Recently, I had to come up with a unit test to test a certain functionality for each value of an enum. Let's say the enum is something like this: public enum Number { One = 1 , Two , Three , Four , Five , Six } The unit test I wrote first was: [ Theory ] [ InlineData ( Number . One )] [ InlineData ( Number . Two )] [ InlineData ( Number . Three )] [ InlineData ( Number . Four )] [ InlineData ( Number . Five )] [ InlineData ( Number . Six )] public void TestNumber ( Number number ) { Assert . Equal ( true , ( Convert . ToInt32 ( number ) > 0 )); } Though it worked fine for the given situation, I wanted a better way to do this so that that even if more values were added to the enum in the future, the test would still work without needing changes. Fortunate