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Asked: 2026-05-12T22:54:28+00:00

Some of NUnit ‘s Assert methods are overloaded to use ICollection but not ICollection<T>

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Some of NUnit‘s Assert methods are overloaded to use ICollection but not ICollection<T> and thus you can’t use them.

Is there anyway around this? Heck, am I doing something stupid?

I’m having to drop back to using Assert.AreEqual rather than specialised methods and its making my tests ugly.

Any advice?

Edit:

Thanks for the responses. The That method of NUnit seems interesting so I’ll look into it at a later date.

Mark correctly mentioned this, but NUnit Collection Asserts are excellent. I’ve recently used them on some new tests and found them excellent to work with.

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1 Answer

  1. Editorial Team

    ICollection and ICollection<T> are different contracts – one does not inherit the other.

    http://msdn.microsoft.com/en-us/library/system.collections.icollection_members.aspx
    http://msdn.microsoft.com/en-us/library/y2fx0ty0.aspx

    If you have a generic collection you can call ToList() on it and get a List<T>, which happens to implement the non-generic ICollection as well. Then use that List in the NUnit Assert method.

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