JUnit Theories: Why can't I use Lists (instead of arrays) as DataPoints?
- by MatrixFrog
I've started using the new(ish) JUnit Theories feature for parameterizing tests. If your Theory is set up to take, for example, an Integer argument, the Theories test runner picks up any Integers marked with @DataPoint:
@DataPoint
public static Integer number = 0;
as well as any Integers in arrays:
@DataPoints
public static Integer[] numbers = {1, 2, 3};
or even methods that return arrays like:
@DataPoints
public static Integer[] moreNumbers() { return new Integer[] {4, 5, 6};};
but not in Lists. The following does not work:
@DataPoints
public static List<Integer> numberList = Arrays.asList(7, 8, 9);
Am I doing something wrong, or do Lists really not work? Was it a conscious design choice not to allow the use Lists as data points, or is that just a feature that hasn't been implemented yet? Are there plans to implement it in a future version of JUnit?
