packer/rpc: Implement full communicator interface

packer/rpc/communicator.go

@@ -87,6 +87,10 @@ func (c *communicator) Start(cmd string) (rc *packer.RemoteCommand, err error) {
 	return
 }
 
+func (c *communicator) Upload(string, io.Reader) {}
+
+func (c *communicator) Download(string, io.Writer) {}
+
 func (c *CommunicatorServer) Start(cmd *string, reply *CommunicatorStartResponse) (err error) {
 	// Start executing the command.
 	command, err := c.c.Start(*cmd)

packer/rpc/communicator_test.go

@@ -98,10 +98,10 @@ func TestCommunicatorRPC(t *testing.T) {
 }
 
 func TestCommunicator_ImplementsCommunicator(t *testing.T) {
-	//assert := asserts.NewTestingAsserts(t, true)
+	assert := asserts.NewTestingAsserts(t, true)
 
-	//var r packer.Communicator
-	//c := Communicator(nil)
+	var r packer.Communicator
+	c := Communicator(nil)
 
-	//assert.Implementor(c, &r, "should be a Communicator")
+	assert.Implementor(c, &r, "should be a Communicator")
 }