gistfile1.txt

require 'rest-client'

class RegistrationMailer < ActionMailer::Base

  MAILER_API_KEY = ENV['MAILGUN_API_KEY'] || 'key-####'
	MAILER_API_URL = "https://api:#{MAILER_API_KEY}@api.mailgun.net/v2/####.mailgun.org/"

  def registration_confirmation(registration)
	  RestClient.post MAILER_API_URL + "messages",
	  from: "no-reply@p3ople4u.com",
	  to: "#{registration.full_name} <#{registration.email}>",
	  subject: "Welcome to Aeneid",
	  text: "We will be posting back something <b>exciting</b> soon!"
	end
end

--------------------
require "spec_helper"

describe RegistrationMailer do
  
  let!(:registration) { FactoryGirl.create(:registration) }
  let(:mail) { RegistrationMailer.registration_confirmation(registration) }

  it "sends confirmation email" do

    mail.to.should == registration.email
  	mail.from.should == "admin@aeneid.com"
  	mail.subject.should == "Welcome to Aeneid"
  end
end

----------------------

FactoryGirl.define do
  factory :registration do
		sequence(:email) { |n| "test#{n}@test.com"}
		sequence(:last_name) { |n| "#{n}"}
		first_name "Juan"
		fave_color "Red"
	end
end

---------------------

1) RegistrationMailer sends confirmation email
     Failure/Error: mail.to.should == registration.email
       expected: "test1@test.com"
            got: nil (using ==)