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rails--rails/activerecord/test/thread_safety_test.rb

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Ruby

require 'abstract_unit'
require 'fixtures/topic'
class ThreadSafetyTest < Test::Unit::TestCase
self.use_transactional_fixtures = false
fixtures :topics
def setup
@threads = []
end
def test_threading_on_transactions
# SQLite breaks down under thread banging
# Jamis Buck (author of SQLite-ruby): "I know that sqlite itself is not designed for concurrent access"
if ActiveRecord::ConnectionAdapters.const_defined? :SQLiteAdapter
return true if ActiveRecord::Base.connection.instance_of?(ActiveRecord::ConnectionAdapters::SQLiteAdapter)
end
5.times do |thread_number|
@threads << Thread.new(thread_number) do |thread_number|
first, second = Topic.find(1, 2)
Topic.transaction(first, second) do
Topic.logger.info "started #{thread_number}"
first.approved = 1
second.approved = 0
first.save
second.save
Topic.logger.info "ended #{thread_number}"
end
end
end
@threads.each { |t| t.join }
end
end