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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Jun 4, 2001

Testing a Business Rule Should Not Have Any Side Effects


Testing a business rule should have no side effects. Avoid err.raise and msgboxes inside business rule tests.

Consider this example:
 
public const kMinimumApplicantAge = 18  'declared in common mod

Public Function IsApplicantAgeEligible(DOB as date, testDate 
as date) as
boolean

    If datediff(
Patrick Marshall
 
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