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# frozen_string_literal: true
# frozen_string_literal
require 'spec_helper'
RSpec.describe LooseIndexScan, type: :model do
let(:issue_model) do
Class.new(ApplicationRecord) do
include LooseIndexScan
self.table_name = 'issues'
end
end
let_it_be(:user_1) { create(:user) }
let_it_be(:user_2) { create(:user) }
let_it_be(:user_3) { create(:user) }
let_it_be(:issue_1) { create(:issue, author: user_2) }
let_it_be(:issue_2) { create(:issue, author: user_1) }
let_it_be(:issue_3) { create(:issue, author: user_1) }
let_it_be(:issue_4) { create(:issue, author: user_2) }
let_it_be(:issue_5) { create(:issue, author: user_3) }
context 'loading distinct author_ids' do
subject(:author_ids) { issue_model.loose_index_scan(column: :author_id, order: order).pluck(:author_id) }
shared_examples 'assert distinct values example' do
it 'loads the distinct values in the correct order' do
expect(author_ids).to eq(expected_order)
end
end
context 'when using ascending order' do
let(:order) { :asc }
let(:expected_order) { [user_1.id, user_2.id, user_3.id] }
it_behaves_like 'assert distinct values example'
context 'when null values are present' do
before do
issue_1.author_id = nil
issue_1.save!(validate: false)
end
it_behaves_like 'assert distinct values example'
end
context 'when using descending order' do
let(:order) { :desc }
let(:expected_order) { [user_3.id, user_2.id, user_1.id] }
it_behaves_like 'assert distinct values example'
end
end
end
end
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