Add bin and edit workflow

bin/gems/ethon-0.16.0/spec/support/localhost_server.rb

@@ -0,0 +1,95 @@
+# frozen_string_literal: true
+require 'rack'
+require 'rack/handler/webrick'
+require 'net/http'
+
+# The code for this is inspired by Capybara's server:
+#   http://github.com/jnicklas/capybara/blob/0.3.9/lib/capybara/server.rb
+class LocalhostServer
+  READY_MESSAGE = "Server ready"
+
+  class Identify
+    def initialize(app)
+      @app = app
+    end
+
+    def call(env)
+      if env["PATH_INFO"] == "/__identify__"
+        [200, {}, [LocalhostServer::READY_MESSAGE]]
+      else
+        @app.call(env)
+      end
+    end
+  end
+
+  attr_reader :port
+
+  def initialize(rack_app, port = nil)
+    @port = port || find_available_port
+    @rack_app = rack_app
+    concurrently { boot }
+    wait_until(10, "Boot failed.") { booted? }
+  end
+
+  private
+
+  def find_available_port
+    server = TCPServer.new('127.0.0.1', 0)
+    server.addr[1]
+  ensure
+    server.close if server
+  end
+
+  def boot
+    # Use WEBrick since it's part of the ruby standard library and is available on all ruby interpreters.
+    options = { :Port => port }
+    options.merge!(:AccessLog => [], :Logger => WEBrick::BasicLog.new(StringIO.new)) unless ENV['VERBOSE_SERVER']
+    Rack::Handler::WEBrick.run(Identify.new(@rack_app), **options)
+  end
+
+  def booted?
+    res = ::Net::HTTP.get_response("localhost", '/__identify__', port)
+    if res.is_a?(::Net::HTTPSuccess) or res.is_a?(::Net::HTTPRedirection)
+      return res.body == READY_MESSAGE
+    end
+  rescue Errno::ECONNREFUSED, Errno::EBADF
+    return false
+  end
+
+  def concurrently
+    if should_use_subprocess?
+      pid = Process.fork do
+        trap(:INT) { ::Rack::Handler::WEBrick.shutdown }
+        yield
+        exit # manually exit; otherwise this sub-process will re-run the specs that haven't run yet.
+      end
+
+      at_exit do
+        Process.kill('INT', pid)
+        begin
+          Process.wait(pid)
+        rescue Errno::ECHILD
+          # ignore this error...I think it means the child process has already exited.
+        end
+      end
+    else
+      Thread.new { yield }
+    end
+  end
+
+  def should_use_subprocess?
+    # !ENV['THREADED']
+    false
+  end
+
+  def wait_until(timeout, error_message, &block)
+    start_time = Time.now
+
+    while true
+      return if yield
+      raise TimeoutError.new(error_message) if (Time.now - start_time) > timeout
+      sleep(0.05)
+    end
+  end
+end
+