public void TestEmptyListOperations()
{
WList <int> a = new WList <int>();
WList <int> b = new WList <int>();
a.AddRange(b);
a.InsertRange(0, b);
a.RemoveRange(0, 0);
Assert.That(!a.Remove(0));
Assert.That(a.IsEmpty);
Assert.That(a.WithoutLast(0).IsEmpty);
a.Add(1);
Assert.That(a.WithoutLast(1).IsEmpty);
b.AddRange(a);
ExpectList(b, 1);
b.RemoveAt(0);
Assert.That(b.IsEmpty);
b.InsertRange(0, a);
ExpectList(b, 1);
b.RemoveRange(0, 1);
Assert.That(b.IsEmpty);
b.Insert(0, a[0]);
ExpectList(b, 1);
b.Remove(a.Last);
Assert.That(b.IsEmpty);
}
public void TestSelect()
{
WList <int> one = new WList <int>(); one.Add(3);
WList <int> two = one.Clone(); two.Add(2);
WList <int> thr = two.Clone(); thr.Add(1);
ExpectList(thr, 3, 2, 1);
ExpectList(one.Select(delegate(int i) { return(i + 1); }), 4);
ExpectList(two.Select(delegate(int i) { return(i + 1); }), 4, 3);
ExpectList(thr.Select(delegate(int i) { return(i + 1); }), 4, 3, 2);
ExpectList(two.Select(delegate(int i) { return(i == 3 ? 3 : 0); }), 3, 0);
ExpectList(thr.Select(delegate(int i) { return(i == 3 ? 3 : 0); }), 3, 0, 0);
ExpectList(thr.Select(delegate(int i) { return(i == 1 ? 0 : i); }), 3, 2, 0);
Assert.That(one.SmartSelect(delegate(int i) { return(i); }).ToVList() == one.ToVList());
Assert.That(two.SmartSelect(delegate(int i) { return(i); }).ToVList() == two.ToVList());
Assert.That(thr.SmartSelect(delegate(int i) { return(i); }).ToVList() == thr.ToVList());
ExpectList(one.SmartSelect(delegate(int i) { return(i + 1); }), 4);
ExpectList(two.SmartSelect(delegate(int i) { return(i + 1); }), 4, 3);
ExpectList(thr.SmartSelect(delegate(int i) { return(i + 1); }), 4, 3, 2);
ExpectList(two.SmartSelect(delegate(int i) { return(i == 3 ? 3 : 0); }), 3, 0);
ExpectList(thr.SmartSelect(delegate(int i) { return(i == 3 ? 3 : 0); }), 3, 0, 0);
ExpectList(thr.SmartSelect(delegate(int i) { return(i == 1 ? 0 : i); }), 3, 2, 0);
Assert.That(thr.SmartSelect(delegate(int i) { return(i == 1 ? 0 : i); }).WithoutLast(1) == thr.WithoutLast(1));
}
public void TestWhere()
{
WList <int> one = new WList <int>(); one.Add(3);
WList <int> two = one.Clone(); two.Add(2);
WList <int> thr = two.Clone(); thr.Add(1);
ExpectList(one.Where(delegate(int i) { return(false); }));
ExpectList(two.Where(delegate(int i) { return(false); }));
ExpectList(thr.Where(delegate(int i) { return(false); }));
Assert.That(one.Where(delegate(int i) { return(true); }).ToVList() == one.ToVList());
Assert.That(two.Where(delegate(int i) { return(true); }).ToVList() == two.ToVList());
Assert.That(thr.Where(delegate(int i) { return(true); }).ToVList() == thr.ToVList());
Assert.That(two.Where(delegate(int i) { return(i == 3); }).ToVList() == two.WithoutLast(1));
Assert.That(thr.Where(delegate(int i) { return(i == 3); }).ToVList() == thr.WithoutLast(2));
Assert.That(thr.Where(delegate(int i) { return(i > 1); }).ToVList() == thr.WithoutLast(1));
ExpectList(two.Where(delegate(int i) { return(i == 2); }), 2);
ExpectList(thr.Where(delegate(int i) { return(i == 2); }), 2);
}
private void TestTransform(int count, int[] expect, int commonTailLength, params XfAction[] actions)
{
WList <int> list = new WList <int>();
for (int i = 0; i < count; i++)
{
list.Add(i + 1);
}
int counter = 0;
WList <int> result =
list.Transform(delegate(int i, ref int item) {
if (i >= 0)
{
Assert.AreEqual(list[i], item);
}
item *= 10;
return(actions[counter++]);
});
Assert.AreEqual(counter, actions.Length);
ExpectList(result, expect);
Assert.That(result.WithoutLast(result.Count - commonTailLength)
== list.WithoutLast(list.Count - commonTailLength));
// Try to ensure there's no shared mutable memory by trashing the
// result starting at the head, and verifying the original list
for (int i = result.Count - 1; i >= 0; i--)
{
result[i] = -1;
}
Assert.AreEqual(count, list.Count);
for (int i = 0; i < count; i++)
{
Assert.AreEqual(i + 1, list[i]);
}
}
public void TestFalseOwnership()
{
// This test tries to make sure a WList doesn't get confused about what
// blocks it owns. It's possible for a WList to share a partially-mutable
// block that contains mutable items with another WList, but only one
// WList owns the items.
