public void Shuffle_Empty_Test()
{
int[] actual = new int[0];
int[] expected = new int[0];
SortingUtils.Shuffle(actual);
CollectionAssert.AreEquivalent(expected, actual);
}
public void ShuffleTest()
{
int[] actual = new int[] { -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int[] expected = new int[] { 8, 10, 5, 1, -1, 6, 9, 3, 0, 4, 2, 7 };
SortingUtils.Shuffle(actual);
// Two collections are equivalent if they have the same elements in the same quantity, but in any order.
CollectionAssert.AreEquivalent(expected, actual, "The shuffle did not shuffle correctly");
}
public void Shuffle_SuppliedRNG_Test()
{
// using rng with a fixed seed so we can compare this shuffle against a previous shuffle with the same seed.
var random = new Random(1024);
int[] actual = new int[] { -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int[] expected = new int[] { 8, 10, 5, 1, -1, 6, 9, 3, 0, 4, 2, 7 };
SortingUtils.Shuffle(actual, random);
CollectionAssert.AreEqual(expected, actual, "The shuffle did not produce the expected result");
}