require 'spec_helper'
require 'puppet/daemon'
require 'puppet/agent'

def without_warnings
  flag = $VERBOSE
  $VERBOSE = nil
  yield
  $VERBOSE = flag
end

class TestClient
  def lockfile_path
    "/dev/null"
  end
end

describe Puppet::Daemon, :unless => Puppet.features.microsoft_windows? do
  include PuppetSpec::Files

  class RecordingScheduler
    attr_reader :jobs

    def run_loop(jobs)
      @jobs = jobs
    end
  end

  let(:agent) { Puppet::Agent.new(TestClient.new, false) }
  let(:server) { double("Server", :start => nil, :wait_for_shutdown => nil) }

  let(:pidfile) { double("PidFile", :lock => true, :unlock => true, :file_path => 'fake.pid') }
  let(:scheduler) { RecordingScheduler.new }

  let(:daemon) { Puppet::Daemon.new(pidfile, scheduler) }

  before do
    allow(daemon).to receive(:close_streams).and_return(nil)
  end

  it "should reopen the Log logs when told to reopen logs" do
    expect(Puppet::Util::Log).to receive(:reopen)
    daemon.reopen_logs
  end

  describe "when setting signal traps" do
    [:INT, :TERM].each do |signal|
      it "logs a notice and exits when sent #{signal}" do
        allow(Signal).to receive(:trap).with(signal).and_yield
        expect(Puppet).to receive(:notice).with("Caught #{signal}; exiting")
        expect(daemon).to receive(:stop)

        daemon.set_signal_traps
      end
    end

    {:HUP => :restart, :USR1 => :reload, :USR2 => :reopen_logs}.each do |signal, method|
      it "logs a notice and remembers to call #{method} when it receives #{signal}" do
        allow(Signal).to receive(:trap).with(signal).and_yield
        expect(Puppet).to receive(:notice).with("Caught #{signal}; storing #{method}")

        daemon.set_signal_traps

        expect(daemon.signals).to eq([method])
      end
    end
  end

  describe "when starting" do
    before do
      allow(daemon).to receive(:set_signal_traps)
    end

    it "should fail if it has neither agent nor server" do
      expect { daemon.start }.to raise_error(Puppet::DevError)
    end

    it "should create its pidfile" do
      expect(pidfile).to receive(:lock).and_return(true)

      daemon.agent = agent
      daemon.start
    end

    it "should fail if it cannot lock" do
      expect(pidfile).to receive(:lock).and_return(false)
      daemon.agent = agent

      expect { daemon.start }.to raise_error(RuntimeError, "Could not create PID file: #{pidfile.file_path}")
    end

    it "should start its server if one is configured" do
      daemon.server = server

      expect(server).to receive(:start)

      daemon.start
    end

    it "disables the reparse of configs if the filetimeout is 0" do
      Puppet[:filetimeout] = 0
      daemon.agent = agent

      daemon.start

      expect(scheduler.jobs[0]).not_to be_enabled
    end

    it "disables the agent run when there is no agent" do
      Puppet[:filetimeout] = 0
      daemon.server = server

      daemon.start

      expect(scheduler.jobs[1]).not_to be_enabled
    end

    it "waits for the server to shutdown when there is one" do
      daemon.server = server

      expect(server).to receive(:wait_for_shutdown)

      daemon.start
    end

    it "waits for the server to shutdown when there is one" do
      daemon.server = server

      expect(server).to receive(:wait_for_shutdown)

      daemon.start
    end
  end

  describe "when stopping" do
    before do
      allow(Puppet::Util::Log).to receive(:close_all)
      # to make the global safe to mock, set it to a subclass of itself,
      # then restore it in an after pass
      without_warnings { Puppet::Application = Class.new(Puppet::Application) }
    end

    after do
      # restore from the superclass so we lose the stub garbage
      without_warnings { Puppet::Application = Puppet::Application.superclass }
    end

    it "should stop its server if one is configured" do
      expect(server).to receive(:stop)

      daemon.server = server

      expect { daemon.stop }.to exit_with 0
    end

    it 'should request a stop from Puppet::Application' do
      expect(Puppet::Application).to receive(:stop!)
      expect { daemon.stop }.to exit_with 0
    end

    it "should remove its pidfile" do
      expect(pidfile).to receive(:unlock)

      expect { daemon.stop }.to exit_with 0
    end

    it "should close all logs" do
      expect(Puppet::Util::Log).to receive(:close_all)
      expect { daemon.stop }.to exit_with 0
    end

    it "should exit unless called with ':exit => false'" do
      expect { daemon.stop }.to exit_with 0
    end

    it "should not exit if called with ':exit => false'" do
      daemon.stop :exit => false
    end
  end

  describe "when reloading" do
    it "should do nothing if no agent is configured" do
      daemon.reload
    end

    it "should do nothing if the agent is running" do
      expect(agent).to receive(:run).with({:splay => false}).and_raise(Puppet::LockError, 'Failed to aquire lock')
      expect(Puppet).to receive(:notice).with('Not triggering already-running agent')

      daemon.agent = agent

      daemon.reload
    end

    it "should run the agent if one is available and it is not running" do
      expect(agent).to receive(:run).with({:splay => false})
      expect(Puppet).not_to receive(:notice).with('Not triggering already-running agent')

      daemon.agent = agent

      daemon.reload
    end
  end

  describe "when restarting" do
    before do
      without_warnings { Puppet::Application = Class.new(Puppet::Application) }
    end

    after do
      without_warnings { Puppet::Application = Puppet::Application.superclass }
    end

    it 'should set Puppet::Application.restart!' do
      expect(Puppet::Application).to receive(:restart!)
      allow(daemon).to receive(:reexec)
      daemon.restart
    end

    it "should reexec itself if no agent is available" do
      expect(daemon).to receive(:reexec)

      daemon.restart
    end

    it "should reexec itself if the agent is not running" do
      daemon.agent = agent
      expect(daemon).to receive(:reexec)

      daemon.restart
    end
  end

  describe "when reexecing it self" do
    before do
      allow(daemon).to receive(:exec)
      allow(daemon).to receive(:stop)
    end

    it "should fail if no argv values are available" do
      expect(daemon).to receive(:argv).and_return(nil)
      expect { daemon.reexec }.to raise_error(Puppet::DevError)
    end

    it "should shut down without exiting" do
      daemon.argv = %w{foo}
      expect(daemon).to receive(:stop).with(:exit => false)

      daemon.reexec
    end

    it "should call 'exec' with the original executable and arguments" do
      daemon.argv = %w{foo}
      expect(daemon).to receive(:exec).with($0 + " foo")

      daemon.reexec
    end
  end
end