public void RemoveDuplicateElementsTest(int[] source, int[] expected)
{
var list1 = new VSArray <int>(source);
// Create new list, don't modify original
var list2 = list1.GetRemoveDuplicateElements();
Assert.That(list1, Is.EqualTo(source.ToVSArray()));
Assert.That(list2, Is.EqualTo(expected.ToVSArray()));
// Modify original (in-place)
list1.RemoveDuplicateElements();
Assert.That(list1, Is.EqualTo(expected.ToList()));
Assert.That(list1, Is.EqualTo(list2));
}