public void JumpTest(long s0, long s1, long[] signedExpected)
{
unchecked
{
var sut = new XoroShiro128PlusGenerator();
RngState128 prngState = new RngState128((ulong)s0, (ulong)s1);
ReadOnlySpan <ulong> expected = MemoryMarshal.Cast <long, ulong>(signedExpected);
Span <ulong> actual = stackalloc ulong[expected.Length];
for (int i = 0; i < actual.Length; i++)
{
prngState = XoroShiro128PlusGenerator.Jump(prngState);
prngState = sut.FillBuffer(prngState, MemoryMarshal.AsBytes(actual.Slice(i, 1)));
}
Assert.True(expected.SequenceEqual(actual));
}
}
public void Test(ulong s0, ulong s1, ulong expectedResult1, ulong expectedResult2, ulong expectedResult3)
{
// this was params ulong[], but I like InlineData too much to make that work...
Span <ulong> expectedResults = stackalloc[] { expectedResult1, expectedResult2, expectedResult3 };
var gen = new XorShift128PlusGenerator();
var state = new RngState128(s0, s1);
var buf = new byte[expectedResults.Length * 8].AsSpan();
var actualResults = MemoryMarshal.Cast <byte, ulong>(buf);
// First, do it in separate calls.
for (int i = 0; i < expectedResults.Length; ++i)
{
state = gen.FillBuffer(state, buf.Slice(i * 8, 8));
Assert.Equal(expectedResults[i], actualResults[i]);
}
// Now, do it all in one call.
state = new RngState128(s0, s1);
buf.Clear();
gen.FillBuffer(state, buf);
Assert.True(expectedResults.SequenceEqual(actualResults));
}
