Ruby on rails 如何在RSpec中测试ActionMailer交付方法？

我有2个

delivery\u方法

s，可使用如下环境变量进行切换：

config.action_mailer.delivery_method = :mailjet

或

---

如何在RSpec测试中测试

delivery\u方法？
您不需要。您不需要在BDD或TDD中真正测试配置细节，因为这是基于环境的，通常是个坏主意

相反，测试环境中的邮件程序设置为只向假脱机添加电子邮件，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

通常的做法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，或者如果经常执行此操作，则可以创建一个。
您的意思是，测试是否设置了此设置

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




或者它正在使用类似SMTP库的东西，这些东西都是在它下面使用的

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

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

 # 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