rake 任务 rspec 测试不响应 :have_received 方法

Question

我有一个非常简单的抽取任务：

namespace :subscriptions do
  desc 'Send expired subscription notifications'
  task notify_trial_expired: :environment do
    Subscription.where(expires_at: Date.today.all_day).each { |s| s.user.notify_trial_expired }
  end
end

其中 notify_trial_expired 是模型 User 的实例方法。手动测试任务运行良好。

现在使用 rspec 这是我写的：

require 'rails_helper'

describe "notify_trial_expired" do
  let!(:subscription) { create(:subscription, expires_at: Date.today) }
  let(:user) { double(:user) }

  before do
    allow(subscription).to receive(:user) { user }
    allow(user).to receive(:notify_trial_expired)
    Rake.application.rake_require "tasks/subscriptions"
    Rake::Task.define_task(:environment)
    Rake::Task['subscriptions:notify_trial_expired'].invoke
  end

  it "should notify all user which trial expires today" do
    expect(user).to have_received(:notify_trial_expired)
  end
end

我也尝试过 expect(user).to receive 并在之后调用任务，但两种方式都显示相同的错误：

Failure/Error: expect(user).to have_received(:notify_trial_expired)

       (Double :user).notify_trial_expired(*(any args))
           expected: 1 time with any arguments
           received: 0 times with any arguments

我还检查以确保查询 Subscription.where(expires_at: Date.today.all_day) returns my subscription 确实如此。这是在 received 或 have_received 方法中的问题。

Answer 1

问题是

allow(subscription).to receive(:user) { user }

此处的对象 subscription 与您的查询返回的对象不同：Subscription.where(expires_at: Date.today.all_day)。是的，在所有实用术语中，它们是相同的记录，但从测试的角度来看并非如此（object_id 是不同的）。

您的查询看起来非常简单，所以我将其存根（或将其移至模型范围并在那里进行测试）。

allow(Subscription).to receive(:where).with(expires_at: Date.today).and_return([subscription])

现在剩下的存根应该可以工作了。

rake 任务 rspec 测试不响应 :have_received 方法

rake task rspec test does not respond to :have_received method

rspec

rake-task

ruby-on-rails-5