将 rspec 中的方法内的 class 方法存根为 return true

Question

这是我正在为其编写 rspecs 的 class。

# frozen_string_literal: true. Thiis is the method **SiteLicenseService.get_package_for_site_license site_license_id, package_id**

module SiteLicenseGrants
  # Raise an error if no site license is found for a given package
  class Package
    # Fail if the given packages are not found or if they are not associated
    # with the site license
    def self.valid_package?(opts)
      package_id = opts[:package_id]
      site_license_id = opts[:site_license_id]
      return true if SiteLicenseService.get_package_for_site_license site_license_id, package_id
    rescue Errors::EntityNotFound
      raise Errors::NoSiteLicenseForPackage.new package_id # rubocop:disable Style/RaiseArgs
    end
  end
end

我想将 class 方法存根为 return true。

require "rails_helper"

RSpec.describe SiteLicenseGrants::Package do
  describe "check valid package" do

    context "valid package" do
      let(:package_id) { 1 }
      let(:site_license_id) { 1 }
      let(:opts) { { package_id: package_id, site_license_id: site_license_id } }
      before do
        site_license_service = class_double("SiteLicenseService")
        allow(site_license_service).to receive(:get_package_for_site_license).with(site_license_id, package_id).and_return(true)
      end

      it "returns true" do
        expect do
          described_class.valid_package?(opts)
        end.to be_truthy
      end
    end

    context "invalid package" do
      let(:opts) { { package_id: nil, site_license_id: nil } }
      it "throws error" do
        expect do
          described_class.valid_package?(opts)
        end.to raise_error(Errors::NoSiteLicenseForPackage)
      end
    end
  end
end

这是我得到的错误

Failures:

  1) SiteLicenseGrants::Package check valid package valid package returns true
     Failure/Error: raise Errors::NoSiteLicenseForPackage.new package_id # rubocop:disable Style/RaiseArgs
     
     Errors::NoSiteLicenseForPackage:
       Package 1 doesn't have a site license associated with it

我只想将我的 class 方法模拟为 return true。我不想测试 SiteLicenseService 的 class 方法。我不想从字面上创建带有包的站点许可证。

谁能解释一下我做错了什么。

谢谢

Answer 1

确保模拟 return 值的语法正确：

 allow(SiteLicenseService).to 
 receive(:get_package_for_site_license).and_return(true)

在Ruby中，类是TitleCase，方法是snake_case。要接收的方法应该是 :symbol.

Answer 2

我像这样更改了存根，它开始工作了

 before do
        allow(SiteLicenseService).to receive(:get_package_for_site_license).and_return(true)
      end

现在它不寻找关系。但如果有人告诉我内部发生了什么变化，我将不胜感激。

将 rspec 中的方法内的 class 方法存根为 return true

stubbing a class method inside a method in rspec to return true

ruby

rspec

rspec-rails

rspec3

ruby-on-rails-5