public void Bytes()
{
var rng = new StepRng(0);
Random random = RandomShim.Create(rng);
var buffer = new Byte[1024];
random.NextBytes(buffer);
var ints = MemoryMarshal.Cast <Byte, UInt64>(buffer);
for (Int32 i = 0; i < ints.Length; i++)
{
Assert.Equal((UInt64)i, ints[i]);
}
#if !NET472
random.NextBytes(buffer.AsSpan());
for (Int32 i = 0; i < ints.Length; i++)
{
Assert.Equal((UInt64)(i + ints.Length), ints[i]);
}
#endif
var maxRng = new StepRng(UInt64.MaxValue)
{
Increment = 0
};
var maxShim = RandomNumberGeneratorShim.Create(maxRng);
buffer = new Byte[1024];
maxShim.GetBytes(buffer, 200, 500);
Assert.All(buffer.Take(200), b => Assert.Equal(0, b));
Assert.All(buffer.Skip(200).Take(500), b => Assert.Equal(Byte.MaxValue, b));
Assert.All(buffer.Skip(700), b => Assert.Equal(0, b));
}
public void Disposal()
{
var rng = new DisposableRng();
var shim = RandomNumberGeneratorShim.Create(rng);
shim.Dispose();
Assert.True(rng.Disposed);
}
public void NonNullable()
{
Assert.Throws <ArgumentNullException>(() => RandomNumberGeneratorShim.Create <StepRng>(null !));
var rng = RandomNumberGeneratorShim.Create(new StepRng(0));
Assert.Throws <ArgumentNullException>(() => rng.GetBytes(null !));
Assert.Throws <ArgumentNullException>(() => rng.GetNonZeroBytes(null !));
}
public void BadArgs()
{
var rng = new StepRng(0);
var shim = RandomNumberGeneratorShim.Create(rng);
var bytes = new Byte[32];
Assert.Throws <ArgumentNullException>(() => shim.GetBytes(null !, 0, 10));
Assert.Throws <ArgumentOutOfRangeException>(() => shim.GetBytes(bytes, -10, 10));
Assert.Throws <ArgumentOutOfRangeException>(() => shim.GetBytes(bytes, 10, -10));
Assert.Throws <ArgumentException>(() => shim.GetBytes(bytes, 32, 1));
}
public void NonZeroBytes()
{
var rng = new SequenceRng(new UInt32[] { 0, 1, 2, 0, 1, 2, 0, 1 });
var shim = RandomNumberGeneratorShim.Create(rng);
var buffer = new Byte[35];
shim.GetNonZeroBytes(buffer);
Assert.DoesNotContain((Byte)0, buffer);
#if !NET472
shim.GetNonZeroBytes(buffer.AsSpan());
Assert.DoesNotContain((Byte)0, buffer);
#endif
}
