public void GivenEmptyVebTreeWhenFindThenAlwaysReturnFalse()
{
var tree = new VanEmdeBoasTree32();
var rand = new Random();
for (uint i = 0; i < 1 << 8; i++)
{
var elem = (uint)(rand.Next(1 << 30)) << 2 | (uint)(rand.Next(1 << 2));
Assert.False(tree.Find(elem));
}
}
public void GivenFullVebTreeWhenRemoveNumberThenFindCantFindIt()
{
var tree = new VanEmdeBoasTree32();
for (uint i = 0; i < 1 << 17; i++)
{
tree.Add(i);
}
for (uint i = 0; i < 1 << 17; i++)
{
tree.Remove(i);
Assert.False(tree.Find(i));
}
for (uint i = 0; i < 1 << 17; i++)
{
tree.Add(i);
}
for (uint i = 0; i < 1 << 17; i++)
{
var toRemove = (1 << 17) - 1 - i;
tree.Remove(toRemove);
Assert.False(tree.Find(toRemove));
}
}
public void GivenVebTreePopulatedWithOddNumbersWhenFindReturnsCorrectValue()
{
var tree = new VanEmdeBoasTree32();
for (uint i = 0; i < 1 << 8; i++)
{
if (i % 2 == 1)
{
tree.Add(i);
}
}
for (uint i = 0; i < 1 << 8; i++)
{
Assert.Equal(i % 2 == 1, tree.Find(i));
}
}
public void GivenPopulatedVebTreeWhenFindThenAlwaysReturnTrue()
{
var tree = new VanEmdeBoasTree32();
var rand = new Random();
var set = new HashSet <uint>();
for (int i = 0; i < 1 << 10; i++)
{
var elem = (uint)(rand.Next(1 << 30)) << 2 | (uint)(rand.Next(1 << 2));
set.Add(elem);
tree.Add(elem);
}
foreach (var elem in set)
{
Assert.True(tree.Find(elem));
}
}
