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EnglishUnfortunately, RSpec does not provide helpers for testing mailers like TestUnit. But it is easy to add them to your application, and here you could find code snippet for testing mailers.
For the beginning we would define helper for reading fixtures and put them into the spec/mailer_spec_helper.rb file:
1 2 3 4 5 6 7 8 9 | require File.dirname(__FILE__) + '/spec_helper.rb' module MailerSpecHelper private def read_fixture(action) IO.readlines("#{FIXTURES_PATH}/mailers/user_mailer/#{action}") end end |
Now we need to create fixtures for mailers in the spec/fixtures/mailers folder, each mailer in the separate subfolder like spec/fixtures/mailers/some_mailer/activation:
1 | Hello, Bob |
In spec/models/mailers/some_mailer_spec.rb we would write something like:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | require File.dirname(__FILE__) + '/../../mailer_spec_helper.rb' context 'The SomeMailer mailer' do FIXTURES_PATH = File.dirname(__FILE__) + '/../../fixtures' CHARSET = 'utf-8' fixtures :users include MailerSpecHelper include ActionMailer::Quoting setup do # You don't need these lines while you are using create_ instead of deliver_ #ActionMailer::Base.delivery_method = :test #ActionMailer::Base.perform_deliveries = true #ActionMailer::Base.deliveries = [] @expected = TMail::Mail.new @expected.set_content_type 'text', 'plain', { 'charset' => CHARSET } @expected.mime_version = '1.0' end specify 'should send activation email' do @expected.subject = 'Account activation' @expected.body = read_fixture('activation') @expected.from = 'no-email@example.com' @expected.to = users(:bob).email Mailers::UserMailer.create_activation(users(:bob)).encoded.should == @expected.encoded end end |
That’s almost all. We are fully confident that emails look as we expected. In controller we don’t need to re-test mailers again, we just need to become convinced of mailer calling!
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | context 'Given an signup action of UserController' do controller_name 'user' setup do @user = mock('user') @valid_user_params = { :email => 'some@example.com' } end specify 'should deliver activation email to newly created user' do User.should_receive(:new).with(@valid_user_params).and_return(@user) Mailers::UserMailer.should_receive(:deliver_activation).with(@user) post :signup, :user => @valid_user_params response.should redirect_to(user_activate_url) end end |
I’m just learning rspec and despite the now old syntax it was still very helpful. Big thanks!
Thanks a lot, Dmytro! Very helpful and shot-to-the-point article.
Thanks for the tutorial. I’d like if you could post another example using mocking and stubbing instead of fixtures.