public void BadIndexes()
{
var rngCore = new StepBlockRng {
BlockCounter = UInt32.MaxValue - 1
};
BlockBuffer32 <StepBlockRng> blockBuffer = new(rngCore);
Assert.Throws <ArgumentOutOfRangeException>(() => blockBuffer.GenerateAndSet(-1));
Assert.Throws <ArgumentOutOfRangeException>(() => blockBuffer.GenerateAndSet(20));
}
public void UInt64SpansBlock()
{
var rngCore = new StepBlockRng();
BlockBuffer32 <StepBlockRng, UInt32> blockBuffer = new(rngCore);
for (Int32 i = 0; i < 7; i++)
{
Assert.Equal(1u, blockBuffer.NextUInt32());
}
var spanned = blockBuffer.NextUInt64();
Assert.Equal(1u, spanned & 0xFFFFFFFF);
Assert.Equal(2u, spanned >> 32);
}
public void UInt64WrapAround()
{
var rngCore = new StepBlockRng {
BlockCounter = UInt32.MaxValue - 1
};
BlockBuffer32 <StepBlockRng> blockBuffer = new(rngCore);
for (Int32 i = 0; i < 4; i++)
{
Assert.Equal(UInt64.MaxValue, blockBuffer.NextUInt64());
}
for (Int32 i = 0; i < 4; i++)
{
Assert.Equal(0u, blockBuffer.NextUInt64());
}
}
public void SetCounter()
{
var rngCore = new StepBlockRng {
BlockCounter = UInt32.MaxValue - 1
};
BlockBuffer32 <StepBlockRng, UInt32> blockBuffer = new(rngCore) { BlockCounter = 9u, Index = 0 };
blockBuffer.BlockCounter = 9u;
for (Int32 i = 0; i < 8; i++)
{
Assert.Equal(9u, blockBuffer.NextUInt32());
}
for (Int32 i = 0; i < 8; i++)
{
Assert.Equal(10u, blockBuffer.NextUInt32());
}
Assert.Equal(10u, blockBuffer.BlockCounter);
}
public void Fill()
{
var rngCore = new StepBlockRng {
BlockCounter = UInt32.MaxValue - 1
};
BlockBuffer32 <StepBlockRng> blockBuffer = new(rngCore);
var dest = new UInt32[17];
blockBuffer.Fill(MemoryMarshal.Cast <UInt32, Byte>(dest));
for (UInt32 i = 0; i < rngCore.BlockLength; i++)
{
Assert.Equal(UInt32.MaxValue, dest[i]);
}
for (UInt32 i = (UInt32)rngCore.BlockLength; i < rngCore.BlockLength * 2; i++)
{
Assert.Equal(0u, dest[i]);
}
Assert.Equal(1u, dest[16]);
}
