如何在 RSpec 中测试 ActionMailer delivery_method？

Question

我有 2 个delivery_methods，可以使用如下环境变量进行切换：

config.action_mailer.delivery_method = :mailjet

或

config.action_mailer.delivery_method = :smtp

如何在 RSpec 测试中测试delivery_method？

Answer 1

你的意思是，测试设置是否设置？

require "rails_helper"

RSpec.describe "Rails application configuration" do
  it "set the delivery_method to test" do
    expect(Rails.application.config.action_mailer.delivery_method).to eql :test
    expect(ActionMailer::Base.delivery_method).to eql :test
  end
end

• rails/delivery_methods_test.rb at fe1f4b2ad56f010a4e9b93d547d63a15953d9dc2 · rails/rails

或者它正在使用类似于 SMTP 库之类的东西？

require "rails_helper"
require "net/smtp"

RSpec.describe "Mail is sent via Net::SMTP" do
  class MockSMTP
    def self.deliveries
      @@deliveries
    end

    def initialize
      @@deliveries = []
    end

    def sendmail(mail, from, to)
      @@deliveries << { mail: mail, from: from, to: to }
      'OK'
    end

    def start(*args)
      if block_given?
        return yield(self)
      else
        return self
      end
    end
  end

  class Net::SMTP
    def self.new(*args)
      MockSMTP.new
    end
  end

  class ExampleMailer < ActionMailer::Base
    def hello
      mail(to: "smtp_to", from: "smtp_from", body: "test")
    end
  end

  it "delivers mail via smtp" do
    ExampleMailer.delivery_method = :smtp
    mail = ExampleMailer.hello.deliver_now

    expect(MockSMTP.deliveries.first[:mail]).to eq mail.encoded
    expect(MockSMTP.deliveries.first[:from]).to eq 'smtp_from'
    expect(MockSMTP.deliveries.first[:to]).to eq %w(smtp_to)
  end
end

• mail/smtp_spec.rb at master · mikel/mail

像Max's answer 一样，您真的不能真正成为邮件程序delivery_method，因为它是一种服务，可能存在也可能不存在于您的测试环境中，因此经常被排除在外；例如

 # config/environments/test.rb
 # Tell Action Mailer not to deliver emails to the real world.
 # The :test delivery method accumulates sent emails in the
 # ActionMailer::Base.deliveries array.
 config.action_mailer.delivery_method = :test

Answer 2

你没有。你没有真正测试 BDD 或 TDD 中的配置细节，因为那是每个环境的，通常只是一个坏主意。

测试环境中的邮件程序设置为仅将电子邮件添加到假脱机，以便您可以预期/断言电子邮件已发送。

  # config/environments/test.rb
  # Tell Action Mailer not to deliver emails to the real world.
  # The :test delivery method accumulates sent emails in the
  # ActionMailer::Base.deliveries array.
  config.action_mailer.delivery_method = :test

通常做的是在生产环境中手动测试电子邮件配置。您可以从控制台执行此操作，或者如果您经常这样做，请创建一个 rake task。