require 'rails_helper' describe DigestEmailSiteSetting do describe 'valid_value?' do it 'returns true for a valid value as an int' do expect(DigestEmailSiteSetting.valid_value?(1440)).to eq true end it 'returns true for a valid value as a string' do expect(DigestEmailSiteSetting.valid_value?('1440')).to eq true end it 'returns false for an invalid value' do expect(DigestEmailSiteSetting.valid_value?('7 dogs')).to eq false end end end