Add instance#to_json and #as_json for serialization.

Author: ioquatix

fixtures/async/container/a_container.rb

@@ -87,6 +87,27 @@ module Container
 				expect(input.read).to be == "true"
 			end
 
+			with "instance" do
+				it "can generate JSON representation" do
+					IO.pipe do |input, output|
+						container.spawn do |instance|
+							output.write(instance.to_json)
+						end
+						
+						container.wait
+					
+						expect(container.statistics).to have_attributes(failures: be == 0)
+						
+						output.close
+						instance = JSON.parse(input.read, symbolize_names: true)
+						expect(instance).to have_keys(
+							process_id: be_a(Integer),
+							name: be_a(String),
+						)
+					end
+				end
+			end
+			
 			with "#sleep" do
 				it "can sleep for a short time" do
 					container.spawn do

lib/async/container/forked.rb

@@ -41,12 +41,24 @@ def initialize(io)
 						@name = nil
 					end
 
+					def as_json(...)
+						{
+							process_id: ::Process.pid,
+							name: @name,
+						}
+					end
+					
+					def to_json(...)
+						as_json.to_json(...)
+					end
+					
 					# Set the process title to the specified value.
 					# @parameter value [String] The name of the process.
 					def name= value
-						if @name = value
-							::Process.setproctitle(@name)
-						end
+						@name = value
+						
+						# This sets the process title to an empty string if the name is nil:
+						::Process.setproctitle(@name.to_s)
 					end
 
 					# The name of the process.

lib/async/container/threaded.rb

@@ -53,12 +53,23 @@ def self.for(thread)
 					end
 
 					def initialize(io)
-						@name = nil
 						@thread = ::Thread.current
 
 						super
 					end
 
+					def as_json(...)
+						{
+							process_id: ::Process.pid,
+							thread_id: @thread.object_id,
+							name: @thread.name,
+						}
+					end
+					
+					def to_json(...)
+						as_json.to_json(...)
+					end
+					
 					# Set the name of the thread.
 					# @parameter value [String] The name to set.
 					def name= value