public void TestIListExtensions()
{
// Shuffle, Last Index
{
int[] values = new int[] { 1, 2, 3, 4, 5 };
Assert.AreEqual(4, values.LastIndex());
int[] shuffled = (int[])values.Clone();
shuffled.Shuffle();
Assert.AreNotEqual(values, shuffled);
}
// Swap
{
int[] values = new int[] { 1, 2, 3, 4, 5 };
values.SwapAtIndex(0, 4);
Assert.AreEqual(values, new int[] { 5, 2, 3, 4, 1 });
values.Swap(1, 5);
Assert.AreEqual(values, new int[] { 1, 2, 3, 4, 5 });
}
// First, Last, Random
{
int[] values = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Assert.AreEqual(1, values.First());
Assert.AreEqual(9, values.Last());
// You see, random can end up hitting the same index... since it's random
int a = values.Random();
int b = -1;
for (int i = 0; i < values.Length; ++i)
{
b = values.Random();
if (a != b)
{
break;
}
}
Assert.AreNotEqual(a, b);
}
// Remove First/Last
{
List <int> values = new List <int>()
{
1, 2, 3, 4
};
values.RemoveFirst();
values.RemoveLast();
Assert.AreEqual(2, values.First());
Assert.AreEqual(3, values.Last());
}
// Has Index, AtIndexOrDefault
{
TestDataObject a = new TestDataObject("A", 1);
TestDataObject[] values = new TestDataObject[]
{
a
};
Assert.False(values.HasIndex(-1));
Assert.True(values.HasIndex(0));
Assert.False(values.HasIndex(1));
Assert.AreEqual(a, values.AtIndexOrDefault(0));
Assert.AreEqual(a, values.AtIndexOrDefault(5, a));
}
}