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Making sure all IWorker implementers call CanHandle from Handle without a mocking framework


You have an interface that allows you to treat all worker classes – classes that handle a specific type of work – as just one type: IWorker;

You want your worker classes to be able to do their work without having to check their backs every step of the way.

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Posted in Unit Testing
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4 surprises with asserts moving from Delphi to C#


Moving from Delphi to C# is fun most of the time.

Discovering stuff I can do in C# that is impossible, or (very) time consuming, in Delphi is fun. Discovering that stuff I take for granted in Delphi – i.e. metaclasses (officially “class references”),

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Posted in Software Development
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Act like a pessimist and call CanHandle from Handle (again)?

You have multiple Worker classes that can each handle a one or more types of command. Your IWorker interface offers two methods: CanHandle and Handle.


Anyone with work to be done can now find a worker that says “yay, I can handle this” and then pass off the work to that worker.

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Posted in Software Design
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