I checked
testNilWhenErrorInLookup
"(self selector: #testNilWhenErrorInLookup) run"
self assert: (pointClass lookup: #zork) isNil.
"The method zork is NOT implement on pointClass"
testRaisesErrorSendWhenErrorInLookup
"(self selector: #testRaisesErrorSendWhenErrorInLookup) run"
self should: [ pointClass send: #zork withArguments: { aPoint } ]
raise: Error.
"Open a Transcript to see the message trace"
Le 19/11/15 13:50, Edouard Delbar a écrit :
Hello everyone,
I'm new on this mailing list, this is my first mail :-)
I'm a student from University of Lille (France). I'm studying this
tutorial (I'm using Pharo 4 but it seems not to be a problem):
http://sdmeta.gforge.inria.fr/Teaching/ObjVLisp/ObjV.pillar.pdf. I'm
working with the "ObjVLispSkeleton-StephaneDucasse.1" image loaded
from this repository:
MCSmalltalkhubRepository
owner: 'StephaneDucasse'
project: 'ObjVLispSkeleton'
user: ''
password: ''
I'm stuck at "Method Lookup" p11. First, it seems that unit tests
"testNilWhenErrorInLookup" and "testRaisesErrorSendWhenErrorInLookup"
are not provided, thus I'm not sure that I'm working with the right
image (everything was fine until p11 though). Then, the "lookup:
selector" is not provided neither. While there is another method named
"lookup: selector from: anObjObject", I can't figure out what I'm
supposed to do with the second parameter.
Ok I checked in the other method is old
the new one should be
lookup: selector
"look for the method named <selector> starting in the receiver.
The lookup is done for a message sent to <anObjObject>. self is an
objClass"
Here is what I would do:
lookup: selector
"look for the method named <selector> starting in the receiver.
The lookup is done for a message sent to <anObjObject>. self is an
objClass"
^ self objMethodDict
at: selector
ifAbsent: [ self objSuperclassId ifNotNil: [ self objSuperclass
lookup: selector ] ]
Could someone tell me if this implementation is correct? If it's
correct, what do you think the second parameter is for?
Moreover, do you think I'm working with the right image?
Thanks.
- Edouard
