Helper method for when a banner expires for index page

app/helpers/banner_helper.rb

@@ -4,4 +4,14 @@ def conditionally_add_hidden_class(current_banner_is_active)
       "d-none"
     end
   end
+
+  def banner_expiration_time_in_words(banner)
+    if banner.expired?
+      "Yes"
+    elsif banner.expires_at
+      "in #{distance_of_time_in_words(Time.now, banner.expires_at)}"
+    else
+      "No"
+    end
+  end
 end

app/views/banners/index.html.erb

@@ -45,11 +45,7 @@
                   <% end %>
                 </td>
                 <td class="min-width">
-                  <% if banner.expires_at %>
-                    <%= distance_of_time_in_words(Time.now, banner.expires_at) %>
-                  <% else %>
-                    No
-                  <% end %>
+                  <%= banner_expiration_time_in_words(banner) %>
                 </td>
                 <td class="min-width">
                   <%= banner.user.display_name %>

spec/helpers/banner_helper_spec.rb

@@ -35,4 +35,32 @@
       expect(helper.conditionally_add_hidden_class(true)).to eq(nil)
     end
   end
+
+  describe "#banner_expiration_time_in_words" do
+    let(:banner) { create(:banner, expires_at: expires_at) }
+
+    context "when expires_at isn't set" do
+      let(:expires_at) { nil }
+
+      it "returns No" do
+        expect(helper.banner_expiration_time_in_words(banner)).to eq("No")
+      end
+    end
+
+    context "when expires_at is in the future" do
+      let(:expires_at) { 7.days.from_now }
+
+      it "returns a word description of how far in the future" do
+        expect(helper.banner_expiration_time_in_words(banner)).to eq("in 7 days")
+      end
+    end
+
+    context "when expires_at is in the past" do
+      let(:expires_at) { 7.days.ago }
+
+      it "returns yes" do
+        expect(helper.banner_expiration_time_in_words(banner)).to eq("Yes")
+      end
+    end
+  end
 end