Use system specs instead of feature specs

We get rid of database cleaner, and JavaScript tests are faster because
between tests we now rollback transactions instead of truncating the
database.

spec/shared/system/admin_progressable.rb

@@ -0,0 +1,122 @@
+shared_examples "admin_progressable" do |factory_name, path_name|
+  let!(:progressable) { create(factory_name) }
+
+  describe "Manage progress bars" do
+    let(:progressable_path) { send(path_name, *resource_hierarchy_for(progressable)) }
+
+    let(:path) do
+      polymorphic_path([:admin, *resource_hierarchy_for(progressable.progress_bars.new)])
+    end
+
+    context "Index" do
+      scenario "Link to index path" do
+        create(:progress_bar, :secondary, progressable:  progressable,
+               title:      "Reading documents",
+               percentage: 20)
+
+        visit progressable_path
+        click_link "Manage progress bars"
+
+        expect(page).to have_content "Reading documents"
+      end
+
+      scenario "No progress bars" do
+        visit path
+
+        expect(page).to have_content("There are no progress bars")
+      end
+    end
+
+    context "New" do
+      scenario "Primary progress bar", :js do
+        visit path
+        click_link "Create new progress bar"
+
+        select "Primary", from: "Type"
+
+        expect(page).not_to have_field "Title"
+        expect(page).not_to have_content "Add language"
+
+        fill_in "Current progress", with: 43
+        click_button "Create Progress bar"
+
+        expect(page).to have_content "Progress bar created successfully"
+        expect(page).to have_content "43%"
+        expect(page).to have_content "Primary"
+        expect(page).to have_content "Primary progress bar"
+      end
+
+      scenario "Secondary progress bar", :js do
+        visit path
+        click_link "Create new progress bar"
+
+        select "Secondary", from: "Type"
+
+        expect(page).to have_content "Add language"
+
+        fill_in "Current progress", with: 36
+        fill_in "Title", with: "Plant trees"
+        click_button "Create Progress bar"
+
+        expect(page).to have_content "Progress bar created successfully"
+        expect(page).to have_content "36%"
+        expect(page).to have_content "Secondary"
+        expect(page).to have_content "Plant trees"
+      end
+    end
+
+    context "Edit" do
+      scenario "Primary progress bar", :js do
+        bar = create(:progress_bar, progressable: progressable)
+
+        visit path
+        within("#progress_bar_#{bar.id}") { click_link "Edit" }
+
+        expect(page).to have_field "Current progress"
+        expect(page).not_to have_field "Title"
+        expect(page).not_to have_content "Add language"
+
+        fill_in "Current progress", with: 44
+        click_button "Update Progress bar"
+
+        expect(page).to have_content "Progress bar updated successfully"
+
+        within("#progress_bar_#{bar.id}") do
+          expect(page).to have_content "44%"
+        end
+      end
+
+      scenario "Secondary progress bar", :js do
+        bar = create(:progress_bar, :secondary, progressable: progressable)
+
+        visit path
+        within("#progress_bar_#{bar.id}") { click_link "Edit" }
+
+        expect(page).to have_content "Add language"
+
+        fill_in "Current progress", with: 76
+        fill_in "Title", with: "Updated title"
+        click_button "Update Progress bar"
+
+        expect(page).to have_content "Progress bar updated successfully"
+
+        within("#progress_bar_#{bar.id}") do
+          expect(page).to have_content "76%"
+          expect(page).to have_content "Updated title"
+        end
+      end
+    end
+
+    context "Delete" do
+      scenario "Remove progress bar" do
+        bar = create(:progress_bar, progressable: progressable, percentage: 34)
+
+        visit path
+        within("#progress_bar_#{bar.id}") { click_link "Delete" }
+
+        expect(page).to have_content "Progress bar deleted successfully"
+        expect(page).not_to have_content "34%"
+      end
+    end
+  end
+end