Files for adding a new test in rails codebase for issue #26122

my_assignment_test.rb

# activerecord/test/cases/my_assignment_test.rb                                
require "cases/helper"                                                             
require "models/stat"                                                              
                                                                                   
class MyAssignmentTest < ActiveRecord::TestCase                                    
  ActiveRecord::Schema.define do                                                   
    create_table :stats, force: true do |t|                                        
      t.integer :count, default: 0                                                 
    end                                                                            
  end                                                                              
                                                                                   
  def test_thousands_of_assignments                                                
    stat = Stat.new                                                                
    20_000.times { stat.count += 1 }                                               
    assert stat.save                                                               
  end                                                                              
end            

stat.rb

# activerecord/test/models/stat.rb                                                 
class Stat < ActiveRecord::Base                                                    
end   

z_run.sh

# Script to run the above test
bundle exec ruby -I activerecord/lib:activerecord/test activerecord/test/cases/my_assignment_test.rb