Merge pull request #275 from mlovic/filter-topic

Allow debates to be filtered by topic

spec/features/debates_spec.rb

@@ -407,4 +407,34 @@ feature 'Debates' do
       expect(@most_liked_debate.title).to appear_before(@most_voted_debate.title)
     end
   end
+
+  feature 'Debates can be filtered by tags', :js do
+    let!(:debate1) { create(:debate, tag_list: ["Deporte", "Corrupción"]) }
+    let!(:debate2) { create(:debate, tag_list: ["Deporte", "Fiestas populares"]) }
+    let!(:debate3) { create(:debate, tag_list: ["Corrupción", "Fiestas populares"]) }
+
+    scenario 'By default no tag filter is applied' do
+      visit debates_path
+
+      expect(page).to have_content('Filter by topic')
+      expect(page).not_to have_content('with the topic')
+      expect(page).to have_selector('#debates .debate', count: 3)
+    end
+
+    scenario 'Debates are filtered by single tag' do
+      visit debates_path
+
+      select('Deporte', from: 'tag-filter')
+
+      expect(page).not_to have_content('Filter by topic')
+      expect(page).not_to have_select('tag-filter')
+      expect(page).to have_content('with the topic')
+      expect(current_url).to include('tag=Deporte')
+
+      expect(page).to have_selector('#debates .debate', count: 2)
+      expect(page).to_not have_content(debate3.title) 
+      expect(page).to have_content(debate1.title) 
+      expect(page).to have_content(debate2.title) 
+    end
+  end
 end