fix process#alive? to not raise on no such file

[god.git] / test / test_god.rb

require File.dirname(__FILE__) + '/helper'

class TestGod < Test::Unit::TestCase
  def setup
    Server.stubs(:new).returns(true)
    God.stubs(:setup).returns(true)
    God.stubs(:validater).returns(true)
    God.reset
  end
  
  def teardown
    Timer.get.timer.kill
  end
  
  # init
  
  def test_init_should_initialize_watches_to_empty_array
    God.init { }
    assert_equal Hash.new, God.watches
  end
  
  def test_init_should_abort_if_called_after_watch
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    assert_abort do
      God.init { }
    end
  end
  
  # pid_file_directory
  
  def test_pid_file_directory_should_return_default_if_not_set_explicitly
    God.init
    assert_equal '/var/run/god', God.pid_file_directory
  end
  
  def test_pid_file_directory_equals_should_set
    God.init
    God.pid_file_directory = '/foo'
    assert_equal '/foo', God.pid_file_directory
  end
  
  # watch
  
  def test_watch_should_get_stored
    watch = nil
    God.watch do |w|
      w.name = 'foo'
      w.start = 'bar'
      watch = w
    end
    
    assert_equal 1, God.watches.size
    assert_equal watch, God.watches.values.first
    
    assert_equal 0, God.groups.size
  end
  
  def test_watch_should_get_stored_in_pending_watches
    watch = nil
    God.watch do |w|
      w.name = 'foo'
      w.start = 'bar'
      watch = w
    end
    
    assert_equal 1, God.pending_watches.size
    assert_equal watch, God.pending_watches.first
  end
  
  def test_watch_should_register_processes
    assert_nil God.registry['foo']
    God.watch do |w|
      w.name = 'foo'
      w.start = 'bar'
    end
    assert_kind_of God::Process, God.registry['foo']
  end
  
  def test_watch_should_get_stored_by_group
    a = nil
    
    God.watch do |w|
      a = w
      w.name = 'foo'
      w.start = 'bar'
      w.group = 'test'
    end
    
    assert_equal({'test' => [a]}, God.groups)
  end
  
  def test_watches_should_get_stored_by_group
    a = nil
    b = nil
    
    God.watch do |w|
      a = w
      w.name = 'foo'
      w.start = 'bar'
      w.group = 'test'
    end
    
    God.watch do |w|
      b = w
      w.name = 'bar'
      w.start = 'baz'
      w.group = 'test'
    end
    
    assert_equal({'test' => [a, b]}, God.groups)
  end
      
  def test_watch_should_allow_multiple_watches
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    assert_nothing_raised do
      God.watch { |w| w.name = 'bar'; w.start = 'bar' }
    end
  end
  
  def test_watch_should_disallow_duplicate_watch_names
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    assert_abort do
      God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    end
  end
  
  def test_watch_should_disallow_identical_watch_and_group_names
    God.watch { |w| w.name = 'foo'; w.group = 'bar'; w.start = 'bar' }
    
    assert_abort do
      God.watch { |w| w.name = 'bar'; w.start = 'bar' }
    end
  end
  
  def test_watch_should_disallow_identical_watch_and_group_names_other_way
    God.watch { |w| w.name = 'bar'; w.start = 'bar' }
    
    assert_abort do
      God.watch { |w| w.name = 'foo'; w.group = 'bar'; w.start = 'bar' }
    end
  end
  
  def test_watch_should_unwatch_new_watch_if_running_and_duplicate_watch
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    God.running = true
    
    assert_nothing_raised do
      no_stdout do
        God.watch { |w| w.name = 'foo'; w.start = 'bar' }
      end
    end
  end
  
  # unwatch
  
  def test_unwatch_should_unmonitor_watch
    God.watch { |w| w.name = 'bar'; w.start = 'bar' }
    w = God.watches['bar']
    w.expects(:unmonitor)
    God.unwatch(w)
  end
  
  def test_unwatch_should_unregister_watch
    God.watch { |w| w.name = 'bar'; w.start = 'bar' }
    w = God.watches['bar']
    w.expects(:unregister!)
    no_stdout do
      God.unwatch(w)
    end
  end
  
  def test_unwatch_should_remove_same_name_watches
    God.watch { |w| w.name = 'bar'; w.start = 'bar' }
    w = God.watches['bar']
    no_stdout do
      God.unwatch(w)
    end
    assert_equal 0, God.watches.size
  end
  
  def test_unwatch_should_remove_from_group
    God.watch do |w|
      w.name = 'bar'
      w.start = 'baz'
      w.group = 'test'
    end
    w = God.watches['bar']
    no_stdout do
      God.unwatch(w)
    end
    assert !God.groups[w.group].include?(w)
  end
  
  # control
  
  def test_control_should_monitor_on_start
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    w = God.watches['foo']
    w.expects(:monitor)
    God.control('foo', 'start')
  end
  
  def test_control_should_move_to_restart_on_restart
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    w = God.watches['foo']
    w.expects(:move).with(:restart)
    God.control('foo', 'restart')
  end
  
  def test_control_should_unmonitor_and_stop_on_stop
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    w = God.watches['foo']
    w.expects(:unmonitor).returns(w)
    w.expects(:action).with(:stop)
    God.control('foo', 'stop')
  end
  
  def test_control_should_unmonitor_on_unmonitor
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    w = God.watches['foo']
    w.expects(:unmonitor).returns(w)
    God.control('foo', 'unmonitor')
  end
  
  def test_control_should_raise_on_invalid_command
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    assert_raise InvalidCommandError do
      God.control('foo', 'invalid')
    end
  end
  
  def test_control_should_operate_on_each_watch_in_group
    God.watch do |w|
      w.name = 'foo1'
      w.start = 'go'
      w.group = 'bar'
    end
    
