#code
def check_status
          if File.exist?(PID_FILE)
            pid = File.read(PID_FILE).to_i
            check_pid_status(pid) if pid > 0
            File.delete(PID_FILE)
          end
        end

        def check_pid_status(pid)
          Process.kill(0, pid)
          puts "Process(#{pid}) is already running."
          exit(1)
        rescue Errno::ESERCH #do nothing, and continue with the script
        rescue Errno::EPERM
          puts "Process with pid=#{pid} is already running but is owned by a different user"
          exit(1)
        end

#test
require 'spec_helper'
require 'mirrorsyncdaemon'


RSpec.describe MirrorSyncDaemon do
  it 'deletes the PID_FILE if it exists but contains invalid PID' do
    stub_const("MirrorSyncDaemon::PID_FILE", File.open('test_file', ::File::CREAT|::File::TRUNC|::File::RDWR, 0644) { |f| f.write('123') } )
    @mirrorsyncdaemon = MirrorSyncDaemon.new
    @mirrorsyncdaemon.stub(:check_pid_status).with(Integer) { raise Errno::ESERCH }
    @mirrorsyncdaemon.check_status
    expect(MirrorSyncDaemon::PID_FILE).to_not exist
  end
end

#error
Failures:

  1) MirrorSyncDaemon deletes the PID_FILE if it exists but contains invalid PID
     Failure/Error: if File.exist?(PID_FILE)

     TypeError:
       no implicit conversion of Fixnum into String
     # ./lib/mirrorsyncdaemon.rb:124:in `exist?'
     # ./lib/mirrorsyncdaemon.rb:124:in `check_status'
     # ./spec/test_mirrorsyncdaemon.rb:10:in `block (2 levels) in <top (required)>'

Deprecation Warnings:

Using `stub` from rspec-mocks' old `:should` syntax without explicitly enabling the syntax is deprecated. Use the new `:expect` syntax or explicitly enable `:should` instead. Called from /home/mihaelkeehl/rise-chef-repo/cookbooks/mirror/files/default/scripts/spec/test_mirrorsyncdaemon.rb:9:in `block (2 levels) in <top (required)>'.


If you need more of the backtrace for any of these deprecations to
identify where to make the necessary changes, you can configure
`config.raise_errors_for_deprecations!`, and it will turn the
deprecation warnings into errors, giving you the full backtrace.

1 deprecation warning total

Finished in 0.00102 seconds (files took 0.12823 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/test_mirrorsyncdaemon.rb:6 # MirrorSyncDaemon deletes the PID_FILE if it exists but contains invalid PID