flock can't break

lib/fakefs/file.rb

@@ -337,7 +337,7 @@ module FakeFS
     end
 
     def flock(locking_constant)
-      raise NotImplementedError
+      #raise NotImplementedError
     end
 
     def mtime

test.watchr

@@ -0,0 +1,6 @@
+watch('test/.*_test.rb') { run_tests }
+watch('lib/.*.rb') { run_tests }
+
+def run_tests
+	system 'rake test'
+end