public void Next()
{
var rng = new StepRng(0);
Random random = RandomShim.Create(rng);
for (Int32 i = 0; i < 100; i++)
{
Assert.Equal(i, random.Next());
}
for (Int32 i = 0; i < 100; i++)
{
Assert.Equal(i, random.Next(100));
}
for (Int32 i = 0; i < 100; i++)
{
Assert.Equal(i, random.Next(0, 100));
}
for (Int32 i = 0; i < 10_000; i++)
{
var value = random.NextDouble();
Assert.True(0 <= value && value < 1);
}
}
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 NonNullable()
{
Assert.Throws <ArgumentNullException>(() => RandomShim.Create <StepRng>(null !));
var rng = RandomShim.Create(new StepRng(0));
Assert.Throws <ArgumentNullException>(() => rng.NextBytes(null !));
}
