Rspec doesn't clear factory objects after some specs - ruby

Question

Im using clear ruby (ruby 2.3.5) without Rails and ActiveRecord and trying to write specs for some service. And if I run only part of file (including problem spec), it passed. If I run the whole file - the problem spec is failed.
By the way, I already use rspec/retry, and it settings for 20 times retry (And I see in logs, that the problem spec is failed in all 20 times).
ballot_spec.rb
# frozen_string_literal: true
require 'spec_helper'
require 'byebug'
RSpec.describe Ballot do
describe '#run' do
let(:kingdoms) { build_list(:kingdom, 6) }
let(:service) { described_class.new(kingdoms) }
before { allow(service).to receive(:hold_ballot) }
it 'holds ballot if cannot_finish_ballot? returns true' do
allow(service).to receive(:cannot_finish_ballot?).and_return(true)
service.run
expect(service).to have_received(:hold_ballot).at_least(:once)
end
it "doesn't hold ballot if cannot_finish_ballot? returns false" do
allow(service).to receive(:cannot_finish_ballot?).and_return(false)
service.run
expect(service).not_to have_received(:hold_ballot)
end
it 'returns Struct object' do
expect(service.run.class.superclass).to be Struct
end
end
describe '#hold_ballot' do
let(:all_kingdoms) { build_list(:kingdom, rand(2..10)) }
let(:pretendents) { all_kingdoms.first(rand(2..all_kingdoms.count)) }
let(:message) { build(:message, from: all_kingdoms.sample, to: all_kingdoms.sample) }
let(:expected_message_count) { pretendents.count * all_kingdoms.count }
let(:new_service) { described_class.new(pretendents) }
before do
allow(Message).to receive(:new).and_return(message)
allow(message).to receive(:send)
new_service.send('hold_ballot')
end
\/\/ THE PROBLEM IS IN THIS SPEC \/\/
it 'prepares messages to all existed kingdoms from every pretendent' do
expect(Message).to have_received(:new).exactly(expected_message_count).times
end
it 'only 6 of messages will be selected to be sent' do
expect(message).to have_received(:send).exactly(6).times
end
it 'resets Kingdoms' do
allow(Kingdom).to receive(:reset)
new_service.run
expect(Kingdom).to have_received(:reset).at_least(:once)
end
end
end
when I run rspec spec/services/ballot_spec.rb:26 (for test whole method '#hold_ballot') every spec is passed.
when I run rspec spec/services/ballot_spec.rb, I got failure:
1) Ballot#hold_ballot prepares messages to all existed kingdoms from every pretendent
Failure/Error: expect(Message).to have_received(:new).exactly(expected_message_count).times
(Message (class)).new(*(any args))
expected: 4 times with any arguments
received: 260 times with any arguments
when I use byebug, I see, that class Kingdom has dozens of objects, but variables "all_kingdoms" and "pretendents" contains not more than 10 objects.
So the once rootcause I can see here - rspec doesn't clear kingdoms, created during testing method '#run', but how to push it destroy them? I don't use ActiveRecord, don't use Rails, so cannot tun "reload!" or "destroy" explicitly. Tried to run GC.start, but it doesn't help. What can I do? Many thanks! )
spec_helper.rb
# frozen_string_literal: true
require './models/kingdom.rb'
require './models/message.rb'
require './services/message_compose.rb'
require 'factory_bot'
require 'ffaker'
require 'capybara'
require 'rspec/retry'
require './spec/factories/kingdom.rb'
require './spec/factories/message.rb'
RSpec.configure do |config|
config.verbose_retry = true
config.display_try_failure_messages = true
config.around :each do |ex|
ex.run_with_retry retry: 20 unless ex.run_with_retry
end
config.include FactoryBot::Syntax::Methods
config.expect_with :rspec do |expectations|
expectations.include_chain_clauses_in_custom_matcher_descriptions = true
end
config.mock_with :rspec do |mocks|
mocks.verify_partial_doubles = true
end
config.shared_context_metadata_behavior = :apply_to_host_groups
end