如何从 ActionMailer::Base.deliveries 获取值

Question

我正在为我的应用程序创建测试。

创建 quote_request 后，我​​会向用户发送一封确认电子邮件。我还发了一封电子邮件通知校对人员。

我仍在学习 Ruby，我确信有更好的方法来编写以下代码：

def email_exists?(email_address)
    ActionMailer::Base.deliveries.each do |m|
        if m[:to].to_s == email_address
            return true
        end
    end
end

def email_with_subject_exists?(email_address, email_subject)
    ActionMailer::Base.deliveries.each do |m|
        if m[:to].to_s == email_address && m[:subject].to_s == email_subject
            return true
        else
            return false
        end
    end
end

我发现，如果我不包含 return false，那么由于某种原因，电子邮件的全部内容都会输出。

任何改进此代码的帮助将不胜感激。

以下是 ActionMailer::Base.deliveries 的内容：

[#<Mail::Message:70094817191440, Multipart: true, Headers: <Date: Thu, 01 Sep 2016 15:50:35 +0700>, <From: from@example.com>, <To: peterjohnson1@example.com>, <Message-ID: <57c7ebdb1b5f4_2ab93fc03545e1f850559@Mitchell-Goulds-MacBook-Air.local.mail>>, <Subject: Welcome to the ProvenWord team!>, <Mime-Version: 1.0>, <Content-Type: multipart/alternative; boundary="--==_mimepart_57c7ebdb16e49_2ab93fc03545e1f85046d"; charset=UTF-8>, <Content-Transfer-Encoding: 7bit>>, #<Mail::Message:70094829223120, Multipart: true, Headers: <Date: Thu, 01 Sep 2016 15:50:35 +0700>, <From: from@example.com>, <To: peterjohnson2@example.com>, <Message-ID: <57c7ebdb23188_2ab93fc03545e1f850725@Mitchell-Goulds-MacBook-Air.local.mail>>, <Subject: Welcome to the ProvenWord team!>, <Mime-Version: 1.0>, <Content-Type: multipart/alternative; boundary="--==_mimepart_57c7ebdb229aa_2ab93fc03545e1f8506be"; charset=UTF-8>, <Content-Transfer-Encoding: 7bit>>, #<Mail::Message:70094772574660, Multipart: true, Headers: <Date: Thu, 01 Sep 2016 15:50:35 +0700>, <From: from@example.com>, <To: peterjohnson3@example.com>, <Message-ID: <57c7ebdb28936_2ab93fc03545e1f850960@Mitchell-Goulds-MacBook-Air.local.mail>>, <Subject: Welcome to the ProvenWord team!>, <Mime-Version: 1.0>, <Content-Type: multipart/alternative; boundary="--==_mimepart_57c7ebdb27bf6_2ab93fc03545e1f850835"; charset=UTF-8>, <Content-Transfer-Encoding: 7bit>>, #<Mail::Message:70094829778220, Multipart: true, Headers: <Date: Thu, 01 Sep 2016 15:50:35 +0700>, <From: from@example.com>, <To: peterjohnson4@example.com>, <Message-ID: <57c7ebdb2c982_2ab93fc03545e1f85116b@Mitchell-Goulds-MacBook-Air.local.mail>>, <Subject: Welcome to the ProvenWord team!>, <Mime-Version: 1.0>, <Content-Type: multipart/alternative; boundary="--==_mimepart_57c7ebdb2c064_2ab93fc03545e1f85104b"; charset=UTF-8>, <Content-Transfer-Encoding: 7bit>>, #<Mail::Message:70094829991680, Multipart: true, Headers: <Date: Thu, 01 Sep 2016 15:50:35 +0700>, <From: from@example.com>, <To: peterjohnson5@example.com>, <Message-ID: <57c7ebdb30c2b_2ab93fc03545e1f85135c@Mitchell-Goulds-MacBook-Air.local.mail>>, <Subject: Welcome to the ProvenWord team!>, <Mime-Version: 1.0>, <Content-Type: multipart/alternative; boundary="--==_mimepart_57c7ebdb30465_2ab93fc03545e1f85123c"; charset=UTF-8>, <Content-Transfer-Encoding: 7bit>>, #<Mail::Message:70094777280260, Multipart: true, Headers: <Date: Thu, 01 Sep 2016 15:50:35 +0700>, <From: from@example.com>, <To: johnpeters@example.com>, <Message-ID: <57c7ebdbb8421_2ab93fc03545e1f8515e5@Mitchell-Goulds-MacBook-Air.local.mail>>, <Subject: Your ProvenWord quotation request has been delivered>, <Mime-Version: 1.0>, <Content-Type: multipart/alternative; boundary="--==_mimepart_57c7ebdbb76fa_2ab93fc03545e1f8514ee"; charset=UTF-8>, <Content-Transfer-Encoding: 7bit>>]

Answer 1

我通常这样做（这是用RSpec）

it "sends correct email" do
  UserMailer.welcome_email(user).deliver
  ActionMailer::Base.deliveries.last.tap do |mail|
    expect(mail.from).to eq(["myapp@awesome.com"])
    expect(mail.subject).to eq("Welcome #{user.name}")
  end
end

编辑：

有几种方法可以做到这一点。我个人喜欢将发送内容和消息包含内容之间的逻辑分开。

控制器（最好）/模型（可能）动作是这样的：

def something
  Mailer.a(item).deliver
  Mailer.b(item).deliver
end

测试发送正确的电子邮件：

it "sends correct number of emails" do
  expect do
    ## Trigger your stuff here (#something above)
  end.to change{ ActionMailer::Base.deliveries.size }.by(2)
end

EDIT2： ^^this^^ 实际上不会测试是否发送了正确的两封电子邮件。为此，你可以做类似的事情ActionMailer::Base.deliveries.map{|e| e[:subject]}.sort == ["asubject", "bsubject"].sort，但是当你改变主题时，这就很脆弱了。由您决定在这里做什么/测试。（也看起来像assert Mailer.recieves(:a).with(obj)（我忘记了确切的语法，我不知道你正在使用什么测试框架，但它们都有类似的东西。）

测试邮件内容是否正确

it "Mailer#a has correct email content" do
  Mailer.a(user).deliver
  ActionMailer::Base.deliveries.last.tap do |mail|
    expect(mail.from).to eq(["myapp@awesome.com"])
    expect(mail.subject).to eq("Welcome #{user.name}")
  end
end
## repeat for Mailer#b