NameError: 未初始化的常量 Rails::TestTask

Question

我将此代码放在我的 Rakefile 中，以便能够从附加文件夹“test/classes”（不仅仅是来自 test/models、test/controllers 等）运行测试：

# Adding test/classes directory to rake test.
namespace :test do # line 9
  desc "Test tests/classes/* code"
  Rails::TestTask.new(parsers: 'test:prepare') do |t| # line 11
    t.pattern = 'test/classes/**/*_test.rb'
  end
end

Rake::Task['test:run'].enhance ["test:classes"]

当我运行rails test时，此代码完美运行。

但是当我运行rails db:migrate ，我收到了这个错误：

NameError: uninitialized constant Rails::TestTask
/Users/Developer/project/Rakefile:11:in `block in <top (required)>'
/Users/Developer/project/Rakefile:9:in `<top (required)>'

我该怎么做才能摆脱错误，但仍然能够从

Answer 1

插入

require 'rake/testtask'

进入Rakefile

Answer 2

我在Rails 5.2升级期间（从Rails 4.2）看到了这一点。 对我来说，修复是将Rails::TestTask重命名为Rake::TestTask 。

Answer 3

截至 2021 年

在您的测试设置中，您可以加载您的任务：

before { Rails.application.load_tasks }

然后你在你的测试中调用任务：

Rake.application.invoke_task "namespace:task_name"

示例代码

假设您要测试下面的 rake 任务：

# lib/tasks/notifications.rake

namespace :notifications do
  desc "This task is called by the Heroku scheduler add-on"
  task properties_created: :environment do
    Account.all.each { |account| AccountMailer.properties_created(account).deliver } if Property.yesterday.any?
  end
end

可以测试：

# test/tasks/notifications_test.rb

require "test_helper"

class NotificationsTest < ActiveSupport::TestCase
  include ActionMailer::TestHelper

  before { Rails.application.load_tasks }

  it "does not send email if no property created yesterday" do
    account = create(:account)
    create(:property, created_at: 2.days.ago, account: account)
    assert_emails(0) { Rake.application.invoke_task "notifications:properties_created" }
  end
end