我有以下失败的测试:
describe Image do
describe 'a_method' do
it 'sends email' do
Image.count.should == 1
expect do
ImageMailer.deleted_image(Image.last.id).deliver
end.to change(ActionMailer::Base.deliveries, :length)
end
end
end
这是我的邮件:
class ImageMailer < ActionMailer::Base
layout 'email'
default from: 'whee@example.com'
def deleted_image image_id, recipient='whee@example.com'
@image = Image.find(image_id)
subject = "Image email"
mail(to: recipient, subject: subject) do |format|
format.text
format.html { render layout: 'email' }
end
end
end
我的测试失败了Failure/Error: expect do length should have changed, but is still 0
。我对我的邮件本身进行了另一次测试,然后通过了:
describe ImageMailer do
it 'should deliver the mail' do
expect do
subject.deliver
end.to change { ActionMailer::Base.deliveries.length }.by(1)
end
end
我不知道为什么ActionMailer::Base.deliveries
在我的模型规范中总是空的,而不是我的邮件规范。邮件显然有效。我的模型测试最初是不同的,测试我的模型上的方法是否导致发送电子邮件,但是当无法生成邮件传递时,我明确地尝试了ImageMailer.deleted_image(Image.last.id).deliver
行并且它不起作用。 RSpec测试有什么特别之处,其中描述的对象是邮件类吗?
以下是我的config / environments / test.rb文件中的一些相关行:
config.action_mailer.delivery_method = :test
config.action_mailer.default_url_options = {host: 'localhost:3000'}
config.action_mailer.perform_deliveries = true
答案 0 :(得分:2)
should_receive
和and_return
的组合使我的测试通过:
it 'send email for an image not in Amazon that is in our table' do
mailer = double
mailer.should_receive(:deliver)
ImageMailer.should_receive(:deleted_image).and_return(mailer)
ImageMailer.deleted_image(Image.last.id).deliver
end
当我评论ImageMailer.deleted_image(Image.last.id).deliver
时,测试按预期失败。由此,我能够用我的实际测试替换ImageMailer.deleted_image(Image.last.id).deliver
,我检查在我的模型上调用方法会导致发送电子邮件。