Rails教程ch10测试10.20失败

Question

我对Rails教程中的测试10.20有问题。使用命令后：

bundle exec rake测试:mailers

我收到了错误：

Run options: --seed 6131

# Running:

F

Finished in 0.559132s, 1.7885 runs/s, 5.3655 assertions/s.

  1) Failure:
UserMailerTest#test_account_activation [/home/adam/workspace/sample_app    /test/mailers/user_mailer_test.rb:11]:
Expected: ["noreply@example.com"]
Actual: nil

1 runs, 3 assertions, 1 failures, 0 errors, 0 skips

我已经彻底检查了我的代码，并没有发现不恰当之处，但我显然做错了。

这是我的user_mailer：

class UserMailer < ActionMailer::Base

  def account_activation(user)
    @user = user
    mail to: user.email, subject: "Account activation"
  end

  def password_reset
    @greeting = "Hi"

    mail to: "to@example.org"
  end
end

user_mailer_test：

require 'test_helper'

class UserMailerTest < ActionMailer::TestCase

  test "account_activation" do
    user = users(:michael)
    user.activation_token = User.new_token
    mail = UserMailer.account_activation(user)
    assert_equal "Account activation", mail.subject
    assert_equal [user.email], mail.to
    assert_equal ["noreply@example.com"], mail.from
    assert_match user.name,               mail.body.encoded
    assert_match user.activation_token,   mail.body.encoded
    assert_match CGI::escape(user.email), mail.body.encoded
  end
end

我已经将这一行添加到config/environments/test.rb中：

config.action_mailer.default_url_options = { host: 'example.com' }

能给我点建议吗？

Answer 1

您需要将:from添加到这一行

mail to: user.email, subject: "Account activation"

像这样

mail to: user.email, from: "noreply@example.com", subject: "Account activation"

Answer 2

所有对用户邮件程序的引用都应以

class UserMailer < ApplicationMailer

这是由于Rails 4.2中最近发生的变化。当我上周更新教程时，我遗漏了几个参考资料，但现在已经更正了。确保您还包括应用程序邮件程序，如清单10.8所示。实际上，从零开始删除并重新生成邮件程序可能是个好主意，以确保代码符合Rails 4.2所期望的结构。

Answer 3

只需从以下内容编辑user_mailer.rb文件：

class UserMailer < ActionMailer::Base

对此：

class UserMailer < ApplicationMailer

原因是default from:地址在default from:文件中，它从ActionMailer::Base中提取