spawn_manager_spec.rb

require 'support/config'
require 'support/test_helper'
require 'passenger/spawn_manager'

require 'ruby/abstract_server_spec'
require 'ruby/rails/minimal_spawner_spec'
require 'ruby/rails/spawner_privilege_lowering_spec'
require 'ruby/rails/spawner_error_handling_spec'
include Passenger
include Passenger::Utils

# TODO: test whether SpawnManager restarts FrameworkSpawner if it crashed

describe SpawnManager do
	include TestHelper
	
	before :each do
		@manager = SpawnManager.new
		@stub = setup_rails_stub('foobar')
		@stub.use_vendor_rails('minimal')
		@server = @manager
		@server.start
	end
	
	after :each do
		@manager.cleanup
		@stub.destroy
	end
	
	describe "smart spawning" do
		before :each do
			@spawn_method = "smart"
		end
		
		it_should_behave_like "AbstractServer"
	end
	
	describe "conservative spawning" do
		before :each do
			@spawn_method = "conservative"
		end
		
		it_should_behave_like "AbstractServer"
	end
	
	def spawn_arbitrary_application
		@manager.spawn_application(@stub.app_root, true, "nobody",
			"production", @spawn_method)
	end
end

describe SpawnManager do
	include TestHelper
	
	before :each do
		@manager = SpawnManager.new
		@stub = setup_rails_stub('foobar')
		@stub.use_vendor_rails('minimal')
	end
	
	after :each do
		@manager.cleanup
		@stub.destroy
	end
	
	it "can spawn when the server's not running" do
		app = @manager.spawn_application(@stub.app_root)
		app.close
	end
	
	it "can spawn when the server's running synchronously" do
		a, b = UNIXSocket.pair
		pid = fork do
			begin
				a.close
				sleep(1) # Give @manager the chance to start.
				channel = MessageChannel.new(b)
				channel.write("spawn_application", @stub.app_root, "true",
					"nobody", "production", "smart", "rails")
				channel.read
				pid, listen_socket = channel.read
				channel.recv_io.close
				channel.close
			rescue Exception => e
				print_exception("child", e)
			ensure
				exit!
			end
		end
		b.close
		@manager.start_synchronously(a)
		a.close
		Process.waitpid(pid) rescue nil
	end
	
	it "doesn't crash upon spawning an application that doesn't specify its Rails version" do
		File.write(@stub.environment_rb) do |content|
			content.sub(/^RAILS_GEM_VERSION = .*$/, '')
		end
		@stub.dont_use_vendor_rails
		@manager.spawn_application(@stub.app_root).close
	end
	
	it "properly reloads applications that do not specify a Rails version" do
		File.write(@stub.environment_rb) do |content|
			content.sub(/^RAILS_GEM_VERSION = .*$/, '')
		end
		@stub.dont_use_vendor_rails
		@manager.reload(@stub.app_root)
		spawners = @manager.instance_eval { @spawners }
		spawners.should be_empty
	end
end

describe SpawnManager do
	include TestHelper

	it "can spawn a Rack application" do
		use_stub('rack') do |stub|
			@manager = SpawnManager.new
			app = @manager.spawn_application(stub.app_root, true,
				"nobody", "production", "smart", "rack")
			app.close
		end
	end
end

describe SpawnManager do
	include TestHelper
	
	before :each do
		@spawn_method = "smart"
	end
	
	describe "smart spawning" do
		it_should_behave_like "a minimal spawner"
	end
	
	describe "conservative spawning" do
		before :each do
			@spawn_method = "conservative"
		end
		
		it_should_behave_like "a minimal spawner"
	end
	
	it_should_behave_like "handling errors in application initialization"
	it_should_behave_like "handling errors in framework initialization"
	
	def spawn_stub_application(stub)
		spawner = SpawnManager.new
		begin
			return spawner.spawn_application(stub.app_root, true,
				"nobody", "production", @spawn_method)
		ensure
			spawner.cleanup
		end
	end
	
	def load_nonexistant_framework
		# Prevent detect_framework_version from raising VersionNotFound
		Application.instance_eval do
			alias orig_detect_framework_version detect_framework_version
			def detect_framework_version(app_root)
				return "1.9.827"
			end
		end
		begin
			File.write(@stub.environment_rb, "RAILS_GEM_VERSION = '1.9.827'")
			@stub.dont_use_vendor_rails
			return spawn_stub_application(@stub)
		ensure
			Application.instance_eval do
				alias detect_framework_version orig_detect_framework_version
			end
		end
	end
end