DatapointSource
The DatapointSource attribute is used to provide data for Theories and is ignored for ordinary tests - including tests with parameters.
Collections of datapoints may be provided by use of the DatapointSourceAttribute.
This attribute may be placed on methods or
properties in addition to fields. The returned value must be
either an array of the required type or an IEnumerable<T> returning an enumeration
of the required type. The data Type must exactly match the argument
for which data is being supplied.
In earlier versions of NUnit, the obsolete DatapointsAttribute was used in place of DatapointSourceAttribute.
Automatically Supplied Datapoints
It is normally not necessary to specify datapoints for boolean or enum arguments. NUnit automatically supplies values of true and false for boolean arguments and will supply all defined values of any enumeration.
If for some reason you don't wish to use all possible values, you can override this behavior by supplying your own datapoints. If you supply any datapoints for an argument, automatic datapoint generation is suppressed.
Example
For an example of use, see Theory Attribute