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require "cases/helper"
module ActiveRecord
module ConnectionAdapters
class ConnectionPoolTest < ActiveRecord::TestCase
def setup
# Keep a duplicate pool so we do not bother others
@pool = ConnectionPool.new ActiveRecord::Base.connection_pool.spec
if in_memory_db?
# Separate connections to an in-memory database create an entirely new database,
# with an empty schema etc, so we just stub out this schema on the fly.
@pool.with_connection do |connection|
connection.create_table :posts do |t|
t.integer :cololumn
end
end
end
end
def test_active_connection?
assert !@pool.active_connection?
assert @pool.connection
assert @pool.active_connection?
@pool.release_connection
assert !@pool.active_connection?
end
def test_clear_stale_cached_connections!
pool = ConnectionPool.new ActiveRecord::Base.connection_pool.spec
threads = [
Thread.new { pool.connection },
Thread.new { pool.connection }]
threads.map { |t| t.join }
pool.extend Module.new {
attr_accessor :checkins
def checkin conn
@checkins << conn
conn.object_id
end
}
pool.checkins = []
cleared_threads = pool.clear_stale_cached_connections!
assert((cleared_threads - threads.map { |x| x.object_id }).empty?,
"threads should have been removed")
assert_equal pool.checkins.length, threads.length
end
def test_checkout_behaviour
pool = ConnectionPool.new ActiveRecord::Base.connection_pool.spec
connection = pool.connection
assert_not_nil connection
threads = []
4.times do |i|
threads << Thread.new(i) do |pool_count|
connection = pool.connection
assert_not_nil connection
end
end
threads.each {|t| t.join}
Thread.new do
threads.each do |t|
thread_ids = pool.instance_variable_get(:@reserved_connections).keys
assert thread_ids.include?(t.object_id)
end
pool.connection
threads.each do |t|
thread_ids = pool.instance_variable_get(:@reserved_connections).keys
assert !thread_ids.include?(t.object_id)
end
end.join()
end
def test_automatic_reconnect=
pool = ConnectionPool.new ActiveRecord::Base.connection_pool.spec
assert pool.automatic_reconnect
assert pool.connection
pool.disconnect!
assert pool.connection
pool.disconnect!
pool.automatic_reconnect = false
assert_raises(ConnectionNotEstablished) do
pool.connection
end
assert_raises(ConnectionNotEstablished) do
pool.with_connection
end
end
def test_pool_sets_connection_visitor
assert @pool.connection.visitor.is_a?(Arel::Visitors::ToSql)
end
end
end
end
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