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 TestMutabilification()
{
// Make a single block mutable
VList <int> v = new VList <int>(1, 0);
WList <int> w = v.ToWList();
ExpectList(w, 1, 0);
w[1] = 2;
ExpectList(w, 1, 2);
ExpectList(v, 1, 0);
// Make another block, make the front block mutable, then the block-of-2
v.Push(-1);
w = v.ToWList();
w[2] = 3;
ExpectList(w, 1, 0, 3);
Assert.That(w.WithoutLast(1) == v.WithoutLast(1));
w[1] = 2;
ExpectList(w, 1, 2, 3);
Assert.That(w.WithoutLast(1) != v.WithoutLast(1));
// Now for a more complicated case: create a long immutable chain by
// using a nasty access pattern, add a mutable block in front, then
// make some of the immutable blocks mutable. This will cause several
// immutable blocks to be consolidated into one mutable block,
// shortening the chain.
v = new VList <int>(6);
v = v.Add(-1).Tail.Add(5).Add(-1).Tail.Add(4).Add(-1).Tail.Add(3);
v = v.Add(-1).Tail.Add(2).Add(-1).Tail.Add(1).Add(-1).Tail.Add(0);
ExpectList(v, 6, 5, 4, 3, 2, 1, 0);
// At this point, every block in the chain has only one item (it's
// a linked list!) and the capacity of each block is 2.
Assert.AreEqual(7, v.BlockChainLength);
w = v.ToWList();
w.AddRange(new int[] { 1, 2, 3, 4, 5 });
Assert.AreEqual(w.Count, 12);
ExpectList(w, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5);
// Indices: 0 1 2 3 4 5 6 7 8 9 10 11
// Blocks: H| G| F| E| D| C| B | block A (front of chain)
Assert.AreEqual(8, w.BlockChainLength);
Assert.AreEqual(4, w.LocalCount);
w[3] = -3;
ExpectList(w, 6, 5, 4, -3, 2, 1, 0, 1, 2, 3, 4, 5);
// Indices: 0 1 2 3 4 5 6 7 8 9 10 11
// Blocks: H| G| F| block I | block A (front of chain)
Assert.AreEqual(5, w.BlockChainLength);
}
public void TestInsertRemove()
{
WList <int> list = new WList <int>();
for (int i = 0; i <= 12; i++)
{
list.Insert(0, i);
}
ExpectList(list, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
for (int i = 1; i <= 6; i++)
{
list.RemoveAt(i);
}
ExpectList(list, 12, 10, 8, 6, 4, 2, 0);
Assert.AreEqual(0, list.Pop());
list.Insert(1, -2);
ExpectList(list, 12, -2, 10, 8, 6, 4, 2);
list.Insert(2, -1);
ExpectList(list, 12, -2, -1, 10, 8, 6, 4, 2);
Assert.That(list.Remove(-1));
Assert.That(list.Remove(12));
list[0] = 12;
ExpectList(list, 12, 10, 8, 6, 4, 2);
// Make sure WList.Clear doesn't disturb FVList
VList <int> v = list.WithoutLast(4);
list.Clear();
ExpectList(list);
ExpectList(v, 12, 10);
// Some simple InsertRange calls where some immutable items must be
// converted to mutable
VList <int> oneTwo = new VList <int>(1, 2);
VList <int> threeFour = new VList <int>(3, 4);
list = oneTwo.ToWList();
list.InsertRange(1, threeFour);
ExpectList(list, 1, 3, 4, 2);
list = threeFour.ToWList();
list.InsertRange(0, oneTwo);
ExpectList(list, 1, 2, 3, 4);
// More tests...
list.RemoveRange(2, 2);
ExpectList(list, 1, 2);
list.InsertRange(2, new int[] { 3, 3, 4, 4, 4, 5, 6, 7, 8, 9 });
ExpectList(list, 1, 2, 3, 3, 4, 4, 4, 5, 6, 7, 8, 9);
list.RemoveRange(3, 3);
ExpectList(list, 1, 2, 3, 4, 5, 6, 7, 8, 9);
v = list.ToVList();
list.RemoveRange(5, 4);
ExpectList(list, 1, 2, 3, 4, 5);
ExpectList(v, 1, 2, 3, 4, 5, 6, 7, 8, 9);
}
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);
}
public void TestFork()
{
WList <int> A = new WList <int>();
A.AddRange(new int[] { 1, 2, 3 });
WList <int> B = A.Clone();
A.Push(4);
ExpectList(B, 1, 2, 3);
ExpectList(A, 1, 2, 3, 4);
B.Push(-4);
ExpectList(B, 1, 2, 3, -4);
Assert.That(A.WithoutLast(2) == B.WithoutLast(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 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);
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 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));
}