如何禁用/停止任何Rails的ActiveRecord調用一次測試

讓我們說，我將從ActiveRecord::Base功能的特定代碼段的Ruby on Rails中的功能替換爲ElasticSearch對象模型（以便不調用PostgeSQL/MySQL/SQL當擊球該對象被調用。EG串行搜索端點/works/search如何禁用/停止任何Rails的ActiveRecord調用一次測試

因此，如何確保在RSpec中沒有SQL調用時檢索數據時（如測試會引發異常，如果SQL呼叫是通過ActiveRecord的製造）

來源

2016-06-13 equivalent8

剔除ActiveRecord::Base.connection應該訣竅。

需要注意的一件事是在完成所有準備工作（Arrange部分測試）後完成。例如before(:each)可能在運行測試之前清理數據庫=> ActiveRecord.connection被觸發，您可能正在創建一些記錄，這些記錄將被ElasticSearch索引=> ActiveRecord.connection被調用。

所以是這樣的：

class WorksSearchSerializer 
    attr_reader :collection 

    def initialize(collection) 
    @collection 
    end 

    def as_json 
    [ 
     { 
     id: work.id 
     comment_ids: work.comments.map(&:id) 
     # ... other stuff that may trigger ActiveRecord call 
     } 
    ] 
    end 
end 

require 'rails_helper' 

RSpec.describe WorksSearchSerializer do 
    ShouldNotDoAnyDBConnection = Class.new(StandardError) 

    subject { described_class.new(es_works) } 
    let!(:work) { Work.create! } #this triggers ActiveRecord::Base.connection call 
    let(:es_works) { Work.__elasticsearch__.search({query: { match_all: {} }}.to_json) } 
    let(:result) { subject.as_json } 

    before do 
    sleep 0.2 # wait for ES reindex 
    end 

    it 'should not pull any relational DB records' do 
    allow(ActiveRecord::Base) 
     .to receive(:connection) 
     .and_raise(ShouldNotDoAnyDBConnection) 

    expect(result).to be_kind_of Array 

    allow(ActiveRecord::Base) 
     .to receive(:connection) 
     .and_call_original 
    end 

end

來源

2016-06-13 13:30:28 equivalent8

如何禁用/停止任何Rails的ActiveRecord調用一次測試

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