    God.watch do |w|
      w.name = 'foo2'
      w.start = 'go'
      w.group = 'bar'
    end
    
    God.watches['foo1'].expects(:monitor)
    God.watches['foo2'].expects(:monitor)
    
    God.control('bar', 'start')
  end
  
  # stop_all
  
  # terminate
  
  def test_terminate_should_exit
    God.expects(:exit!).with(0)
    God.terminate
  end
  
  # status
  
  def test_status_should_show_state
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    w = God.watches['foo']
    w.state = :up
    assert_equal({'foo' => {:state => :up}}, God.status)
  end
  
  def test_status_should_show_unmonitored_for_nil_state
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    
    w = God.watches['foo']
    assert_equal({'foo' => {:state => :unmonitored}}, God.status)
  end
  
  # running_load
  
  def test_running_load_should_eval_code
    code = <<-EOF
      God.watch do |w|
        w.name = 'foo'
        w.start = 'go'
      end
    EOF
    
    no_stdout do
      God.running_load(code)
    end
    
    assert_equal 1, God.watches.size
  end
  
  def test_running_load_should_monitor_new_watches
    code = <<-EOF
      God.watch do |w|
        w.name = 'foo'
        w.start = 'go'
      end
    EOF
    
    Watch.any_instance.expects(:monitor)
    no_stdout do
      God.running_load(code)
    end
  end
  
  def test_running_load_should_not_monitor_new_watches_with_autostart_false
    code = <<-EOF
      God.watch do |w|
        w.name = 'foo'
        w.start = 'go'
        w.autostart = false
      end
    EOF
    
    Watch.any_instance.expects(:monitor).never
    no_stdout do
      God.running_load(code)
    end
  end
  
  def test_running_load_should_return_array_of_affected_watches
    code = <<-EOF
      God.watch do |w|
        w.name = 'foo'
        w.start = 'go'
      end
    EOF
    
    w = nil
    no_stdout do
      w = God.running_load(code)
    end
    assert_equal 1, w.size
    assert_equal 'foo', w.first.name
  end
  
  def test_running_load_should_clear_pending_watches
    code = <<-EOF
      God.watch do |w|
        w.name = 'foo'
        w.start = 'go'
      end
    EOF
    
    no_stdout do
      God.running_load(code)
    end
    assert_equal 0, God.pending_watches.size
  end
  
  # load
  
  def test_load_should_collect_and_load_globbed_path
    Dir.expects(:[]).with('/path/to/*.thing').returns(['a', 'b'])
    Kernel.expects(:load).with('a').once
    Kernel.expects(:load).with('b').once
    God.load('/path/to/*.thing')
  end
  
  # start
  
  def test_start_should_kick_off_a_server_instance
    Server.expects(:new).returns(true)
    God.start
  end
    
  def test_start_should_start_event_handler
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    Timer.any_instance.expects(:join)
    EventHandler.expects(:start).once
    no_stdout do
      God.start
    end
  end
  
  def test_start_should_begin_monitoring_autostart_watches
    God.watch do |w|
      w.name = 'foo'
      w.start = 'go'
    end
    
    Timer.any_instance.expects(:join)
    Watch.any_instance.expects(:monitor).once
    God.start
  end
  
  def test_start_should_not_begin_monitoring_non_autostart_watches
    God.watch do |w|
      w.name = 'foo'
      w.start = 'go'
      w.autostart = false
    end
    
    Timer.any_instance.expects(:join)
    Watch.any_instance.expects(:monitor).never
    God.start
  end
  
  def test_start_should_get_and_join_timer
    God.watch { |w| w.name = 'foo'; w.start = 'bar' }
    Timer.any_instance.expects(:join)
    no_stdout do
      God.start
    end
  end
  
  # at_exit
  
  def test_at_exit_should_call_start
    God.expects(:start).once
    God.at_exit_orig
  end
end


class TestGodOther < Test::Unit::TestCase
  def setup
    Server.stubs(:new).returns(true)
    God.internal_init
    God.reset
  end
  
  def teardown
    Timer.get.timer.kill
  end
  
  # setup
  
  def test_setup_should_create_pid_file_directory_if_it_doesnt_exist
    God.expects(:test).returns(false)
    FileUtils.expects(:mkdir_p).with(God.pid_file_directory)
    God.setup
  end
  
  def test_setup_should_raise_if_no_permissions_to_create_pid_file_directory
    God.expects(:test).returns(false)
    FileUtils.expects(:mkdir_p).raises(Errno::EACCES)
    
    assert_abort do
      God.setup
    end
  end
  
  # validate
    
  def test_validate_should_abort_if_pid_file_directory_is_unwriteable
    God.expects(:test).returns(false)
    assert_abort do
      God.validater
    end
  end
  
  def test_validate_should_not_abort_if_pid_file_directory_is_writeable
    God.expects(:test).returns(true)
    assert_nothing_raised do
      God.validater
    end
  end
end