public void Can_remove_item_at_index()
{
var z = ImZipper.Zip(15, 10, 5, 1);
z = z.RemoveAt(2);
CollectionAssert.AreEqual(new[] { 15, 10, 1 }, z.ToArray());
z = z.RemoveAt(2);
CollectionAssert.AreEqual(new[] { 15, 10 }, z.ToArray());
z = z.RemoveAt(0);
CollectionAssert.AreEqual(new[] { 10 }, z.ToArray());
var z1 = z.RemoveAt(5);
Assert.AreSame(z, z1);
var z2 = z.RemoveAt(-5);
Assert.AreSame(z, z2);
z = z.RemoveAt(0);
CollectionAssert.AreEqual(new int[] {}, z.ToArray());
var z3 = z.RemoveAt(0);
Assert.AreSame(z, z3);
}
public void Can_efficiently_update_at_specific_index()
{
var z = ImZipper.Zip(1, 5, 10, 15);
z = z.UpdateAt(1, n => n + 1);
var s = z.ToString();
CollectionAssert.AreEqual(new[] { 1, 6, 10, 15 }, z.ToArray());
z = z.UpdateAt(0, i => i + 1);
CollectionAssert.AreEqual(new[] { 2, 6, 10, 15 }, z.ToArray());
z = z.UpdateAt(3, i => i + 1);
CollectionAssert.AreEqual(new[] { 2, 6, 10, 16 }, z.ToArray());
var z1 = z.UpdateAt(-5, i => i + 1);
Assert.AreSame(z, z1);
var z2 = z1.UpdateAt(5, i => i + 1);
Assert.AreSame(z1, z2);
var newList = z.UpdateAt(1, i => i);
Assert.AreNotSame(z, newList);
CollectionAssert.AreEqual(new[] { 2, 6, 10, 16 }, z.ToArray());
}
public void Map_x()
{
var l = ImList.List(5, 6, 7);
var ml = l.Map((_, i) => i);
CollectionAssert.AreEqual(new[] { 0, 1, 2 }, ml.ToArray());
var z = ImZipper.Zip(5, 6, 7);
var mz = z.Map((_, i) => i);
CollectionAssert.AreEqual(new[] { 0, 1, 2 }, mz.ToArray());
}
