+      end
+    end
+  end
 end