// Case 1: two WLists point to the same block but only one owns it:
//
// block 0
// owned by A
// |____3| block 1
// |____2| unowned
// A,B--->|Imm_1|--->|Imm_1|
// |____0| |____0|
//
// (The location of "Imm" in each block denotes the highest immutable
// item; this diagram shows there are two immutable items in each
// block)
WList <int> A = new WList <int>();
A.Resize(4);
for (int i = 0; i < 4; i++)
{
A[i] = i;
}
WList <int> B = A.Clone();
// B can't add to the second block because it's not the owner, so a
// third block is created when we Add(1).
B.Add(4);
A.Add(-4);
ExpectList(A, 0, 1, 2, 3, -4);
ExpectList(B, 0, 1, 2, 3, 4);
Assert.AreEqual(2, A.BlockChainLength);
Assert.AreEqual(3, B.BlockChainLength);
// Case 2: two WLists point to different blocks but they share a common
// tail, where one list owns part of the tail and the other does not:
//
// block 0
// owned by B
// |____8|
// |____7|
// |____6|
// |____5| block 1
// |____4| owned by A
// |____3| A |____3| block 2
// |____2| | |____2| unowned
// |____1|---+---->|Imm_1|---->|Imm_1|
// B--->|____0| |____0| |____0|
// mutable
//
// Actually the previous test puts us in just this state.
//
// I can't think of a test that uses the public interface to detect bugs
// in this case. The most important thing is that B._block.PriorIsOwned
// returns false.
Assert.That(B.IsOwner && !B.Block.PriorIsOwned);
Assert.That(A.IsOwner);
Assert.That(B.Block.Prior.ToVList() == A.WithoutLast(1));
}
public void SimpleTests()
{
// Tests simple adds and removes from the front of the list. It
// makes part of its tail immutable, but doesn't make it mutable
// again. Also, we test operations that don't modify the list.
WList <int> list = new WList <int>();
Assert.That(list.IsEmpty);
// create VListBlockOfTwo
list = new WList <int>(10, 20);
ExpectList(list, 10, 20);
// Add()
list.Clear();
list.Add(1);
Assert.That(!list.IsEmpty);
list.Add(2);
Assert.AreEqual(1, list.BlockChainLength);
list.Add(3);
Assert.AreEqual(2, list.BlockChainLength);
ExpectList(list, 1, 2, 3);
VList <int> snap = list.ToVList();
ExpectList(snap, 1, 2, 3);
// AddRange(), Push(), Pop()
list.Push(4);
list.AddRange(new int[] { 5, 6 });
ExpectList(list, 1, 2, 3, 4, 5, 6);
Assert.AreEqual(list.Pop(), 6);
ExpectList(list, 1, 2, 3, 4, 5);
list.RemoveRange(3, 2);
ExpectList(list, 1, 2, 3);
// Double the list
list.AddRange(list);
ExpectList(list, 1, 2, 3, 1, 2, 3);
list.RemoveRange(3, 3);
// Fill a third block
list.AddRange(new int[] { 4, 5, 6, 7, 8, 9 });
list.AddRange(new int[] { 10, 11, 12, 13, 14 });
ExpectList(list, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14);
// Remove(), enumerator
list.Remove(14);
list.Remove(13);
list.Remove(12);
list.Remove(11);
ExpectListByEnumerator(list, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
// IndexOutOfRangeException
AssertThrows <IndexOutOfRangeException>(delegate() { int i = list[-1]; });
AssertThrows <IndexOutOfRangeException>(delegate() { int i = list[10]; });
AssertThrows <IndexOutOfRangeException>(delegate() { list.Insert(-1, -1); });
AssertThrows <IndexOutOfRangeException>(delegate() { list.Insert(list.Count + 1, -1); });
AssertThrows <IndexOutOfRangeException>(delegate() { list.RemoveAt(-1); });
AssertThrows <IndexOutOfRangeException>(delegate() { list.RemoveAt(list.Count); });
// Front, Contains, IndexOf
Assert.That(list.Last == 10);
Assert.That(list.Contains(9));
Assert.That(list[list.IndexOf(2)] == 2);
Assert.That(list[list.IndexOf(9)] == 9);
Assert.That(list[list.IndexOf(7)] == 7);
Assert.That(list.IndexOf(-1) == -1);
// snap is still the same
ExpectList(snap, 1, 2, 3);
}