public void test_evaluation()
        {
            NodeCreator creator = new NodeCreator(seed: 7, maxVariable: 0);

            for (int i = 0; i < 10000; i++)
            {
                var node = creator.RandomNode(50, 500);
                Assert.That(node.Depth, Is.LessThanOrEqualTo(50));
                Assert.That(node.Count, Is.LessThanOrEqualTo(500));
            }
        }