RSpec에 테스트 인스턴스 방법은 객체 메소드 호출하면 나는 class_double 방법을 사용하려고 시도하고

Question

은 여기에서 설명 : 여기에

https://relishapp.com/rspec/rspec-mocks/docs/verifying-doubles/using-a-class-double 내 코드입니다 :

search.rb

class Search < ActiveRecord::Base 
    def find_events 
    events = Event.find_by_dates(beginning_date, end_date) 
    end 
end 

event.rb

class Event < ActiveRecord::Base 
    scope :find_by_dates, ->(starting_date , ending_date) { where('(date(start_datetime) >= ? AND date(end_datetime) <= ?)', starting_date.to_date, ending_date.to_date)} 
end 

search_spec.rb

,363,210

let(:march1) {DateTime.parse('1st March 2014')} 
    let(:march3) {DateTime.parse('3rd March 2014')} 
    let(:march_search) {create(:search, beginning_date: march1, end_date: march3)} 
    let(:mar1_event) {create(:event, 
         start_datetime: DateTime.parse('1st March 2014 04:00:00 PM'), 
         end_datetime: DateTime.parse('1st March 2014 06:00:00 PM'))} 

    let(:mar2_event) {create(:event, 
         start_datetime: DateTime.parse('2nd March 2014 04:00:00 PM'), 
         end_datetime: DateTime.parse('2nd March 2014 06:00:00 PM'))} 

    let(:mar1_to_3_event) {create(:event, 
          start_datetime: DateTime.parse('1st March 2014 04:00:00 PM'), 
          end_datetime: DateTime.parse('3rd March 2014 06:00:00 PM'))} 
    let(:march_search) {create(:search, beginning_date: march1, end_date: march3)} 


describe 'find_events method' do 
    it 'should call Event.find_by_dates' do 
    event = class_double("Event").as_stubbed_const(:transfer_nested_constants => true) 
    expect(event).to receive(:find_by_dates).with(march1, march3) 
    march_search.find_events 
end 
it 'should return events within a date range' do 
    events = march_search.find_events 
    expect(events).to include(mar1_event, mar2_event, mar1_to_3_event) 
end 

it 'it should not return events outside of the date range' do 
    events = sept_search.find_events 
    expect(events).to_not include(mar1_event, mar2_event, mar1_to_3_event) 
end 

지금까지 아무 문제없는 나는 문자열을 어떤 결과를 찾을 수 없습니다 있는지 확인하고 반환 할 때까지

다음

def find_events 
    events = Event.find_by_dates(beginning_date, end_date) 
    if events.empty? 
    return "SORRY NO RESULTS FOUND" 
    end 
end 

내가받을 다음과 같은 오류

실패 :

1) Search find_events method it should not return events outside of the date range 
Failure/Error: expect(events).to_not include(mar1_event, mar2_event, mar1_to_3_event) 
TypeError: 
    no implicit conversion of Event into String 
# ./spec/models/search_spec.rb:93:in `block (3 levels) in <top (required)>' 

2) Search find_events method should call Event.find_by_dates 
Failure/Error: march_search.find_events 
NoMethodError: 
    undefined method `empty?' for nil:NilClass 
# ./app/models/search.rb:41:in `find_events' 
# ./spec/models/search_spec.rb:84:in `block (3 levels) in <top (required)>' 

3) Search find_events method should return events within a date range 
Failure/Error: expect(events).to include(mar1_event, mar2_event, mar1_to_3_event) 
TypeError: 
    no implicit conversion of Event into String 
# ./spec/models/search_spec.rb:88:in `block (3 levels) in <top (required)>' 

Event.find_by_dates가 0인지 확인했지만 다음 오류가 발생했습니다. 정의되지 않은 메서드`include? ' nil 클래스의 경우

빈 ActiveRelation 객체가 반환되어 검색을 계속할 수 없는지 확인해야합니다. 아무도 비어있는 검색 결과를 테스트하는 방법을 말해 줄 수 있습니까?

감사합니다.

Answer 1

테스트가 잘못되었습니다. Event 클래스에서 Event.find_by_dates가 반환하는 것을 테스트합니다.

Search 클래스의 find_events에 관심이 있으시면 이벤트 모음이나 문자열을 반환하는지 여부에 관심이 있습니다.

이벤트에서 find_by_dates를 스텁하기 만하면 비어있는 것 또는없는 것을 반환합니다.

은 그래서 당신은 테스트 후를 unstub하는 것을 잊지 마세요, Event.any_instance.stub(:find_by_dates).and_return('')

PS의 동등합니다. :