+1  A: 

You need a variant form of .Add (or of CreateTransaction) that lets you "inject" a (fake) date, exactly for such testing purposes.

Alex Martelli  2009-05-25 18:06:03
A: 

You can use the same techniques as described in "How do I unit test for machine specific behaviour?", to inject/use/create/test with specific dates.

ChrisW  2009-05-25 18:12:44

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