Denis Kudriashov wrote:
So you want to stub message to *any* instance of class. Right?
Conceptually, in Mocketry/StateSpecs way, it should looks like:
(Instance of: Something) stub askForName willReturn: 'new'.
or:
(Kind of: Something) stub askForName willReturn: 'new'.
But it will not really works. It will work only on instances which are
already "stubbed".
Making it really transparent will require crazy magic underhood. And I
am not sure that it is really possible.
Because generally it should cover existing instances and not just newly
created during test.
And for simple case: to automatically stub new instances their classes
should be stubbed with special constructors. But system do not know what
exact class side messages are constructors.
I had this problem. I tried something like (though not exactly w/ this
code):
Foo stub new will: [ :aMessage |
| original |
original := MockExpectedOriginalCall new executeFor: aMessage.
original stub.
^ original ]
but IIRC it failed on doing #stub inside will: block.
So now you can just use simple mock which will be returned as simple
stub from concrete constructor of your class:
some := Mock new.
some stub askForName: 'new'.
Something stub new willReturn: some.
I think it looks not not bad and no crazy magic is evolved. And of
course you can replace mock with real instance if you want:
some := Something new.
some stub askForName: 'new'.
Something stub new willReturn: some.
2017-10-20 14:21 GMT+02:00 Denis Kudriashov <[email protected]
<mailto:[email protected]>>:
Yes, but in that case you stub messages to the class itself. For
your example it means:
Something stub askForName willReturn: 'new'.
Something askForName should be: 'new'
2017-10-20 13:58 GMT+02:00 Peter Uhnák <[email protected]
<mailto:[email protected]>>:
Thanks Denis, that did the trick.
But I thought that I can also mock at the class level (at least
it was shown in the docs).
Peter
On Sat, Oct 7, 2017 at 11:24 AM, Denis Kudriashov
<[email protected] <mailto:[email protected]>> wrote:
Hi Peter.
You should stub instance instead of class:
s := Something new.
s stub askFor...
7 окт. 2017 г. 9:18 пользователь "Peter Uhnák"
<[email protected] <mailto:[email protected]>> написал:
Hi,
maybe I am missing something fundamental, because this
seems like an obvious scenario
I have a class Something with two methods
Something>>askForName
^ UIManager default request: 'Name'
Something>>name
^ self askForName , ' suffix'
Now I want to mock out askForName, so I can run it
automatically in tests...
I've tried just stubbing it...
SomethingTest>>testRenameStub
Something stub askForName willReturn: 'new'.
Something new name should be: 'new suffix'
however it still opens the window to ask for the name,
so the original method is being called.
Right now I have to stub it with metalinks, which
doesn't play well with some tools (hapao)
SomethingTest>>testRenameMeta
| link newName |
link := MetaLink new
metaObject: [ 'new' ];
control: #instead.
(Something >> #askForName) ast link: link.
[ newName := Something new name ]
ensure: [ link uninstall ].
self assert: newName equals: 'new suffix'
Thanks,
Peter
