public void SliceNotation()
{
// items start through stop-1
Assert.AreEqual("1:3", new Slice("1:3").ToString());
Assert.AreEqual("-5:-8", new Slice("-5:-8").ToString());
Assert.AreEqual("3:4", new Slice(3, 4).ToString());
Assert.AreEqual("7:8:9", new Slice(7, 8, 9).ToString());
Assert.AreEqual("7:8:9", new Slice("7:8:9").ToString());
// items start through the rest of the array
Assert.AreEqual("1:", new Slice("1:").ToString());
Assert.AreEqual("1:", new Slice(1).ToString());
Assert.AreEqual("1:", new Slice(1, null).ToString());
Assert.AreEqual("1:", new Slice(1, null, 1).ToString());
Assert.AreEqual("7::9", new Slice(7, null, 9).ToString());
Assert.AreEqual("7::9", new Slice("7::9").ToString());
// items from the beginning through stop-1
Assert.AreEqual(":2", new Slice(":2").ToString());
Assert.AreEqual(":2", new Slice(null, 2).ToString());
Assert.AreEqual(":2", new Slice(stop: 2).ToString());
Assert.AreEqual(":7:9", new Slice(null, 7, 9).ToString());
Assert.AreEqual(":7:9", new Slice(":7:9").ToString());
// slice a view of the whole array or matrix
Assert.AreEqual(":", new Slice(":").ToString());
Assert.AreEqual(":", new Slice().ToString());
Assert.AreEqual(":", new Slice(null, null).ToString());
Assert.AreEqual(":", new Slice(null, null, 1).ToString());
// step
Assert.AreEqual("::-1", new Slice("::- 1").ToString());
Assert.AreEqual("::2", new Slice(step: 2).ToString());
Assert.AreEqual("::2", new Slice(null, null, 2).ToString());
// pick exactly one item and reduce the dimension
Assert.AreEqual("17", new Slice("17").ToString());
// pick exactly one item but keep the dimension
Assert.AreEqual("17:18", new Slice("17:18").ToString());
// equality
Assert.AreEqual(new Slice("::- 1"), new Slice("::- 1"));
Assert.AreEqual(new Slice(":"), new Slice(":"));
Assert.AreEqual(new Slice(":7:9"), new Slice(":7:9"));
Assert.AreEqual(new Slice(":2"), new Slice(":2"));
Assert.AreEqual(new Slice("7::9"), new Slice("7::9"));
Assert.AreEqual(new Slice("7:8:9"), new Slice("7:8:9"));
Assert.AreEqual(new Slice("17"), new Slice("17"));
Assert.AreEqual(new Slice("-5:-8"), new Slice("-5:-8"));
Assert.AreEqual(new Slice("- 5:- 8"), new Slice("-5:-8"));
Assert.AreEqual(new Slice("+ 5:+ 8"), new Slice("+5:8"));
Assert.AreEqual(new Slice(" 5: 8"), new Slice("+5:8"));
Assert.AreEqual(new Slice("\r\n\t:\t "), new Slice(":"));
Assert.AreEqual(new Slice(":\t:\t \t1"), new Slice(":"));
Assert.AreEqual(new Slice(" : \t:\t \t2 "), new Slice("::2"));
// inequality
Assert.AreNotEqual(new Slice(":"), new Slice("1:"));
Assert.AreNotEqual(new Slice(":1"), new Slice("1:"));
Assert.AreNotEqual(new Slice(":8:9"), new Slice(":7:9"));
Assert.AreNotEqual(new Slice(":7:8"), new Slice(":7:9"));
Assert.AreNotEqual(new Slice(":-2"), new Slice(":2"));
Assert.AreNotEqual(new Slice("7::9"), new Slice("7::19"));
Assert.AreNotEqual(new Slice("17::9"), new Slice("7::9"));
Assert.AreNotEqual(new Slice("7:1:9"), new Slice("7::9"));
Assert.AreNotEqual(new Slice("7:8:9"), new Slice("7:18:9"));
Assert.AreNotEqual(new Slice("-5:-8"), new Slice("-5:-8:2"));
// Create functions
Assert.AreEqual(Slice.All(), new Slice(":"));
Assert.AreEqual(Slice.Index(17), new Slice("17:18"));
// invalid values
Assert.ThrowsException <ArgumentException>(() => new Slice(""));
Assert.ThrowsException <ArgumentException>(() => new Slice(":::"));
Assert.ThrowsException <ArgumentException>(() => new Slice("x"));
Assert.ThrowsException <ArgumentException>(() => new Slice("0.5:"));
Assert.ThrowsException <ArgumentException>(() => new Slice("0.00008"));
Assert.ThrowsException <ArgumentException>(() => new Slice("x:y:z"));
Assert.ThrowsException <ArgumentException>(() => new Slice("209572048752047520934750283947529083475"));
Assert.ThrowsException <ArgumentException>(() => new Slice("209572048752047520934750283947529083475:"));
Assert.ThrowsException <ArgumentException>(() => new Slice(":209572048752047520934750283947529083475:2"));
Assert.ThrowsException <ArgumentException>(() => new Slice("::209572048752047520934750283947529083475"));
}
