mailer spec

config/environments/test.rb

@@ -30,6 +30,7 @@ Metamaps::Application.configure do
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
+  config.action_mailer.default_url_options = { host: 'localhost:3000' }
 
   # Print deprecation notices to the stderr
   config.active_support.deprecation = :stderr

spec/mailers/map_mailer_spec.rb

@@ -0,0 +1,17 @@
+require 'rails_helper'
+
+RSpec.describe MapMailer, type: :mailer do
+  let(:map) { create(:map) }
+  let(:inviter) { create(:user) }
+  let(:invitee) { create(:user) }
+  describe 'invite_to_edit_email' do
+    let(:mail) { described_class.invite_to_edit_email(map, inviter, invitee) }
+
+    it { expect(mail.from).to eq ['team@metamaps.cc'] }
+    it { expect(mail.to).to eq [invitee.email] }
+    it { expect(mail.subject).to match map.name }
+    it { expect(mail.body.encoded).to match inviter.name }
+    it { expect(mail.body.encoded).to match map.name }
+    it { expect(mail.body.encoded).to match map_url(map) }
+  end
+end