单元测试- Rails -如何测试ActionMailer发送了一个特定的附件

Question

在我的ActionMailer::TestCase测试中，我期待:

@expected.to      = BuyadsproMailer.group_to(campaign.agency.users)
@expected.subject = "You submitted #{offer_log.total} worth of offers for #{offer_log.campaign.name} "
@expected.from    = "BuyAds Pro <[e-mail]>"
@expected.body    = read_fixture('deliver_to_agency')
@expected.content_type = "multipart/mixed;rn boundary="something""
@expected.attachments["#{offer_log.aws_key}.pdf"] = {
  :mime_type => 'application/pdf',
  :content => fake_pdf.body
}

和存根我的邮件，以获得fake_pdf，而不是一个真正的PDF通常从S3获取，所以我确信PDF的主体匹配。

然而，我得到这个长错误告诉我，一个电子邮件是预期的，但收到了一个稍微不同的电子邮件:

<...Mime-Version: 1.0rnContent-Type: multipart/mixedrnContent-Transfer-Encoding: 7bit...> expected but was
<...Mime-Version: 1.0rnContent-Type: multipart/mixed;rn boundary="--==_mimepart_50f06fa9c06e1_118dd3fd552035ae03352b";rn charset=UTF-8rnContent-Transfer-Encoding: 7bit...>

我没有匹配生成的电子邮件的字符集或部分边界。

我如何定义或存根我期望的电子邮件的这方面?

Answer 1

这是我从特定附件的rspec测试中复制的一个示例，希望它能有所帮助(邮件可以通过调用您的mailer方法或在调用.deliver后偷看交付数组来创建):

  mail.attachments.should have(1).attachment
  attachment = mail.attachments[0]
  attachment.should be_a_kind_of(Mail::Part)
  attachment.content_type.should be_start_with('application/ics;')
  attachment.filename.should == 'event.ics'

Answer 2

我有类似的东西，我想检查附加的csv的内容。我需要这样的东西，因为它看起来像r插入了换行符:

expect(mail.attachments.first.body.encoded.gsub(/r/, '')).to(
  eq(
    <<~CSV
      "Foo","Bar"
      "1","2"
    CSV
  )
)