#! /usr/bin/env ruby
#
# Unit testing for the Init service Provider
#

require 'spec_helper'

describe Puppet::Type.type(:service).provider(:init) do

  let :provider do
    provider = described_class.new(:name => 'myservice')
    provider.resource = resource
    provider
  end

  let :resource do
    Puppet::Type.type(:service).new(
      :name     => 'myservice',
      :ensure   => :running,
      :path     => paths
    )
  end

  let :paths do
    ["/service/path","/alt/service/path"]
  end

  let :excludes do
    # Taken from redhat, gentoo, and debian
    %w{functions.sh reboot.sh shutdown.sh functions halt killall single linuxconf reboot boot wait-for-state rcS module-init-tools}
  end

  describe "when getting all service instances" do
    before :each do
      described_class.stubs(:defpath).returns('tmp')

      @services = ['one', 'two', 'three', 'four']
      Dir.stubs(:entries).with('tmp').returns @services
      FileTest.expects(:directory?).with('tmp').returns(true)
      FileTest.stubs(:executable?).returns(true)
    end

    it "should return instances for all services" do
      described_class.instances.map(&:name).should == @services
    end

    it "should omit an array of services from exclude list" do
      exclude = ['two', 'four']
      described_class.get_services(described_class.defpath, exclude).map(&:name).should == (@services - exclude)
    end

    it "should omit a single service from the exclude list" do
      exclude = 'two'
      described_class.get_services(described_class.defpath, exclude).map(&:name).should == @services - [exclude]
    end

    it "should use defpath" do
      described_class.instances.should be_all { |provider| provider.get(:path) == described_class.defpath }
    end

    it "should set hasstatus to true for providers" do
      described_class.instances.should be_all { |provider| provider.get(:hasstatus) == true }
    end

    it "should discard upstart jobs" do
      not_init_service, *valid_services = @services
      File.stubs(:symlink?).returns false
      File.stubs(:symlink?).with("tmp/#{not_init_service}").returns(true)
      File.stubs(:readlink).with("tmp/#{not_init_service}").returns("/lib/init/upstart-job")

      described_class.instances.map(&:name).should == valid_services
    end

    it "should discard non-initscript scripts" do
      valid_services = @services
      all_services = valid_services + excludes
      Dir.expects(:entries).with('tmp').returns all_services
      described_class.instances.map(&:name).should =~ valid_services
    end
  end

  describe "when checking valid paths" do
    it "should discard paths that do not exist" do
      File.expects(:directory?).with(paths[0]).returns false
      File.expects(:exist?).with(paths[0]).returns false
      File.expects(:directory?).with(paths[1]).returns true

      provider.paths.should == [paths[1]]
    end

    it "should discard paths that are not directories" do
      paths.each do |path|
        File.expects(:exist?).with(path).returns true
        File.expects(:directory?).with(path).returns false
      end
      provider.paths.should be_empty
    end
  end

  describe "when searching for the init script" do
    before :each do
      paths.each {|path| File.expects(:directory?).with(path).returns true }
    end

    it "should be able to find the init script in the service path" do
      File.expects(:stat).with("#{paths[0]}/myservice").returns true
      File.expects(:stat).with("#{paths[1]}/myservice").never # first one wins
      provider.initscript.should == "/service/path/myservice"
    end

    it "should be able to find the init script in an alternate service path" do
      File.expects(:stat).with("#{paths[0]}/myservice").raises Errno::ENOENT, "No such file or directory - #{paths[0]}/myservice"
      File.expects(:stat).with("#{paths[1]}/myservice").returns true
      provider.initscript.should == "/alt/service/path/myservice"
    end

    it "should be able to find the init script if it ends with .sh" do
      File.expects(:stat).with("#{paths[0]}/myservice").raises Errno::ENOENT, "No such file or directory - #{paths[0]}/myservice"
      File.expects(:stat).with("#{paths[1]}/myservice").raises Errno::ENOENT, "No such file or directory - #{paths[1]}/myservice"
      File.expects(:stat).with("#{paths[0]}/myservice.sh").returns true
      provider.initscript.should == "/service/path/myservice.sh"
    end

    it "should fail if the service isn't there" do
      paths.each do |path|
        File.expects(:stat).with("#{path}/myservice").raises Errno::ENOENT, "No such file or directory - #{path}/myservice"
        File.expects(:stat).with("#{path}/myservice.sh").raises Errno::ENOENT, "No such file or directory - #{path}/myservice.sh"
      end
      expect { provider.initscript }.to raise_error(Puppet::Error, "Could not find init script for 'myservice'")
    end
  end

  describe "if the init script is present" do
    before :each do
      File.stubs(:directory?).with("/service/path").returns true
      File.stubs(:directory?).with("/alt/service/path").returns true
      File.stubs(:stat).with("/service/path/myservice").returns true
    end

    [:start, :stop, :status, :restart].each do |method|
      it "should have a #{method} method" do
        provider.should respond_to(method)
      end
      describe "when running #{method}" do

        it "should use any provided explicit command" do
          resource[method] = "/user/specified/command"
          provider.expects(:execute).with { |command, *args| command == ["/user/specified/command"] }
          provider.send(method)
        end

        it "should pass #{method} to the init script when no explicit command is provided" do
          resource[:hasrestart] = :true
          resource[:hasstatus] = :true
          provider.expects(:execute).with { |command, *args| command ==  ["/service/path/myservice",method]}
          provider.send(method)
        end
      end
    end

    describe "when checking status" do
      describe "when hasstatus is :true" do
        before :each do
          resource[:hasstatus] = :true
        end
        it "should execute the command" do
          provider.expects(:texecute).with(:status, ['/service/path/myservice', :status], false).returns("")
          provider.status
        end
        it "should consider the process running if the command returns 0" do
          provider.expects(:texecute).with(:status, ['/service/path/myservice', :status], false).returns("")
          $CHILD_STATUS.stubs(:exitstatus).returns(0)
          provider.status.should == :running
        end
        [-10,-1,1,10].each { |ec|
          it "should consider the process stopped if the command returns something non-0" do
            provider.expects(:texecute).with(:status, ['/service/path/myservice', :status], false).returns("")
            $CHILD_STATUS.stubs(:exitstatus).returns(ec)
            provider.status.should == :stopped
          end
        }
      end
      describe "when hasstatus is not :true" do
        before :each do
          resource[:hasstatus] = :false
        end

        it "should consider the service :running if it has a pid" do
          provider.expects(:getpid).returns "1234"
          provider.status.should == :running
        end
        it "should consider the service :stopped if it doesn't have a pid" do
          provider.expects(:getpid).returns nil
          provider.status.should == :stopped
        end
      end
    end

    describe "when restarting and hasrestart is not :true" do
      before :each do
        resource[:hasrestart] = :false
      end

      it "should stop and restart the process" do
        provider.expects(:texecute).with(:stop, ['/service/path/myservice', :stop ], true).returns("")
        provider.expects(:texecute).with(:start,['/service/path/myservice', :start], true).returns("")
        $CHILD_STATUS.stubs(:exitstatus).returns(0)
        provider.restart
      end
    end
  end
end