mailer_spec.rb

class DealersMailer < ActionMailer::Base
  default from: "[email protected]"

  def notify_admin(dealer)
    @dealer = dealer

    mail :to => "[email protected]", :subject => "novo revendedor cadastrado"
  end

  def send_confirmation(dealer)
    @dealer = dealer

    mail :to => @dealer.email, :subject => "seu cadastro foi confirmado"
  end

end

############################################################

require "spec_helper"

describe DealersMailer do
  describe "notify_admin" do
    #aqui poderia mockar o model
    let(:dealer) { Factory.create(:dealer) }
    let(:mail) { DealersMailer.notify_admin(dealer) }

    it "renders the headers" do
      mail.subject.should eq("novo revendedor cadastrado")
      mail.to.should eq(["[email protected]"])
      mail.from.should eq(["[email protected]"])
    end

    it "renders the body" do
      mail.body.encoded.should match(dealer.name)
    end
  end

  describe "send_confirmation" do
    #aqui poderia mockar o model
    let(:dealer) { Factory.create(:dealer) }
    let(:mail) { DealersMailer.send_confirmation(dealer) }

    it "renders the headers" do
      mail.subject.should eq("seu cadastro foi confirmado")
      mail.to.should eq([dealer.email])
      mail.from.should eq(["[email protected]"])
    end

    it "renders the body" do
      mail.body.encoded.should match("confirmado")
    end
  end

end