Mailer test example

spec_mailers_mailer_spec.rb

describe 'SomethingMailer' do
  include Rails.application.routes.url_helpers
  let(:something) { create :something }
 
  describe 'accepted' do
    let(:mail) { SomethingMailer.accepted(something) }
 
    it 'renders the subject' do
      mail.subject.should == 'Subject Accepted'
    end
 
    #ensure that the receiver is correct
    it 'renders the receiver email' do
      mail.to.should == [something.email]
    end
 
    #ensure that the sender is correct
    it 'renders the sender email' do
      mail.from.should == [AppConfig['something_mail']]
    end
 
    #ensure that the @name variable appears in the email body
    it 'assigns {{name}}' do
      mail.body.encoded.should match("Hello #{something.name}!")
    end
  end
end