public void TestRoulette3()
{
var l = BufUtils.Populate <float>(() => BufUtils.RandomInt(2) == 0 ? 0f : BufUtils.RandomFloat(100000), 10000);
var r = new I2PCore.Utils.RouletteSelection <float, float>(l, v => v, k => k, 2f);
int iszero = 0;
for (int i = 0; i < 10000; ++i)
{
if (r.GetWeightedRandom() == 0f)
{
++iszero;
}
}
Assert.IsTrue(iszero > 10000 / 5);
Assert.IsTrue(iszero < 10000 / 2);
r = new I2PCore.Utils.RouletteSelection <float, float>(l, v => v, k => k, float.MaxValue);
iszero = 0;
for (int i = 0; i < 10000; ++i)
{
if (r.GetWeightedRandom() == 0f)
{
++iszero;
}
}
Assert.IsTrue(iszero < 4);
}
public void TestRoulette()
{
var l = BufUtils.RandomBytes(10000).AsEnumerable();
var r = new I2PCore.Utils.RouletteSelection <byte, byte>(l, v => v, k => k == 42 ? 30f : 1f);
int is42 = 0;
int samples = 10000;
for (int i = 0; i < samples; ++i)
{
if (r.GetWeightedRandom(null) == 42)
{
++is42;
}
}
Assert.IsTrue(is42 > (3 * samples) / 256);
}
public void TestRoulette2()
{
var l = BufUtils.RandomBytes(10000).AsEnumerable();
l = l.Concat(BufUtils.Populate <byte>(42, 10000));
var r = new I2PCore.Utils.RouletteSelection <byte, byte>(l, v => v, k => 1f);
int is42 = 0;
int samples = 10000;
for (int i = 0; i < samples; ++i)
{
if (r.GetWeightedRandom(null) == 42)
{
++is42;
}
}
Assert.IsTrue(is42 > samples / 1000);
}
public void TestRoulette3()
{
var populationcount = RouletteSelection <float, float> .IncludeTop;
var samplecount = 50000;
var l = BufUtils.Populate <float>(() => BufUtils.RandomInt(2) == 0 ? 0f : BufUtils.RandomFloat(100000), populationcount);
var r = new I2PCore.Utils.RouletteSelection <float, float>(l, v => v, k => k);
int iszero = 0;
for (int i = 0; i < samplecount; ++i)
{
if (r.GetWeightedRandom(null) < float.Epsilon)
{
++iszero;
}
}
Assert.IsTrue(iszero > 0);
Assert.IsTrue(iszero < samplecount / 2);
}