Comments on: How to unit-test code that interacts with a database http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/ Stay curious! Thu, 09 Feb 2012 20:41:20 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: John Battista http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-18456 John Battista Wed, 30 Jun 2010 18:03:51 +0000 http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-18456 Very interesting read. I just felt the need to point out that mock objects are necessarily the level of evil you make them out to be, especially if you have physical inputs to your system. The difficulty in causes real physical interactions / conditions to control the output of sensors that is used by other objects requires construction of further physical interaction equipment with sensors ect. In cases like that trying to create the physical interactions instead of mocking up the data streams is equivalent to trying to mock out a database instead of using a real one. You create a massive work burden on yourself that cannot really be fulfilled and used to test a full range of conditions. With mocks in a physical interaction system you can send in the full range of possible data in a fraction of the time at a fraction of the cost. Just like any other tool its not good or bad, but it needs to be applied properly! Very interesting read. I just felt the need to point out that mock objects are necessarily the level of evil you make them out to be, especially if you have physical inputs to your system.

The difficulty in causes real physical interactions / conditions to control the output of sensors that is used by other objects requires construction of further physical interaction equipment with sensors ect.

In cases like that trying to create the physical interactions instead of mocking up the data streams is equivalent to trying to mock out a database instead of using a real one. You create a massive work burden on yourself that cannot really be fulfilled and used to test a full range of conditions. With mocks in a physical interaction system you can send in the full range of possible data in a fraction of the time at a fraction of the cost.

Just like any other tool its not good or bad, but it needs to be applied properly!

]]> By: Rick http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-17510 Rick Tue, 29 Dec 2009 00:23:40 +0000 http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-17510 Guys, is there any tool to do unit test on MySQL? Thx. Guys,
is there any tool to do unit test on MySQL?
Thx.

]]> By: Frank http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-17475 Frank Wed, 23 Dec 2009 23:30:04 +0000 http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-17475 One approach we have used successfully was to embed the mysql server into our C++ test executables. At least for the relatively small database that the project included this worked reasonably well. No modifications to the database access layer were necessary and creating a blank database was just a matter of copying some small files into a temporary directory. You loose the ability to easily debug the content of the database, but with some dump-tools this was not a big problem. One approach we have used successfully was to embed the mysql server into our C++ test executables. At least for the relatively small database that the project included this worked reasonably well.
No modifications to the database access layer were necessary and creating a blank database was just a matter of copying some small files into a temporary directory. You loose the ability to easily debug the content of the database, but with some dump-tools this was not a big problem.

]]> By: Applications et bases de données, comment tester ? « Choses à faire http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-17452 Applications et bases de données, comment tester ? « Choses à faire Thu, 17 Dec 2009 09:47:25 +0000 http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-17452 [...] les Mocks peuvent ne pas être appropriés pour les tests d’accès à la base, certains les déconseillent même vivement.Les avantages sont une vitesse d’exécution bien supérieure, en plus de pouvoir tester [...] [...] les Mocks peuvent ne pas être appropriés pour les tests d’accès à la base, certains les déconseillent même vivement.Les avantages sont une vitesse d’exécution bien supérieure, en plus de pouvoir tester [...]

]]> By: nathanr http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-16651 nathanr Fri, 10 Jul 2009 11:09:24 +0000 http://www.xaprb.com/blog/2008/08/19/how-to-unit-test-code-that-interacts-with-a-database/#comment-16651 justinb is spot on unit tests responsibility is to test the actual implementation of a class. Outside/external components that are outside of the control or scope of a codebase is something that gets addressed with integration tests. Were the focus is to exercise interaction between different components whether they are internal or external to a codebase. justinb is spot on unit tests responsibility is to test the actual implementation of a class. Outside/external components that are outside of the control or scope of a codebase is something that gets addressed with integration tests. Were the focus is to exercise interaction between different components whether they are internal or external to a codebase.

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