90 lines
2.2 KiB
Ruby
90 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe EachBatch do
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describe '.each_batch' do
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let(:model) do
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Class.new(ActiveRecord::Base) do
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include EachBatch
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self.table_name = 'users'
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scope :never_signed_in, -> { where(sign_in_count: 0) }
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end
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end
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before do
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create_list(:user, 5, updated_at: 1.day.ago)
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end
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shared_examples 'each_batch handling' do |kwargs|
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it 'yields an ActiveRecord::Relation when a block is given' do
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model.each_batch(**kwargs) do |relation|
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expect(relation).to be_a_kind_of(ActiveRecord::Relation)
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end
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end
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it 'yields a batch index as the second argument' do
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model.each_batch(**kwargs) do |_, index|
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expect(index).to eq(1)
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end
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end
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it 'accepts a custom batch size' do
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amount = 0
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model.each_batch(**kwargs.merge({ of: 1 })) { amount += 1 }
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expect(amount).to eq(5)
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end
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it 'does not include ORDER BYs in the yielded relations' do
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model.each_batch do |relation|
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expect(relation.to_sql).not_to include('ORDER BY')
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end
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end
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it 'allows updating of the yielded relations' do
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time = Time.current
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model.each_batch do |relation|
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relation.update_all(updated_at: time)
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end
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expect(model.where(updated_at: time).count).to eq(5)
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end
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end
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it_behaves_like 'each_batch handling', {}
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it_behaves_like 'each_batch handling', { order_hint: :updated_at }
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it 'orders ascending by default' do
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ids = []
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model.each_batch(of: 1) { |rel| ids.concat(rel.ids) }
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expect(ids).to eq(ids.sort)
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end
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it 'accepts descending order' do
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ids = []
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model.each_batch(of: 1, order: :desc) { |rel| ids.concat(rel.ids) }
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expect(ids).to eq(ids.sort.reverse)
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end
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describe 'current scope' do
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let(:entry) { create(:user, sign_in_count: 1) }
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let(:ids_with_new_relation) { model.where(id: entry.id).pluck(:id) }
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it 'does not leak current scope to block being executed' do
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model.never_signed_in.each_batch(of: 5) do |relation|
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expect(ids_with_new_relation).to include(entry.id)
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end
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end
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end
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end
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end
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