Hello, I solved that part but I wonder if  some one can give me a hint how I can read the package send from the server consume seems to return a node and not a package. Roelof Op 30-10-2019 om 06:56 schreef Roelof Wobben:

Thanks,

That part I understand  but what I try  to say is that if I understand the code right the string BALL  is send back to the node that send the orginal messsgae #ball.  But as I said that one do not seem to recieve any packages and my question is still why ?

I debugged it several times but I do not see the reason.

Roelof

Op 30-10-2019 om 01:38 schreef Richard O'Keefe:

...

The first question you should ask is "What do I expect #ball asUppercase to be?" The ANSI Smalltalk standard says 5.7.10.9 Message:  asUppercase Synopsis    Answer a new string which contains all of the elements of the receiver converted to their upper case equivalents. Definition: <readableString>    Answer a new string which contains all of the elements of the receiver converted to their upper case equivalents. Individual element of the string are converted as if they were receivers of the message #asUppercase. Return Values    <readableString> new Errors    none

Notice the word "string", the protocol "<readableString>", and the entire absence of anything suggesting that the receiver and result belong to the same class.

In my Smalltalk library, the receiver and result DO belong to the same class, so #ball asUppercase ==> #BALL. But the ANSI standard does not require that. And I may change my library, because GNU Smalltalk, Dolphin Smalltalk, Smalltalk/X, Squeak, and Pharo all return a String.  (On the other hand, one reason I wrote my Smalltalk was to press the edges of the ANSI standard, so maybe I'll leave it.)

So I think where you have #BALL you should have 'BALL'. There may be other issues.

On Wed, 30 Oct 2019 at 11:00, Roelof Wobben via Pharo-users <pharo-users@lists.pharo.org> wrote:

...

Hello,

I have to  made this challenge as last on of the OOP book

Servers answering requests

When a server node consumes a packet, it converts the payload to uppercase, then sends that back to the sender of the request.

This is yet another subclass which redefines the consume: method, but this time the node is stateless, so we have no initialization or accessor methods to write:

KANetworkNode subclass: #KANetworkServer instanceVariableNames: '' classVariableNames: '' category: 'NetworkSimulator-Nodes'

KANetworkServer >> consume: aPacket | response | response := aPacket payload asUppercase. self send: (KANetworkPacket from: self address to: aPacket sourceAddress payload: response)

Define a test for the behavior of server nodes.

I tried but I miss something

so far as I have this :

testSendToServer      | packet ping pong link |      packet := KANetworkPacket from: #ping to: #pong payload: #ball.      ping := net nodeAt: #ping.      pong := net nodeAt: #pong.      link := net linkFrom: #ping to: #pong.      ping send: packet.      pong consume: packet.

but whatever I tried I cannot think of a test that works.

I tried

assert:  ping payload equals: #BALL assert: ping arrievedpackages equals; 1

but they all fail

It looks like ping does not recieve the package back.

What do I do wrong or what can I test better ?

my code so far : https://github.com/RoelofWobben/network

and the problem is the testToServerTest that I cannot make work

Regards,

Roelof