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-rw-r--r--ext/psych/lib/psych/handlers/recorder.rb39
1 files changed, 39 insertions, 0 deletions
diff --git a/ext/psych/lib/psych/handlers/recorder.rb b/ext/psych/lib/psych/handlers/recorder.rb
new file mode 100644
index 0000000000..4eae62e5f9
--- /dev/null
+++ b/ext/psych/lib/psych/handlers/recorder.rb
@@ -0,0 +1,39 @@
+require 'psych/handler'
+
+module Psych
+ module Handlers
+ ###
+ # This handler will capture an event and record the event. Recorder events
+ # are available vial Psych::Handlers::Recorder#events.
+ #
+ # For example:
+ #
+ # recorder = Psych::Handlers::Recorder.new
+ # parser = Psych::Parser.new recorder
+ # parser.parse '--- foo'
+ #
+ # recorder.events # => [list of events]
+ #
+ # # Replay the events
+ #
+ # emitter = Psych::Emitter.new $stdout
+ # recorder.events.each do |m, args|
+ # emitter.send m, *args
+ # end
+
+ class Recorder < Psych::Handler
+ attr_reader :events
+
+ def initialize
+ @events = []
+ super
+ end
+
+ EVENTS.each do |event|
+ define_method event do |*args|
+ @events << [event, args]
+ end
+ end
+ end
+ end
+end