Mocking Win32 API

[John Elrick]

"Alvin777" <alvin777@mail.ru> wrote in message
news:1c9319e1.0307030807.64f25c31@posting.google.com... How can I use something like mock objects when calling Win API functions like this? [C++] class WrMAPISession { public: void Logon(); ... } void WrMAPISession::Logon() { ... MAPILogonEx(....); ... } Write a class, which consists of one function - MAPILogonEx - and use its instance as a parameter when calling Logon()? That doesn't sound good.

Sure...why not? Adapter Pattern. You reduce the area of potential breakage
to a very narrow point.

You could pass it in, create a Singleton, or create a MAPIGateway
Adapter...whichever makes the most sense for your project.

I've found Adapters to be invaluable in simplifying testing.


John Elrick

[John Roth]

"John Elrick" <jelrick@adelphia.net> wrote in message
news:rCYMa.9763$Hw.6661167@news2.news.adelphia.net... "Alvin777" <alvin777@mail.ru> wrote in message news:1c9319e1.0307030807.64f25c31@posting.google.com... How can I use something like mock objects when calling Win API functions like this? [C++] class WrMAPISession { public: void Logon(); ... } void WrMAPISession::Logon() { ... MAPILogonEx(....); ... } Write a class, which consists of one function - MAPILogonEx - and
use its instance as a parameter when calling Logon()? That doesn't sound good. Sure...why not? Adapter Pattern. You reduce the area of potential
breakage to a very narrow point. You could pass it in, create a Singleton, or create a MAPIGateway Adapter...whichever makes the most sense for your project. I've found Adapters to be invaluable in simplifying testing.

Oh, absolutely. I've found that too. There are things I couldn't have
tested adequately without them.

John Roth John Elrick

[Alvin777]

"John Elrick" <jelrick@adelphia.net> wrote in message news:<rCYMa.9763$Hw.6661167@news2.news.adelphia.net>... "Alvin777" <alvin777@mail.ru> wrote in message news:1c9319e1.0307030807.64f25c31@posting.google.com... How can I use something like mock objects when calling Win API functions like this? [C++] class WrMAPISession { public: void Logon(); ... } void WrMAPISession::Logon() { ... MAPILogonEx(....); ... } Write a class, which consists of one function - MAPILogonEx - and use its instance as a parameter when calling Logon()? That doesn't sound good. Sure...why not? Adapter Pattern. You reduce the area of potential breakage to a very narrow point. You could pass it in, create a Singleton, or create a MAPIGateway Adapter...whichever makes the most sense for your project. I've found Adapters to be invaluable in simplifying testing. John Elrick

Hm. Can you give C++ examples of creating Singleton (I know the
pattern, but no ideas how to use it in my case) and creating
MAPIGatewayAdapter?

--
Alvin777

[David Postill]

[This followup was posted to comp.software.extreme-programming, cc: the cited
author, Alvin777]

In article <1c9319e1.0307040435.79505b74@posting.google.com>, on 4 Jul 2003
05:35:00 -0700, alvin777@mail.ru (Alvin777) wrote:

| "John Elrick" <jelrick@adelphia.net> wrote in message news:<rCYMa.9763$Hw.6661167@news2.news.adelphia.net>...
| > "Alvin777" <alvin777@mail.ru> wrote in message
| > news:1c9319e1.0307030807.64f25c31@posting.google.com...
| > > How can I use something like mock objects when calling Win API
| > > functions like this?

<snip>

| > > Write a class, which consists of one function - MAPILogonEx - and use
| > > its instance as a parameter when calling Logon()? That doesn't sound
| > > good.
| >
| > Sure...why not? Adapter Pattern. You reduce the area of potential breakage
| > to a very narrow point.
| >
| > You could pass it in, create a Singleton, or create a MAPIGateway
| > Adapter...whichever makes the most sense for your project.
| >
| > I've found Adapters to be invaluable in simplifying testing.
| >
| >
| > John Elrick
|
| Hm. Can you give C++ examples of creating Singleton (I know the
| pattern, but no ideas how to use it in my case) and creating
| MAPIGatewayAdapter?

"Implementing the Singleton Design Pattern"
<http://gethelp.devx.com/techtips/cpp_pro/10min/10min0200.asp>

<davidp />

--
David Postill

[Alvin777]

"Michael Feathers" <mfeathers@objectmentorNOSPAM.com> wrote in message news:<be47vt$vv7$1@slb4.atl.mindspring.net>... "David Postill" <david.postill@pobox.com> wrote in message news:9huagv85kc3ad4tfafcp2atqp6ck8dgeip@4ax.com... [This followup was posted to comp.software.extreme-programming, cc: the cited author, Alvin777] In article <1c9319e1.0307040435.79505b74@posting.google.com>, on 4 Jul 2003 05:35:00 -0700, alvin777@mail.ru (Alvin777) wrote: | "John Elrick" <jelrick@adelphia.net> wrote in message news:<rCYMa.9763$Hw.6661167@news2.news.adelphia.net>... | > "Alvin777" <alvin777@mail.ru> wrote in message | > news:1c9319e1.0307030807.64f25c31@posting.google.com... | > > How can I use something like mock objects when calling Win API | > > functions like this? <snip> | > > Write a class, which consists of one function - MAPILogonEx - and use | > > its instance as a parameter when calling Logon()? That doesn't sound | > > good. | > | > Sure...why not? Adapter Pattern. You reduce the area of potential breakage | > to a very narrow point. | > | > You could pass it in, create a Singleton, or create a MAPIGateway | > Adapter...whichever makes the most sense for your project. | > | > I've found Adapters to be invaluable in simplifying testing. | > | > | > John Elrick | | Hm. Can you give C++ examples of creating Singleton (I know the | pattern, but no ideas how to use it in my case) and creating | MAPIGatewayAdapter? "Implementing the Singleton Design Pattern" <http://gethelp.devx.com/techtips/cpp_pro/10min/10min0200.asp> Wait. Why do you want to use a singleton? Michael Feathers www.objectmentor.com

I don't want :) I was offered to use and I'd like to understand how
can I apply this pattern in my case.
| > You could pass it in, create a Singleton, or create a MAPIGateway
^^^^^^^^^^^^^^^^^^ | > Adapter...whichever makes the most sense for your project.

--
Alvin777