Testing ActionMailer multipart emails(text and html version) with RSpec

Question

I\'m currently testing my mailers with RSpec, but I\'ve started setting up multipart emails as described in the Rails Guides here: http://guides.rubyonrails.org/action_mailer_b

Answer 1

To supplement, nilmethod's excellent answer, you can clean up your specs by testing both text and html versions using a shared example group:

spec_helper.rb

def get_message_part (mail, content_type)
  mail.body.parts.find { |p| p.content_type.match content_type }.body.raw_source
end

shared_examples_for "multipart email" do
  it "generates a multipart message (plain text and html)" do
    mail.body.parts.length.should eq(2)
    mail.body.parts.collect(&:content_type).should == ["text/plain; charset=UTF-8", "text/html; charset=UTF-8"]
  end
end

your_email_spec.rb

let(:mail) { YourMailer.action }

shared_examples_for "your email content" do
  it "has some content" do
    part.should include("the content")
  end
end

it_behaves_like "multipart email"

describe "text version" do
  it_behaves_like "your email content" do
    let(:part) { get_message_part(mail, /plain/) }
  end
end

describe "html version" do
  it_behaves_like "your email content" do
    let(:part) { get_message_part(mail, /html/) }
  end
end