public void Indexing_1D()
{
var data = new ArraySlice <int>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
// return identical view
var view = new ArraySlice <int>(data, ":");
Assert.AreEqual(0, view.GetValue(0));
Assert.AreEqual(5, view.GetValue(5));
Assert.AreEqual(9, view.GetValue(9));
view = new ArraySlice <int>(data, "-77:77");
Assert.AreEqual(0, view.GetValue(0));
Assert.AreEqual(5, view.GetValue(5));
Assert.AreEqual(9, view.GetValue(9));
// return reduced view
view = new ArraySlice <int>(data, "7:");
Assert.AreEqual(7, view.GetValue(0));
Assert.AreEqual(8, view.GetValue(1));
Assert.AreEqual(9, view.GetValue(2));
view = new ArraySlice <int>(data, ":5");
Assert.AreEqual(0, view.GetValue(0));
Assert.AreEqual(1, view.GetValue(1));
Assert.AreEqual(2, view.GetValue(2));
Assert.AreEqual(3, view.GetValue(3));
Assert.AreEqual(4, view.GetValue(4));
view = new ArraySlice <int>(data, "2:3");
Assert.AreEqual(2, view.GetValue(0));
// return stepped view
view = new ArraySlice <int>(data, "::2");
Assert.AreEqual(0, view.GetValue(0));
Assert.AreEqual(2, view.GetValue(1));
Assert.AreEqual(4, view.GetValue(2));
Assert.AreEqual(6, view.GetValue(3));
Assert.AreEqual(8, view.GetValue(4));
view = new ArraySlice <int>(data, "::3");
Assert.AreEqual(0, view.GetValue(0));
Assert.AreEqual(3, view.GetValue(1));
Assert.AreEqual(6, view.GetValue(2));
Assert.AreEqual(9, view.GetValue(3));
view = new ArraySlice <int>(data, "-77:77:77");
Assert.AreEqual(0, view.GetValue(0));
// negative step!
view = new ArraySlice <int>(data, "::-1");
Assert.AreEqual(9, view.GetValue(0));
Assert.AreEqual(4, view.GetValue(5));
Assert.AreEqual(0, view.GetValue(9));
view = new ArraySlice <int>(data, "::-2");
Assert.AreEqual(9, view.GetValue(0));
Assert.AreEqual(7, view.GetValue(1));
Assert.AreEqual(5, view.GetValue(2));
Assert.AreEqual(3, view.GetValue(3));
Assert.AreEqual(1, view.GetValue(4));
view = new ArraySlice <int>(data, "::-3");
Assert.AreEqual(9, view.GetValue(0));
Assert.AreEqual(6, view.GetValue(1));
Assert.AreEqual(3, view.GetValue(2));
Assert.AreEqual(0, view.GetValue(3));
view = new ArraySlice <int>(data, "-77:77:-77");
Assert.AreEqual(9, view.GetValue(0));
}
public void BasicTests()
{
var a = new ArraySlice <int>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
// enumerable?
Assert.AreEqual(new[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }, a);
Assert.AreNotEqual(new[] { 0, 1, 2, 3, 4444, 5, 6, 7, 8, 9 }, a);
Assert.AreEqual(new ArraySlice <int>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9), a);
// auto shape
Assert.AreEqual(new Shape(10), a.Shape);
// indexing
Assert.AreEqual(0, a[0]);
Assert.AreEqual(5, a[5]);
Assert.AreEqual(9, a[9]);
Assert.AreEqual(0, a.GetValue(0));
Assert.AreEqual(5, a.GetValue(5));
Assert.AreEqual(9, a.GetValue(9));
// length (for 1-D arrayslices, first dimension for N-D)
Assert.AreEqual(10, a.Length);
}