public override TestResult Run()
{
ulong n = 999;
Stopwatch sw = new Stopwatch();
TestResult tr = new TestResult();
for (int i = 0; i < 10; i++)
{
sw.Restart();
byte[] nByte = BigInt.MakeByteArray(n);
sw.Stop();
long t = sw.ElapsedTicks;
tr.AddSegment("Make byte array", t);
Console.WriteLine(tr.SegmentString());
sw.Restart();
byte[] result = BigInt.Factorial(nByte);
sw.Stop();
t = sw.ElapsedTicks;
tr.AddSegment("Factorial", t);
Console.WriteLine(tr.SegmentString());
}
return(tr);
}
public void FactorialTest()
{
TestCase1[] factorial_data = new TestCase1[Math2.FactorialTable.Length];
// step 1: compute factorials using big integer to avoid trunctaion errors
factorial_data[0] = new TestCase1(0, 1);
for (int i = 1; i < Math2.FactorialTable.Length; i++)
{
factorial_data[i] = new TestCase1(i, BigInt.Factorial(i));
}
// Run the test case
TestCaseSet <int>[] testCases =
{
new TestCaseSet <int>(factorial_data, "Factorial: Complete table", 1),
};
NumericFunctionTest.RunSet(Math2.Factorial, "Factorial", testCases);
Assert.AreEqual(double.PositiveInfinity, Math2.Factorial(Math2.FactorialTable.Length));
Assert.AreEqual(double.PositiveInfinity, Math2.Factorial(int.MaxValue));
// TODO: negative
}
void TestFactorial(ulong n)
{
byte[] nByte = BigInt.MakeByteArray(n);
byte[] result = BigInt.Factorial(nByte);
string r = ClearZeroes(result);
BigInteger result2 = NumericsFactorial(n);
Assert.AreEqual(r, result2.ToString());
}
public void FactorialTableTest()
{
TestCase1[] factorial_data = new TestCase1[Math2.FactorialTable.Length];
// step 1: compute factorials using big integer to avoid trunctaion errors
factorial_data[0] = new TestCase1(0, 1);
for (int i = 1; i < Math2.FactorialTable.Length; i++)
{
factorial_data[i] = new TestCase1(i, BigInt.Factorial(i));
}
// Run the test case
TestCaseSet <int>[] testCases =
{
new TestCaseSet <int>(factorial_data, "Factorial: Complete table", 1),
};
NumericFunctionTest.RunSet((int i) => Math2.FactorialTable[i], "Factorial Table", testCases);
}