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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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DUnitX: now has a WillRaiseAttribute to ease defining tests around code that should throw exceptions

Posted by jpluimers on 2018/08/29

I stumbled over this commit message in [WayBack] “extended the TestAttribute with “Expected” property (#181)” which isn’t phrased correctly, but adds a very nice feature.

The feature is about WillRaiseAttribute:

constructor WillRaiseAttribute.Create(AExpectedException: ExceptClass; const AInheritance: TExceptionInheritance);

This allows tests like these:

    procedure FailMe;

    [WillRaise(EHeapException, exDescendant)]
    procedure FailMeToo;

    [WillRaise(Exception, exDescendant)]
    procedure FailAny;

    [Ignore('I am not behaving as I should')]
    procedure IgnoreMeCauseImWrong;


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