IParameterDataSource Interface

The IParameterDataSource interface is implemented by attributes that provide data for use as an argument to a single paramerter. Other attributes and test builders combine the values in various ways to produce test cases. The interface is defined as follows:

public interface IParameterDataSource
{
    IEnumerable GetData(IParameterInfo parameter);
}

IParameterInfo is an NUnit internal class used to wrap a ParameterInfo. See the source code for more info.

A custom attribute implementing this interface should examine the IParameterInfo and return data values that are compatible with the parameter. The attribute has no control over how this data is combined with other arguments - that's up to other attributes and ultimately NUnit itself.

The following NUnit attributes currently implement IParameterDataSource:

• RandomAttribute
• ValuesAttribute, with the derived class
  • RangeAttribute
• ValueSourceAttribute