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module ActiveSupport
module Testing
module Isolation
require 'thread'
def self.included(klass) #:nodoc:
klass.class_eval do
parallelize_me!
end
end
def self.forking_env?
!ENV["NO_FORK"] && Process.respond_to?(:fork)
end
@@class_setup_mutex = Mutex.new
def _run_class_setup # class setup method should only happen in parent
@@class_setup_mutex.synchronize do
unless defined?(@@ran_class_setup) || ENV['ISOLATION_TEST']
self.class.setup if self.class.respond_to?(:setup)
@@ran_class_setup = true
end
end
end
def run
serialized = run_in_isolation do
super
end
Marshal.load(serialized)
end
module Forking
def run_in_isolation(&blk)
read, write = IO.pipe
read.binmode
write.binmode
pid = fork do
read.close
yield
write.puts [Marshal.dump(self.dup)].pack("m")
exit!
end
write.close
result = read.read
Process.wait2(pid)
return result.unpack("m")[0]
end
end
module Subprocess
ORIG_ARGV = ARGV.dup unless defined?(ORIG_ARGV)
# Crazy H4X to get this working in windows / jruby with
# no forking.
def run_in_isolation(&blk)
require "tempfile"
if ENV["ISOLATION_TEST"]
yield
File.open(ENV["ISOLATION_OUTPUT"], "w") do |file|
file.puts [Marshal.dump(self.dup)].pack("m")
end
exit!
else
Tempfile.open("isolation") do |tmpfile|
env = {
'ISOLATION_TEST' => self.class.name,
'ISOLATION_OUTPUT' => tmpfile.path
}
load_paths = $-I.map {|p| "-I\"#{File.expand_path(p)}\"" }.join(" ")
orig_args = ORIG_ARGV.join(" ")
test_opts = "-n#{self.class.name}##{self.name}"
command = "#{Gem.ruby} #{load_paths} #{$0} '#{orig_args}' #{test_opts}"
# IO.popen lets us pass env in a cross-platform way
child = IO.popen(env, command)
begin
Process.wait(child.pid)
rescue Errno::ECHILD # The child process may exit before we wait
nil
end
return tmpfile.read.unpack("m")[0]
end
end
end
end
include forking_env? ? Forking : Subprocess
end
end
end
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