Comments on: Tests should last forever http://www.tigraine.at/2009/03/25/tests-should-last-forever/ Daniel Hoelbling talks about programming Tue, 31 Jan 2012 08:32:00 +0000 hourly 1 http://wordpress.org/?v= By: Tigraine » Blog Archive » Good ideas worth spreading: SystemDateTime abstractions http://www.tigraine.at/2009/03/25/tests-should-last-forever/comment-page-1/#comment-5401 Tigraine » Blog Archive » Good ideas worth spreading: SystemDateTime abstractions Thu, 16 Sep 2010 17:04:46 +0000 http://www.tigraine.at/2009/03/25/tests-should-last-forever/#comment-5401 [...] stated before: Don’t make your tests depend on external factors like the current time or Date, and I even had a solution until now that solved the problem rather [...] [...] stated before: Don’t make your tests depend on external factors like the current time or Date, and I even had a solution until now that solved the problem rather [...]

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]]> By: Tigraine » Blog Archive » Beggars can’t be choosers: Dependency injection through global factories http://www.tigraine.at/2009/03/25/tests-should-last-forever/comment-page-1/#comment-3368 Tigraine » Blog Archive » Beggars can’t be choosers: Dependency injection through global factories Wed, 14 Oct 2009 16:34:49 +0000 http://www.tigraine.at/2009/03/25/tests-should-last-forever/#comment-3368 [...] Oh, and btw: The example I did above was chosen deliberately to be something as simple as a abstraction of DateTime.Now. As said before, never depend on moving parts in your tests. [...] [...] Oh, and btw: The example I did above was chosen deliberately to be something as simple as a abstraction of DateTime.Now. As said before, never depend on moving parts in your tests. [...]

]]> By: Tigraine http://www.tigraine.at/2009/03/25/tests-should-last-forever/comment-page-1/#comment-2476 Tigraine Thu, 26 Mar 2009 22:35:39 +0000 http://www.tigraine.at/2009/03/25/tests-should-last-forever/#comment-2476 The whole point of the posting was that if you initialize a variable in your test to DateTime.Now, your test changes dynamically at runtime. So if your code under test makes some checks to that variable, you'll end up with a test that isn't running 100% of the time.<br><br>If you initialize the variable to some fixed date where you know it should pass (like 1.1.2009 14:00), you can rerun the test under any condition, it will still pass as long as the code works as expected. The whole point of the posting was that if you initialize a variable in your test to DateTime.Now, your test changes dynamically at runtime. So if your code under test makes some checks to that variable, you'll end up with a test that isn't running 100% of the time.

If you initialize the variable to some fixed date where you know it should pass (like 1.1.2009 14:00), you can rerun the test under any condition, it will still pass as long as the code works as expected.

]]> By: Harald Logar http://www.tigraine.at/2009/03/25/tests-should-last-forever/comment-page-1/#comment-2474 Harald Logar Thu, 26 Mar 2009 14:05:17 +0000 http://www.tigraine.at/2009/03/25/tests-should-last-forever/#comment-2474 Hello Daniel, <br><br>you are absolutly right about this point. But how can you manage to test a function which only works for the current day or the current week? In this case you also must have test which changes every day. But you have to think about a lot of things. Maybe the function does not work on sunday or only between 8 and 16 etc. <br><br>best regards<br>Harald Hello Daniel,

you are absolutly right about this point. But how can you manage to test a function which only works for the current day or the current week? In this case you also must have test which changes every day. But you have to think about a lot of things. Maybe the function does not work on sunday or only between 8 and 16 etc.

best regards
Harald

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