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require "cases/helper"
module ActiveRecord
module ConnectionAdapters
class ConnectionPoolTest < ActiveRecord::TestCase
attr_reader :pool
def setup
super
# 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 teardown
super
@pool.disconnect!
end
def active_connections(pool)
pool.connections.find_all(&:in_use?)
end
def test_checkout_after_close
connection = pool.connection
assert connection.in_use?
connection.close
assert !connection.in_use?
assert pool.connection.in_use?
end
def test_released_connection_moves_between_threads
thread_conn = nil
Thread.new {
pool.with_connection do |conn|
thread_conn = conn
end
}.join
assert thread_conn
Thread.new {
pool.with_connection do |conn|
assert_equal thread_conn, conn
end
}.join
end
def test_with_connection
assert_equal 0, active_connections(pool).size
main_thread = pool.connection
assert_equal 1, active_connections(pool).size
Thread.new {
pool.with_connection do |conn|
assert conn
assert_equal 2, active_connections(pool).size
end
assert_equal 1, active_connections(pool).size
}.join
main_thread.close
assert_equal 0, active_connections(pool).size
end
def test_active_connection_in_use
assert !pool.active_connection?
main_thread = pool.connection
assert pool.active_connection?
main_thread.close
assert !pool.active_connection?
end
def test_full_pool_exception
assert_raises(PoolFullError) do
(@pool.size + 1).times do
@pool.checkout
end
end
end
def test_full_pool_blocks
cs = @pool.size.times.map { @pool.checkout }
t = Thread.new { @pool.checkout }
# make sure our thread is in the timeout section
Thread.pass until t.status == "sleep"
connection = cs.first
connection.close
assert_equal connection, t.join.value
end
def test_removing_releases_latch
cs = @pool.size.times.map { @pool.checkout }
t = Thread.new { @pool.checkout }
# make sure our thread is in the timeout section
Thread.pass until t.status == "sleep"
connection = cs.first
@pool.remove connection
assert_respond_to t.join.value, :execute
end
def test_reap_and_active
@pool.checkout
@pool.checkout
@pool.checkout
@pool.dead_connection_timeout = 0
connections = @pool.connections.dup
@pool.reap
assert_equal connections.length, @pool.connections.length
end
def test_reap_inactive
@pool.checkout
@pool.checkout
@pool.checkout
@pool.dead_connection_timeout = 0
connections = @pool.connections.dup
connections.each do |conn|
conn.extend(Module.new { def active?; false; end; })
end
@pool.reap
assert_equal 0, @pool.connections.length
ensure
connections.each(&:close)
end
def test_remove_connection
conn = @pool.checkout
assert conn.in_use?
length = @pool.connections.length
@pool.remove conn
assert conn.in_use?
assert_equal(length - 1, @pool.connections.length)
ensure
conn.close
end
def test_remove_connection_for_thread
conn = @pool.connection
@pool.remove conn
assert_not_equal(conn, @pool.connection)
ensure
conn.close if conn
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_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
connection.close
end
end
threads.each(&:join)
Thread.new do
assert pool.connection
pool.connection.close
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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