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rails--rails/activerecord/test/cases/pooled_connections_test.rb
Brandon Weiss 0965863564 Closes rails/rails#18864: Renaming transactional fixtures to transactional tests
I’m renaming all instances of `use_transcational_fixtures` to
`use_transactional_tests` and “transactional fixtures” to
“transactional tests”.

I’m deprecating `use_transactional_fixtures=`. So anyone who is
explicitly setting this will get a warning telling them to use
`use_transactional_tests=` instead.

I’m maintaining backwards compatibility—both forms will work.
`use_transactional_tests` will check to see if
`use_transactional_fixtures` is set and use that, otherwise it will use
itself. But because `use_transactional_tests` is a class attribute
(created with `class_attribute`) this requires a little bit of hoop
jumping. The writer method that `class_attribute` generates defines a
new reader method that return the value being set. Which means we can’t
set the default of `true` using `use_transactional_tests=` as was done
previously because that won’t take into account anyone using
`use_transactional_fixtures`. Instead I defined the reader method
manually and it checks `use_transactional_fixtures`. If it was set then
it should be used, otherwise it should return the default, which is
`true`. If someone uses `use_transactional_tests=` then it will
overwrite the backwards-compatible method with whatever they set.
2015-03-16 11:35:44 -07:00

81 lines
2.5 KiB
Ruby

require "cases/helper"
require "models/project"
require "timeout"
class PooledConnectionsTest < ActiveRecord::TestCase
self.use_transactional_tests = false
def setup
@per_test_teardown = []
@connection = ActiveRecord::Base.remove_connection
end
teardown do
ActiveRecord::Base.clear_all_connections!
ActiveRecord::Base.establish_connection(@connection)
@per_test_teardown.each(&:call)
end
# Will deadlock due to lack of Monitor timeouts in 1.9
def checkout_checkin_connections(pool_size, threads)
ActiveRecord::Base.establish_connection(@connection.merge({:pool => pool_size, :checkout_timeout => 0.5}))
@connection_count = 0
@timed_out = 0
threads.times do
Thread.new do
begin
conn = ActiveRecord::Base.connection_pool.checkout
sleep 0.1
ActiveRecord::Base.connection_pool.checkin conn
@connection_count += 1
rescue ActiveRecord::ConnectionTimeoutError
@timed_out += 1
end
end.join
end
end
def checkout_checkin_connections_loop(pool_size, loops)
ActiveRecord::Base.establish_connection(@connection.merge({:pool => pool_size, :checkout_timeout => 0.5}))
@connection_count = 0
@timed_out = 0
loops.times do
begin
conn = ActiveRecord::Base.connection_pool.checkout
ActiveRecord::Base.connection_pool.checkin conn
@connection_count += 1
ActiveRecord::Base.connection.tables
rescue ActiveRecord::ConnectionTimeoutError
@timed_out += 1
end
end
end
def test_pooled_connection_checkin_one
checkout_checkin_connections 1, 2
assert_equal 2, @connection_count
assert_equal 0, @timed_out
assert_equal 1, ActiveRecord::Base.connection_pool.connections.size
end
def test_pooled_connection_checkin_two
checkout_checkin_connections_loop 2, 3
assert_equal 3, @connection_count
assert_equal 0, @timed_out
assert_equal 2, ActiveRecord::Base.connection_pool.connections.size
end
def test_pooled_connection_remove
ActiveRecord::Base.establish_connection(@connection.merge({:pool => 2, :checkout_timeout => 0.5}))
old_connection = ActiveRecord::Base.connection
extra_connection = ActiveRecord::Base.connection_pool.checkout
ActiveRecord::Base.connection_pool.remove(extra_connection)
assert_equal ActiveRecord::Base.connection, old_connection
end
private
def add_record(name)
ActiveRecord::Base.connection_pool.with_connection { Project.create! :name => name }
end
end unless in_memory_db?