Rspec邮件对象不响应包含？

Question

我试图通过这个screencast的帮助来学习在rails中的测试。但是，我被卡住，这一步

expect(last_email).to include(user.email) 

的错误消息是

expected #<Mail::Message:47172420, Multipart: true, Headers: <Date: Sun, 08 Feb 2015 09:51:56 +0530>, <From: from@example.com>, <To: person1@example.com>, <Message-ID: <54d6e464682e_1450a1b32815670@User-PC.mail>>, <Subject: Password Reset>, <Mime-Version: 1.0>, <Content-Type: multipart/alternative; boundary="--==_mimepart_54d6e4642e9e_1450a1b328155a"; charset=UTF-8>, <Content-Transfer-Encoding: 7bit>> to include "person1@example.com", but it does not respond to `include?` 

邮件对象不回应“包括哪些内容？”。这可能是由于rspec语法的改变，或者是代码有问题。提前感谢您的答复。

Answer 1

貌似你不调用last_emailto：

expect(last_email.to).to include(user.email)