From ee7d4c47e7abf1e5ec8f4d4a1e937cdee5bb8d9c Mon Sep 17 00:00:00 2001
From: Yehuda Katz + Carl Lerche <ykatz+clerche@engineyard.com>
Date: Wed, 1 Jul 2009 16:56:43 -0700
Subject: Fixes bug where Memcached connections get corrupted when an invalid
 expire is passed in [#2854 state:resolved]

---
 activesupport/lib/active_support/cache.rb | 13 +++++++++++--
 activesupport/test/caching_test.rb        | 19 +++++++++++++++++++
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb
index 3c422e0252..448db538ab 100644
--- a/activesupport/lib/active_support/cache.rb
+++ b/activesupport/lib/active_support/cache.rb
@@ -99,11 +99,16 @@ module ActiveSupport
     class Store
       cattr_accessor :logger
 
+      attr_reader :silence, :logger_off
+
       def silence!
         @silence = true
         self
       end
 
+      alias silence? silence
+      alias logger_off? logger_off
+
       # Fetches data from the cache, using the given key. If there is data in
       # the cache with the given key, then that data is returned.
       #
@@ -233,11 +238,15 @@ module ActiveSupport
 
       private
         def expires_in(options)
-          (options && options[:expires_in]) || 0
+          expires_in = options && options[:expires_in]
+
+          raise ":expires_in must be a number" if expires_in && !expires_in.is_a?(Numeric)
+
+          expires_in || 0
         end
 
         def log(operation, key, options)
-          logger.debug("Cache #{operation}: #{key}#{options ? " (#{options.inspect})" : ""}") if logger && !@silence && !@logger_off
+          logger.debug("Cache #{operation}: #{key}#{options ? " (#{options.inspect})" : ""}") if logger && !silence? && !logger_off?
         end
     end
   end
diff --git a/activesupport/test/caching_test.rb b/activesupport/test/caching_test.rb
index 928af256f4..7667f11343 100644
--- a/activesupport/test/caching_test.rb
+++ b/activesupport/test/caching_test.rb
@@ -1,3 +1,4 @@
+require 'logger'
 require 'abstract_unit'
 require 'active_support/cache'
 
@@ -190,6 +191,8 @@ uses_memcached 'memcached backed store' do
       @cache = ActiveSupport::Cache.lookup_store(:mem_cache_store)
       @data = @cache.instance_variable_get(:@data)
       @cache.clear
+      @cache.silence!
+      @cache.logger = Logger.new("/dev/null")
     end
 
     include CacheStoreBehavior
@@ -312,6 +315,22 @@ uses_memcached 'memcached backed store' do
       app = @cache.middleware.new(app)
       app.call({})
     end
+
+    def test_expires_in
+      result = @cache.write('foo', 'bar', :expires_in => 1)
+      assert_equal 'bar', @cache.read('foo')
+      sleep 2
+      assert_equal nil, @cache.read('foo')
+    end
+
+    def test_expires_in_with_invalid_value
+      @cache.write('baz', 'bat')
+      assert_raise(RuntimeError) do
+        @cache.write('foo', 'bar', :expires_in => 'Mon Jun 29 13:10:40 -0700 2150')
+      end
+      assert_equal 'bat', @cache.read('baz')
+      assert_equal nil, @cache.read('foo')
+    end
   end
 
   class CompressedMemCacheStore < ActiveSupport::TestCase
-- 
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