module Logging::Appenders # Accessor / Factory for the StringIo appender. # def self.string_io( *args ) return ::Logging::Appenders::StringIo if args.empty? ::Logging::Appenders::StringIo.new(*args) end # This class provides an Appender that can write to a StringIO instance. # This is very useful for testing log message output. # class StringIo < ::Logging::Appenders::IO # The StringIO instance the appender is writing to. attr_reader :sio # call-seq: # StringIo.new( name, opts = {} ) # # Creates a new StringIo appender that will append log messages to a # StringIO instance. # def initialize( name, opts = {} ) @sio = StringIO.new @sio.extend IoToS @pos = 0 super(name, @sio, opts) end # Reopen the underlying StringIO instance. If the instance is currently # closed then it will be opened. If the instance is currently open then it # will be closed and immediately opened. # def reopen @mutex.synchronize { if defined? @io and @io flush @io.close rescue nil end @io = @sio = StringIO.new @sio.extend IoToS @pos = 0 } super self end # Clears the internal StringIO instance. All log messages are removed # from the buffer. # def clear @mutex.synchronize { @pos = 0 @sio.seek 0 @sio.truncate 0 } end alias :reset :clear %w[read readline readlines].each do|m| class_eval <<-CODE def #{m}( *args ) sync { begin @sio.seek @pos rv = @sio.#{m}(*args) @pos = @sio.tell rv rescue EOFError nil end } end CODE end # :stopdoc: module IoToS def to_s seek 0 str = read seek 0 return str end end # :startdoc: end # StringIo end # Logging::Appenders