public void Given_231_Then_312()
{
//Arrange
var permutationGenerator = new NextGreaterPermutation();
var actual = new int[] { 2, 3, 1 };
var expected = new int[] { 3, 1, 2 };
//Action
permutationGenerator.NextPermutation(actual);
//Assert
CollectionAssert.AreEqual(expected, actual);
}
public void Given_NoNextGreaterPermutation321_Then_ReturnMinimumPermutation123()
{
//Arrange
var permutationGenerator = new NextGreaterPermutation();
var actual = new int[] { 3, 2, 1 };
var expected = new int[] { 1, 2, 3 };
//Action
permutationGenerator.NextPermutation(actual);
//Assert
CollectionAssert.AreEqual(expected, actual);
}
//[TestMethod()]
public void Given_5264_Then_5462()
{
//Arrange
var permutationGenerator = new NextGreaterPermutation();
var actual = new int[] { 7, 2, 6, 5, 4 };
var expected = new int[] { 7, 4, 6, 5, 2 };
//Action
permutationGenerator.NextPermutation(actual);
//Assert
CollectionAssert.AreEqual(expected, actual);
}