commit 332735b52720466ca8eb9e089cc42f128d54b644
Author: Lukas Oberhuber <lukaso@gmail.com>
Date:   Tue Dec 20 09:19:05 2011 +0000

    Add advise function to File which is in ruby 1.9.3. As it is only a hint to the
    os in some cases, the function does nothing.

diff --git a/lib/fakefs/file.rb b/lib/fakefs/file.rb
index 5684ede..ebc3ff8 100644
--- a/lib/fakefs/file.rb
+++ b/lib/fakefs/file.rb
@@ -392,6 +392,11 @@ module FakeFS
       end
     end
 
+    if RUBY_VERSION >= "1.9.3"
+      def advise(advice, offset=0, len=0)
+      end
+    end
+    
   private
 
     def check_modes!
diff --git a/test/fakefs_test.rb b/test/fakefs_test.rb
index 0f34950..1d5bf7a 100644
--- a/test/fakefs_test.rb
+++ b/test/fakefs_test.rb
@@ -1861,4 +1861,14 @@ class FakeFSTest < Test::Unit::TestCase
       end
     end
   end
+  
+  if RUBY_VERSION >= "1.9.3"
+    def test_advise
+      File.open("foo", 'w') do |f|
+        assert_nothing_raised do
+          f.advise(:normal, 0, 0)
+        end
+      end
+    end
+  end
 end