[Pharo-users] TestCase question

[Werner Kassens]

hi,
i have a testsuite that is a subclass of TestCase with this method:
testStupid
|a|
a :=#(1).
self assert: a first isNumber .
a :=a at:1 put: nil.

if i run the test once, it succeeds, but but when i run it a second time 
it fails. this seems to be sligthly counterintuitive, or how do i have 
to understand it?

werner