小编Suh*_* Mv的帖子

行动邮递员

def welcome_send(user)
        @user = user
        mail to: user.email, subject: 'Welcome to my site', from: 'suhasmv29@gmail.com'
    end

用于验证邮件已发送的 RSpec 测试用例

it "sends a confirmation email" do
      expect { mail.to }.to change { ActionMailer::Base.deliveries.count }.by(1)
    end

错误

expected `ActionMailer::Base.deliveries.count` to have changed by 1, but was changed by 0