aboutsummaryrefslogblamecommitdiffstats
path: root/activerecord/test/cases/adapters/mysql2/explain_test.rb
blob: b783b5fcd9fa8af9daf655a6352f2b98b67a7639 (plain) (tree)
1
2
3
4
5
6
7

                          
                         
 

                                                      
 




                                                                                                             
 





                                                                                                                       

     
require "cases/helper"
require 'models/developer'
require 'models/computer'

class Mysql2ExplainTest < ActiveRecord::Mysql2TestCase
  fixtures :developers

  def test_explain_for_one_query
    explain = Developer.where(id: 1).explain
    assert_match %(EXPLAIN for: SELECT `developers`.* FROM `developers` WHERE `developers`.`id` = 1), explain
    assert_match %r(developers |.* const), explain
  end

  def test_explain_with_eager_loading
    explain = Developer.where(id: 1).includes(:audit_logs).explain
    assert_match %(EXPLAIN for: SELECT `developers`.* FROM `developers` WHERE `developers`.`id` = 1), explain
    assert_match %r(developers |.* const), explain
    assert_match %(EXPLAIN for: SELECT `audit_logs`.* FROM `audit_logs` WHERE `audit_logs`.`developer_id` = 1), explain
    assert_match %r(audit_logs |.* ALL), explain
  end
end