counter_cache_test.rb

RSpec.describe UpdateCounterCachesJob, type: :job do 
  it 'updates all cache columns when they are out of sync' do sql = <<-SQL update categories SET articles_count = 5 SQL
    category = create(:category)
    ActiveRecord::Base.connection.execute(sql)
    category.reload
    expect(category.articles_count).to eq(5)
    UpdateCounterCachesJob.perform_now
    category.reload
    expect(category.articles_count).to eq(0)
  end

  it 'updates an individual model\'s cache columns' do
    sql = <<-SQL
    update categories
    SET articles_count = 5
    SQL

    category = create(:category)
    ActiveRecord::Base.connection.execute(sql)
    category.reload
    expect(category.articles_count).to eq(5)
    UpdateCounterCachesJob.perform_now('category')
    category.reload
    expect(category.articles_count).to eq(0)
  end
end