郵件測試

在 使用 ActionMailer 中可以看到：

可看到除了產生郵件模型之外，還產生了郵件功能測試檔案：

• user_mailer_test.rb

require 'test_helper'

class UserMailerTest < ActionMailer::TestCase
  # test "the truth" do
  #   assert true
  # end
end

郵件測試案例是繼承自ActionMailer::TestCase。在測試環境中設定檔test.rb中，config.action_mailer.delivery_method是設定為:test，這個設定下郵件並不會真的發送出去，而會儲存至ActionMailer::Base.deliveries陣列中。

以測試 使用 ActionMailer 中的例子來說，在純文件與HTML樣版都存在的情況下，可如下測試郵件：

• user_mailer_test.rb

require 'test_helper'

class UserMailerTest < ActionMailer::TestCase
    test "welcome mail" do
        user = Class.new {
            def email
               "some@gmail.com"
            end
            def name
               "Some"
            end
        }.new

        email = UserMailer.welcome(user).deliver

        assert !ActionMailer::Base.deliveries.empty?
        assert_equal [user.email], email.to
        assert_equal "Welcome to Openhome.cc", email.subject
        assert_match /Welcome to Openhome.cc, #{user.name}/, email.encoded
        assert_match /<h1>Welcome to Openhome.cc, #{user.name}<\/h1>/, email.encoded
    end
end

• welcome

Welcome to Openhome.cc, Some
Thanks for joining and have a great day!

然後如下撰寫測試：

• user_mailer_test.rb

require 'test_helper'

class UserMailerTest < ActionMailer::TestCase
    tests UserMailer
    test "welcome mail" do
        @expected.from    = 'example@gmail.com'
        @expected.to      = 'some@gmail.com'
        @expected.subject = "Welcome to Openhome.cc"
        @expected.body    = read_fixture("welcome") # 讀取test/fixtures/user_mailer/welcome 檔案

        user = Class.new {
            def email
               "some@gmail.com"
            end
            def name
               "Some"
            end
        }.new

        assert_equal @expected, UserMailer.welcome(user)
    end
end