MemoryStore#read_multi(*keys) for dev-mode compatibility with memcache store

activesupport/lib/active_support/cache/memory_store.rb

@@ -21,6 +21,12 @@ module ActiveSupport
         @data = {}
       end
 
+      def read_multi(*names)
+        results = {}
+        names.each { |n| results[n] = read(n) }
+        results
+      end
+
       def read(name, options = nil)
         super do
           @data[name]
@@ -45,7 +51,7 @@ module ActiveSupport
         end
       end
 
-      def exist?(name,options = nil)
+      def exist?(name, options = nil)
         super do
           @data.has_key?(name)
         end

activesupport/test/caching_test.rb

@@ -185,6 +185,13 @@ class MemoryStoreTest < ActiveSupport::TestCase
     @cache.write('foo', bar)
     assert_nothing_raised { bar.gsub!(/.*/, 'baz') }
   end
+
+  def test_multi_get
+    @cache.write('foo', 1)
+    @cache.write('goo', 2)
+    result = @cache.read_multi('foo', 'goo')
+    assert_equal({'foo' => 1, 'goo' => 2}, result)
+  end
 end
 
 uses_memcached 'memcached backed store' do