Re: [MO-java-dev] verify()ing object hierachies.

[Simon L. <sim...@uk...>]

On Friday 13 September 2002 11:55, Jeff Martin wrote:
> It's a general policy to not have mocks manage the relationships with
> other mocks. The idea is to keep the mocks as simple as possible.
>
> This is the reason I've started work on the test helper classes which
> setup the tree of mocks for you. Though I've not produced any for the
> JDBC classes as it's more complex than the servlet api.
>
I can see this being helpful when there is a collection of objects that=20
need to be associated to sets of each other that have no real defined=20
(single) parent object, but the association of ResultSet to Statement to=20
Connection is a very simple child to single parent relationship. Or am I=20
missing something?

My changes do the association at usage time (I didn't say that before=20
TBF), in that when a Statement or ResultSet gets returned, it is=20
automatically associated with the Object that you called to get it (I=20
can't see a situation, for JDBC at least, where you would want this any=20
different - or infact has any advantage).

The set<Parent> interface is still required, as you may have methods to=20
test that take a ResultSet, or Statement, for which the parent object=20
needs manually setting.

> Don't think this helps if the dependency is more than one level deep.
[...]
> Tempted to say forget thread safety (That's not to say it's okay to
> have static variables.).
>
I've got a change (cvs diff -u attached) to Verifier that now at least=20
works for me.
It has a static Vector (simplest why I could think of) of in verify()=20
objects, and ignores any object already being verified. It also doesn't=20
require any interface change.

This solves my problem, and unless specific object implementations of=20
verify cause a loop (which was a potential problem anyway), I can't see=20
how this is any worse.

Simon.,
=2D-=20
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         Simon Levitt, Senior Development Engineer @ WorldPay plc,
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 Sim...@uk...   Ph:+44(0)1223 715151  F:+44(0)1223 715157
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