Rspec mock ActiveRecord::Relation instead of class object

Question

I want to mock one line from my endpoint:

InquiryProcessFilters::CompanyName.new(params[:filters][:company_name].downcase).call

So I've mock:

let(:company_name_filter_mock) { instance_double(InquiryProcessFilters::CompanyName) }

before do
  allow(InquiryProcessFilters::CompanyName).to(receive(:new).and_return(company_name_filter_mock))
  allow(company_name_filter_mock).to receive(:call).and_return(second_inquiry_process)
end

The problem is that my class from endpoint returns result as ActiveRecord_Relation and this is my desired result. How to update my mock to achieve that?

You mean that `second_inquiry_process` is an AR relation? – mrzasa Oct 30 '19 at 21:23 — mrzasa, Oct 30 '19 at 21:23
@mrzasa yes, it should be an AR relation – mr_muscle Oct 30 '19 at 21:36 — mr_muscle, Oct 30 '19 at 21:36

score 1 · Accepted Answer · answered Oct 30 '19 at 21:47

I can see two options.

If you care about not touching DB in the spec and it's enough to get Enumerable, assign an array to second_inquiry_process, e.g.:

let(:second_inquiry_process) { [inquiry_process_instance] }

or with FactoryBot

let(:second_inquiry_process) { build_list :inquiry_process, 1 }

If you want to have full AR relation (and I suppose you do), create records in the db and assign them to the variable, e.g.:

let(:inquiry_process_instance) { create :inquiry_proces }
let(:second_inquiry_process) { InquiryProcess.where(id: inquiry_process_instance.id) }

Rspec mock ActiveRecord::Relation instead of class object

1 Answers1