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require 'rbconfig'
module ActiveSupport
module Testing
class RemoteError < StandardError
attr_reader :message, :backtrace
def initialize(exception)
@message = "caught #{exception.class.name}: #{exception.message}"
@backtrace = exception.backtrace
end
end
class ProxyTestResult
def initialize
@calls = []
end
def add_error(e)
e = Test::Unit::Error.new(e.test_name, RemoteError.new(e.exception))
@calls << [:add_error, e]
end
def __replay__(result)
@calls.each do |name, args|
result.send(name, *args)
end
end
def method_missing(name, *args)
@calls << [name, args]
end
end
module Isolation
require 'thread'
class ParallelEach
include Enumerable
# default to 2 cores
CORES = (ENV['TEST_CORES'] || 2).to_i
def initialize list
@list = list
@queue = SizedQueue.new CORES
end
def grep pattern
self.class.new super
end
def each
threads = CORES.times.map {
Thread.new {
while job = @queue.pop
yield job
end
}
}
@list.each { |i| @queue << i }
CORES.times { @queue << nil }
threads.each(&:join)
end
end
def self.included klass
klass.extend(Module.new {
def test_methods
ParallelEach.new super
end
})
end
def self.forking_env?
!ENV["NO_FORK"] && ((RbConfig::CONFIG['host_os'] !~ /mswin|mingw/) && (RUBY_PLATFORM !~ /java/))
end
def _run_class_setup # class setup method should only happen in parent
unless defined?(@@ran_class_setup) || ENV['ISOLATION_TEST']
self.class.setup if self.class.respond_to?(:setup)
@@ran_class_setup = true
end
end
def run(runner)
_run_class_setup
serialized = run_in_isolation do |isolated_runner|
super(isolated_runner)
end
retval, proxy = Marshal.load(serialized)
proxy.__replay__(runner)
retval
end
module Forking
def run_in_isolation(&blk)
read, write = IO.pipe
pid = fork do
read.close
proxy = ProxyTestResult.new
retval = yield proxy
write.puts [Marshal.dump([retval, proxy])].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"]
proxy = ProxyTestResult.new
retval = yield proxy
File.open(ENV["ISOLATION_OUTPUT"], "w") do |file|
file.puts [Marshal.dump([retval, proxy])].pack("m")
end
exit!
else
Tempfile.open("isolation") do |tmpfile|
ENV["ISOLATION_TEST"] = @method_name
ENV["ISOLATION_OUTPUT"] = tmpfile.path
load_paths = $-I.map {|p| "-I\"#{File.expand_path(p)}\"" }.join(" ")
`#{Gem.ruby} #{load_paths} #{$0} #{ORIG_ARGV.join(" ")} -t\"#{self.class}\"`
ENV.delete("ISOLATION_TEST")
ENV.delete("ISOLATION_OUTPUT")
return tmpfile.read.unpack("m")[0]
end
end
end
end
include forking_env? ? Forking : Subprocess
end
end
end
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