public void BadSeed()
{
var seed = (0u, 0u, 0u, 0u);
var rng1 = XorShift.GetFactory().Create(seed);
var num1 = rng1.NextUInt64();
var num2 = rng1.NextUInt64();
Assert.NotEqual(0ul, num1);
Assert.NotEqual(num1, num2);
}
public void Construction()
{
var byteSeed = new Byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
var uintSeed = MemoryMarshal.Cast <Byte, UInt32>(byteSeed);
var seed = (uintSeed[0], uintSeed[1], uintSeed[2], uintSeed[3]);
var rng1 = XorShift.GetFactory().Create(seed);
Assert.Equal(4325440999699518727ul, rng1.NextUInt64());
var rng2 = XorShift.GetFactory().Create(rng1);
Assert.Equal(15614385950550801700ul, rng1.NextUInt64());
Assert.Equal(15614385950550801700ul, rng2.NextUInt64());
}
public void Values()
{
var byteSeed = new Byte[] { 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
var uintSeed = MemoryMarshal.Cast <Byte, UInt32>(byteSeed);
var seed = (uintSeed[0], uintSeed[1], uintSeed[2], uintSeed[3]);
var rng = XorShift.Create(seed);
var expected32 = new UInt32[]
{
2081028795, 620940381, 269070770, 16943764, 854422573, 29242889, 1550291885, 1227154591, 271695242
};
foreach (var expected in expected32)
{
Assert.Equal(expected, rng.NextUInt32());
}
var expected64 = new UInt64[]
{
9247529084182843387, 8321512596129439293, 14104136531997710878, 6848554330849612046,
343577296533772213, 17828467390962600268, 9847333257685787782, 7717352744383350108, 1133407547287910111
};
foreach (var expected in expected64)
{
Assert.Equal(expected, rng.NextUInt64());
}
var results8 = new Byte[32];
var expected8 = new Byte[]
{
102, 57, 212, 16, 233, 130, 49, 183, 158, 187, 44, 203, 63, 149, 45, 17,
117, 129, 131, 160, 70, 121, 158, 155, 224, 209, 192, 53, 10, 62, 57, 72
};
rng.Fill(results8);
Assert.Equal(expected8, results8);
}
public void NonNullable()
{
Assert.Throws <ArgumentNullException>(() => XorShift.GetFactory().CreateSeed <StepRng>(null));
}