public void TestStringUtils()
{
Assert.AreEqual(11, StringUtils.HexCharToInteger('B'));
var cbuf = new char[128];
var testNumbers = new ulong[]
{
0, 1, 2, 100, 1000, 10000, 100000, 10000000,
(ulong)PRNG.Next(0, 10000),
(ulong)PRNG.Next(0, 10000),
(ulong)PRNG.Next(0, 10000),
(ulong)PRNG.Next(0, 10000),
(ulong)PRNG.Next(0, 10000),
(ulong)PRNG.Next(0, 10000),
(ulong)PRNG.Next(0, 10000)
};
foreach (var val in testNumbers)
{
var sans = val.ToString("X");
var str = (PRNG.NextBool() ? "0x" : "") + sans;
Assert.AreEqual(val, StringUtils.FromHex(str));
var utfBytes = Encoding.UTF8.GetBytes(str);
Assert.AreEqual(val, StringUtils.FromUTF8Hex(utfBytes));
var cnt = StringUtils.ToHex(val, cbuf);
Assert.AreEqual(sans.Length, cnt);
Assert.IsTrue(sans.AsSpan().SequenceEqual(cbuf.AsSpan(0, cnt)));
}
var arr = new byte[64];
PRNG.NextBytes(arr);
var facit = BitConverter.ToString(arr).Replace("-", "");
var my = StringUtils.ToHex(arr);
Assert.AreEqual(facit, my);
var dvalstr = "0.00000000000123";
var dval = double.Parse(dvalstr, System.Globalization.CultureInfo.InvariantCulture);
var lots = StringUtils.DoubleToString(dval);
// this is "1.23E-12"
var defaultToString = dval.ToString(System.Globalization.CultureInfo.InvariantCulture);
Assert.AreEqual(dvalstr, StringUtils.DoubleToString(dval));
}
/// <summary>
/// Generates a single random leaf of X.690 node tree.
/// </summary>
/// <param name="lengthEncoding">Definite, indefinite or random.</param>
/// <returns>A tree leaf.</returns>
static X690.Node RandomLeaf(LengthEncoding lengthEncoding = LengthEncoding.Definite)
{
switch (PRNG.Next(0, 4))
{
case 0: return(new X690.Null());
case 1: return(new X690.Boolean(PRNG.NextBool()));
case 2: return(new X690.Integer(PRNG.Next(int.MinValue, int.MaxValue)));
case 3: return(new X690.Text(RandomString())
{
IsDefiniteLength = lengthEncoding.IsDefiniteLength()
});
}
throw new InvalidOperationException();
}
private void TestBoolMatrix(int size)
{
var mat = new SymmetricMatrixBool(size);
// fill
for (int x = 0; x < size; x++)
{
for (int y = 0; y < size; y++)
{
mat[x, y] = PRNG.NextBool();
}
}
// check
for (int x = 0; x < size; x++)
{
for (int y = 0; y < size; y++)
{
Assert.AreEqual(mat[x, y], mat[y, x]);
}
}
}
public void TestDataWriter2()
{
ulong ss = RandomSeed.GetUInt64();
byte[] small = new byte[64];
using (var wrt = new DataWriter(1))
{
for (int runs = 0; runs < 10000; runs++)
{
wrt.Clear();
var originalSeed = PRNG.NextUInt64(ref ss);
var seed = originalSeed;
{
int numOps = PRNG.Next(ref seed, 1, 15);
for (int o = 0; o < numOps; o++)
{
switch (PRNG.Next(ref seed, 0, 6))
{
case 0:
wrt.WriteBool(PRNG.NextBool(ref seed));
break;
case 1:
wrt.WriteSingle((float)PRNG.Next(ref seed, 1, 100));
break;
case 2:
wrt.WriteVariableInt32(PRNG.Next(ref seed, -50, 50));
break;
case 3:
wrt.WriteString(PRNG.NextUInt32(ref seed).ToString());
break;
case 4:
wrt.WriteUInt16((ushort)PRNG.Next(ref seed, 0, ushort.MaxValue));
break;
case 5:
var sss = small.AsSpan(0, PRNG.Next(ref seed, 1, 25));
wrt.WriteBytes(sss);
break;
}
}
}
// read
var rdr = wrt.ReadOnlySpan;
seed = originalSeed;
{
int numOps = PRNG.Next(ref seed, 1, 15);
for (int o = 0; o < numOps; o++)
{
switch (PRNG.Next(ref seed, 0, 6))
{
case 0:
{
var facit = PRNG.NextBool(ref seed);
Assert.AreEqual(facit, rdr.ReadBool());
}
break;
case 1:
{
var facit = (float)PRNG.Next(ref seed, 1, 100);
Assert.AreEqual(facit, rdr.ReadSingle());
}
break;
case 2:
{
var facit = PRNG.Next(ref seed, -50, 50);
