Allow pipelined calls within multi blocks (#125)

lib/mock_redis/transaction_wrapper.rb

@@ -87,6 +87,10 @@ def multi
       end
     end
 
+    def pipelined
+      yield(self) if block_given?
+    end
+
     def unwatch
       'OK'
     end

spec/transactions_spec.rb

@@ -17,7 +17,7 @@
       end.should raise_error(Redis::CommandError)
     end
 
-    it 'cleans state of tansaction wrapper if exception occurs during transaction' do
+    it 'cleans state of transaction wrapper if exception occurs during transaction' do
       lambda do
         @redises.mock.multi do |_r|
           raise "i'm a command that fails"
@@ -55,6 +55,18 @@
         end.should raise_error(Redis::CommandError)
       end
     end
+
+    it 'allows pipelined calls within multi blocks' do
+      @redises.set('counter', 5)
+      @redises.multi do |r|
+        r.pipelined do |pr|
+          pr.set('test', 1)
+          pr.incr('counter')
+        end
+      end
+      @redises.get('counter').should == '6'
+      @redises.get('test').should == '1'
+    end
   end
 
   context '#discard' do