public void CheckNextPermutation(int[] nums, int[] expected)
{
var sol = new NextPermutation();
sol.FindNextPermutation(nums);
Assert.Equal(nums, expected);
}
public void FindNextPermutation(int[] input, int[] expected)
{
var sut = new NextPermutation();
sut.FindNextPermutation(input);
Assert.AreEqual(expected, input);
}