Add pending tests for Sermon search
user
```ruby
require 'rails_helper'

RSpec.describe User, type: :model do
  pending "Sermons search should find all sermons by speaker" 
  pending "Sermons search should find all sermons by title" 
  pending "Sermons search should find all sermons by year" 
  pending "Sermons search should find all sermons by month" 
  pending "Sermons search should find all sermons when combining all criteria" 
end
```
assistant