Select closest value to remaining duration when editing a block

test/controllers/user_blocks_controller_test.rb

@@ -244,6 +244,34 @@ class UserBlocksControllerTest < ActionDispatch::IntegrationTest
     assert_select "p", "Sorry, the user block with ID 99999 could not be found."
   end
 
+  ##
+  # test the edit action when the remaining block duration doesn't match the available select options
+  def test_edit_duration
+    moderator_user = create(:moderator_user)
+
+    freeze_time do
+      active_block = create(:user_block, :creator => moderator_user, :ends_at => Time.now.utc + 96.hours)
+
+      session_for(moderator_user)
+      get edit_user_block_path(active_block)
+
+      assert_select "form#edit_user_block_#{active_block.id}", :count => 1 do
+        assert_select "select#user_block_period", :count => 1 do
+          assert_select "option[value='96'][selected]", :count => 1
+        end
+      end
+
+      travel 2.hours
+      get edit_user_block_path(active_block)
+
+      assert_select "form#edit_user_block_#{active_block.id}", :count => 1 do
+        assert_select "select#user_block_period", :count => 1 do
+          assert_select "option[value='96'][selected]", :count => 1
+        end
+      end
+    end
+  end
+
   ##
   # test the create action
   def test_create