Assert.AreEqual(facit, rdr.ReadVariableInt32());
}
break;
case 3:
{
var facit = PRNG.NextUInt32(ref seed).ToString();
Assert.AreEqual(facit, rdr.ReadString());
}
break;
case 4:
{
var facit = (ushort)PRNG.Next(ref seed, 0, ushort.MaxValue);
Assert.AreEqual(facit, rdr.ReadUInt16());
}
break;
case 5:
{
var sss = small.AsSpan(0, PRNG.Next(ref seed, 1, 25));
var aaa = rdr.ReadBytes(sss.Length);
Assert.IsTrue(sss.SequenceEqual(aaa));
}
break;
}
}
}
}
}
}
public void TestPRNG()
{
const int iterations = 10000000;
Console.WriteLine();
int trues = 0;
int larger = 0;
int smaller = 0;
for (int i = 0; i < iterations; i++)
{
if (PRNG.NextBool())
{
trues++;
}
int val = PRNG.Next(5, 8); // 5, 6 or 7
switch (val)
{
case 5:
smaller++;
break;
case 6:
break;
case 7:
larger++;
break;
default:
Assert.Fail("Value " + val + " isn't 5, 6 or 7");
break;
}
// ranged
var r1 = (int)PRNG.NextUInt32();
var r2 = (int)PRNG.NextUInt32();
if (r1 < r2)
{
var rr = PRNG.Next(r1, r2);
Assert.IsTrue(rr >= r1 && rr < r2, rr.ToString() + " is not between " + r1 + " and " + r2);
}
else if (r1 > r2)
{
var rr = PRNG.Next(r2, r1);
Assert.IsTrue(rr >= r2 && rr < r1, rr.ToString() + " is not between " + r2 + " and " + r1);
}
}
var p = (double)trues / (double)iterations;
Assert.IsTrue(p > 0.495 && p < 0.505);
const double third = 1.0 / 3.0;
const double offset = third * 0.05;
const double low = third - offset;
const double high = third + offset;
p = (double)smaller / (double)iterations;
Assert.IsTrue(p > low && p < high);
p = (double)larger / (double)iterations;
Assert.IsTrue(p > low && p < high);
}
public void TestPRNG()
{
const int iterations = 5000000;
Console.WriteLine();
int trues = 0;
int larger = 0;
int smaller = 0;
for (int i = 0; i < iterations; i++)
{
if (PRNG.NextBool())
{
trues++;
}
int val = PRNG.Next(5, 8); // 5, 6 or 7
switch (val)
{
case 5:
smaller++;
break;
case 6:
break;
case 7:
larger++;
break;
default:
Assert.Fail("Value " + val + " isn't 5, 6 or 7");
break;
}
// ranged
var r1 = (int)PRNG.NextUInt32();
var r2 = (int)PRNG.NextUInt32();
if (r1 < r2)
{
var rr = PRNG.Next(r1, r2);
Assert.IsTrue(rr >= r1 && rr < r2, rr.ToString() + " is not between " + r1 + " and " + r2);
}
else if (r1 > r2)
{
var rr = PRNG.Next(r2, r1);
Assert.IsTrue(rr >= r2 && rr < r1, rr.ToString() + " is not between " + r2 + " and " + r1);
}
}
var p = (double)trues / (double)iterations;
Assert.IsTrue(p > 0.495 && p < 0.505);
const double third = 1.0 / 3.0;
const double offset = third * 0.05;
const double low = third - offset;
const double high = third + offset;
p = (double)smaller / (double)iterations;
Assert.IsTrue(p > low && p < high);
p = (double)larger / (double)iterations;
Assert.IsTrue(p > low && p < high);
// make sure nextdouble() and nextfloat() don't generate numbers outside range
var state = RandomSeed.GetUInt64();
for (int r = 0; r < 10000000; r++)
{
double d = PRNG.NextDouble(ref state);
Assert.IsTrue(d >= 0.0 && d < 1.0);
float f = PRNG.NextFloat(ref state);
Assert.IsTrue(f >= 0.0f && f < 1.0f);
}
}
/// <summary>
/// Generates a single branch of X.690 node tree.
/// </summary>
/// <param name="lengthEncoding">Definite, indefinite or random.</param>
/// <returns>A tree branch.</returns>
static X690.Node RandomBranch(LengthEncoding lengthEncoding = LengthEncoding.Definite) => PRNG.NextBool()
? new X690.Sequence()
{
IsDefiniteLength = lengthEncoding.IsDefiniteLength()
} as X690.Node
: new X690.Set()
{
IsDefiniteLength = lengthEncoding.IsDefiniteLength()
} as X690.Node;
