Fix tests that was testing the wrong class.

spec/models/mailing_list_mode_site_setting_spec.rb

@@ -3,15 +3,15 @@ require 'rails_helper'
 describe MailingListModeSiteSetting do
   describe 'valid_value?' do
     it 'returns true for a valid value as an int' do
-      expect(DigestEmailSiteSetting.valid_value?(0)).to eq true
+      expect(MailingListModeSiteSetting.valid_value?(0)).to eq(true)
     end
 
-    it 'returns false for a valid value as a string' do
-      expect(DigestEmailSiteSetting.valid_value?('0')).to eq true
+    it 'returns true for a valid value as a string' do
+      expect(MailingListModeSiteSetting.valid_value?('0')).to eq(true)
     end
 
     it 'returns false for an out of range value' do
-      expect(DigestEmailSiteSetting.valid_value?(3)).to eq false
+      expect(MailingListModeSiteSetting.valid_value?(3)).to eq(false)
     end
   end
 end