Thanks, that makes sense.  Isn't that a bug since Strings are mutable?

--------------------------------------------------
From: "Nicolas Cellier" <nicolas.cellier.aka.nice at gmail.com>
Sent: Sunday, July 25, 2010 3:51 AM
To: "The general-purpose Squeak developers list" 
<squeak-dev at lists.squeakfoundation.org>
Subject: Re: [squeak-dev] TestRunner not assigning strings/remembering old 
values of temp vars.

> Of course, 'squeaker' is a literal stored in the CompiledMethod.
> If you write over it, then you break the literal for next method 
> execution.
>
> Each time you evaluate in a workspace, you create a new CompiledMethod
> and a new literal.
> When you compile in a class, that's different because you compiled
> only once and execute many.
>
> Nicolas
>
> 2010/7/25 Rob Withers <reefedjib at yahoo.com>:
>> I am testing the CryptoDESTest.  I am getting some strange behavior. 
>> When I
>> run the following code in a Workspace, repeatably, I get the same 
>> results:
>>
>> code:
>>
>>        | plain key d |
>>        plain := 'squeaker'.
>>        key := 'hacking!'.
>>        Transcript cr; show: 'plain: ', plain printString.
>>        d := DES key: key.
>>        d encryptBlock: plain.
>>        Transcript cr; show: 'plain: ', plain printString.
>>        self assert: plain asByteArray = #[64 222 70 13 59 145 76 186].
>>        plain destroy.
>>
>> output:
>>
>> plain: 'squeaker'
>> plain: '@ÞF
>> ;‘Lº'
>> plain: 'squeaker'
>> plain: '@ÞF
>> ;‘Lº'
>> plain: 'squeaker'
>> plain: '@ÞF
>> ;‘Lº'
>>
>> However, when I run this as a test method:
>>
>> testDES3
>>        | plain key d |
>>        plain := 'squeaker'.
>>        key := 'hacking!'.
>>        Transcript cr; show: 'plain: ', plain printString.
>>        d := DES key: key.
>>        d encryptBlock: plain.
>>        Transcript cr; show: 'plain: ', plain printString.
>>        self assert: plain asByteArray = #[64 222 70 13 59 145 76 186].
>>               plain destroy.
>>
>> I get the following output and the test fails:
>>
>> plain: 'squeaker'
>> plain: '@ÞF
>> ;‘Lº'
>> plain: '        '
>> plain: '£ƒ¼ïùmÞ$'
>> plain: '£ƒ¼ïùmÞ$'
>> plain: '§,}ºé¨öú'
>> plain: '§,}ºé¨öú'
>> plain: '3qX¦wRË|'
>> plain: '3qX¦wRË|'
>> plain: 'Ê0ê^ó{ì '
>> plain: 'Ê0ê^ó{ì '
>> plain: 'çî³›,ίw'
>>
>> Why is test runner remembering the old value and not setting it with: 
>> plain
>> := 'squeaker'.?
>>
>> TIA,
>> Rob
>>
>>
>