logstash/logstash — pull request #633 by wiibaa (2013-09-11 12:45:46+00:00)
Title: Correct test case spec/output/file.rb

Trying to execute the spec for output/file, I got two small issues:
- The Logstash::Event.from_json class method was unavailable since 1.2.0
- test code not in sync with 1.2.x

here are the fixes.
On JIRA side, I will close LOGSTASH-997 as cannot reproduce.