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require 'puppettest'

module PuppetTest::FileTesting
    include PuppetTest
    def cycle(comp)
        trans = nil
        assert_nothing_raised {
            trans = comp.evaluate
        }
        assert_nothing_raised {
            trans.evaluate
        }
    end

    def randlist(list)
        num = rand(4)
        if num == 0
            num = 1
        end
        set = []

        ret = []
        num.times { |index|
            item = list[rand(list.length)]
            if set.include?(item)
                redo
            end

            ret.push item
        }
        return ret
    end

    def mkranddirsandfiles(dirs = nil,files = nil,depth = 3)
        if depth < 0
            return
        end

        unless dirs
            dirs = %w{This Is A Set Of Directories}
        end

        unless files
            files = %w{and this is a set of files}
        end

        tfiles = randlist(files)
        tdirs = randlist(dirs)

        tfiles.each { |file|
            File.open(file, "w") { |of|
                4.times {
                    of.puts rand(100)
                }
            }
        }

        tdirs.each { |dir|
            # it shouldn't already exist, but...
            unless FileTest.exists?(dir)
                Dir.mkdir(dir)
                FileUtils.cd(dir) {
                    mkranddirsandfiles(dirs,files,depth - 1)
                }
            end
        }
    end

    def file_list(dir)
        list = nil
        FileUtils.cd(dir) {
            list = %x{find . 2>/dev/null}.chomp.split(/\n/)
        }
        return list
    end

    def assert_trees_equal(fromdir,todir)
        assert(FileTest.directory?(fromdir))
        assert(FileTest.directory?(todir))

        # verify the file list is the same
        fromlist = nil
        FileUtils.cd(fromdir) {
            fromlist = %x{find . 2>/dev/null}.chomp.split(/\n/).reject { |file|
            ! FileTest.readable?(file)
        }.sort
        }
        tolist = file_list(todir).sort

        fromlist.sort.zip(tolist.sort).each { |a,b|
            assert_equal(a, b,
        "Fromfile %s with length %s does not match tofile %s with length %s" %
            [a, fromlist.length, b, tolist.length])
        }
        #assert_equal(fromlist,tolist)

        # and then do some verification that the files are actually set up
        # the same
        checked = 0
        fromlist.each_with_index { |file,i|
            fromfile = File.join(fromdir,file)
            tofile = File.join(todir,file)
            fromstat = File.stat(fromfile)
            tostat = File.stat(tofile)
            [:ftype,:gid,:mode,:uid].each { |method|
                assert_equal(
                             fromstat.send(method),
                             tostat.send(method)
                            )

                            next if fromstat.ftype == "directory"
                            if checked < 10 and i % 3 == 0
                                from = File.open(fromfile) { |f| f.read }
                                to = File.open(tofile) { |f| f.read }

                                assert_equal(from,to)
                                checked += 1
                            end
            }
        }
    end

    def random_files(dir)
        checked = 0
        list = file_list(dir)
        list.reverse.each_with_index { |file,i|
            path = File.join(dir,file)
            stat = File.stat(dir)
            if checked < 10 and (i % 3) == 2
                unless yield path
                    next
                end
                checked += 1
            end
        }
    end

    def delete_random_files(dir)
        deleted = []
        random_files(dir) { |file|
            stat = File.stat(file)
            begin
                if stat.ftype == "directory"
                    false
                else
                    deleted << file
                    File.unlink(file)
                    true
                end
            rescue => detail
                # we probably won't be able to open our own secured files
                puts detail
                false
            end
        }

        return deleted
    end

    def add_random_files(dir)
        added = []
        random_files(dir) { |file|
            stat = File.stat(file)
            begin
                if stat.ftype == "directory"
                    name = File.join(file,"file" + rand(100).to_s)
                    File.open(name, "w") { |f|
                        f.puts rand(10)
                    }
                    added << name
                else
                    false
                end
            rescue => detail
                # we probably won't be able to open our own secured files
                puts detail
                false
            end
        }
        return added
    end

    def modify_random_files(dir)
        modded = []
        random_files(dir) { |file|
            stat = File.stat(file)
            begin
                if stat.ftype == "directory"
                    false
                else
                    File.open(file, "w") { |f|
                        f.puts rand(10)
                    }
                    modded << name
                    true
                end
            rescue => detail
                # we probably won't be able to open our own secured files
                puts detail
                false
            end
        }
        return modded
    end

    def readonly_random_files(dir)
        modded = []
        random_files(dir) { |file|
            stat = File.stat(file)
            begin
                if stat.ftype == "directory"
                    File.new(file).chmod(0111)
                else
                    File.new(file).chmod(0000)
                end
                modded << file
            rescue => detail
                # we probably won't be able to open our own secured files
                puts detail
                false
            end
        }
        return modded
    end

    def conffile
        exampledir("root/etc/configfile")
    end
end