jeudi 4 juin 2020

How to write a @ParametrizedTest with two parameters with filtered values?

Consider my test class:

public class TestClass {

    static public class Vegetable {
         String name

         public Vegetable(String name) { ... }
    }

    static public class Fruit {
        String name;
        List<Vegetable> assignedVegs;

        public Fruit(String name, List<Vegetable> vegs) { ... }
    }

    List<Fruit> fruits = asList(
        new Fruit("Orange", asList(new Vegetable("Potato"))),
        new Fruit("Apple", asList(new Vegetable("Potato"), new Vegetable("Carot")))
    );         

    @ParametrizedTest
    public void test(Fruit f, Vegetable v) { ... }
}

I would like to run my test method with the following data combinations

  • ["Orange", "Potato"],
  • ["Apple", "Potato"],
  • ["Apple", "Carot"],

however, without adding further elements to fruits or changing the signature of test. What is the best way to achieve this using for example a @MethodSource? Or is there any more junit-like way to achieve a similar result? And what would be the approach if the parameter space was even higher dimensional?

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