Rails/RSpec切换缓存以进行单个测试

Question

因此,在我的应用程序中,我可以禁用所有测试的缓存,这将是理想的,但显然有许多遗留测试依赖于缓存功能.有没有办法为单个RSpec测试启用Rails缓存？

就像是:

before(:each) do
  @cache_setting = Rails.cache.null_cache
  Rails.cache.null_cache = true
end

after(:each) do
  Rails.cache.null_cache = @cache_setting
end

it 'does not hit the cache' do
  ...
end

Answer 1

在 spec_helper.rb

RSpec.configure do |config|
  config.before(:example, disable_cache: true) do
    allow(Rails).to receive(:cache).and_return(ActiveSupport::Cache::NullStore.new)
  end

  config.after(:example, disable_cache: true) do
    allow(Rails).to receive(:cache).and_call_original
  end
end

在 xxx_spec.rb

RSpec.describe "a group without matching metadata" do
  it "does not run the hook" do
     puts Rails.cache.class
  end

  it "runs the hook for a single example with matching metadata", disable_cache: true do
     puts Rails.cache.class
  end
end

https://www.relishapp.com/rspec/rspec-core/docs/hooks/filters