Problematic spec

test2.rb

$stdout.sync = true
$stderr.sync = true

require "socket"
require "timeout"

module PortProber
  module_function

  def random(host)
    server = TCPServer.new(host, 0)
    port   = server.addr[1]

    port
  ensure
    server&.close
  end

  def port_open?(ip, port)
    TCPSocket.new(ip, port).close
    true
  rescue Errno::ECONNREFUSED, Errno::ECONNRESET
    false
  end

  def localhost
    info = Socket.getaddrinfo("localhost",
                              80,
                              Socket::AF_INET,
                              Socket::SOCK_STREAM)

    raise "unable to translate 'localhost' for TCP + IPv4" if info.empty?

    info[0][3]
  end
end

# puts $PID
# puts %x`ps -p #{$PID}`

ip   = PortProber.localhost
port = PortProber.random(ip)

puts "#{ip}:#{port}"

env = { "PORT" => port.to_s }
command = "bundle exec puma -C config/puma.rb"
r_out, w_out = IO.pipe
pid = Process.spawn(env, command, out: w_out, err: "/dev/null")
Process.detach(pid)

def running?(pid)
  Process.getpgid(pid)
  true
rescue Errno::ESRCH # No such process
  false
end

def not_running_or_port_open?(pid, ip, port)
  not_running = !running?(pid)
  port_open   = PortProber.port_open?(ip, port)

  not_running || port_open
end

sleep 0.01 until not_running_or_port_open?(pid, ip, port)

puts running?(pid)

# puts pid
# puts %x`ps -p #{pid}`

begin
  Process.kill(:INT, pid)
  Process.wait(pid)
rescue Errno::ESRCH, Errno::ECHILD
end

[r_out, w_out].each(&:close)

puts
puts %x`ps aux | grep puma ; ps aux | grep ruby`

~/twingly/ruby/seikan fail-if-test-db-not-removed*
$ ruby test2.rb
127.0.0.1:52069
true

dentarg          72470   0.0  0.0  2442020   1988 s006  S+    6:04PM   0:00.00 grep puma
dentarg          72468   0.0  0.0  2442612   2308 s006  S+    6:04PM   0:00.00 sh -c ps aux | grep puma ; ps aux | grep ruby
dentarg          72465   0.0  0.1  2554616  25544 s006  S+    6:04PM   0:00.03 puma: cluster worker 0: 72459 [seikan]
dentarg          72458   1.2  0.0  2466608   9868 s006  S+    6:04PM   0:00.07 ruby test2.rb
dentarg          72468   1.0  0.0  2443636   2320 s006  S+    6:04PM   0:00.00 sh -c ps aux | grep puma ; ps aux | grep ruby
dentarg          72472   0.0  0.0  2432804   1964 s006  S+    6:04PM   0:00.00 grep ruby

~/twingly/ruby/seikan fail-if-test-db-not-removed*
$ kill 72465

~/twingly/ruby/seikan fail-if-test-db-not-removed*
$ ruby test2.rb
127.0.0.1:52169
true

dentarg          72654   0.0  0.0  2442020   1984 s006  S+    6:04PM   0:00.00 grep puma
dentarg          72652   0.0  0.0  2443636   2328 s006  S+    6:04PM   0:00.00 sh -c ps aux | grep puma ; ps aux | grep ruby
dentarg          72649   0.0  0.1  2551544  25320 s006  S+    6:04PM   0:00.03 puma: cluster worker 1: 72642 [seikan]
dentarg          72648   0.0  0.1  2551544  25272 s006  S+    6:04PM   0:00.03 puma: cluster worker 0: 72642 [seikan]
dentarg          72641   1.5  0.0  2466608   9836 s006  S+    6:04PM   0:00.07 ruby test2.rb
dentarg          72652   1.1  0.0  2444660   2340 s006  S+    6:04PM   0:00.00 sh -c ps aux | grep puma ; ps aux | grep ruby
dentarg          72658   0.0  0.0  2432804   1964 s006  S+    6:04PM   0:00.00 grep ruby