public void CalculatesFloorRemCorrectly(ulong divisor, ulong testDividend)
{
var uInt64Divisor = new UInt64Divisor(divisor);
var remainder = uInt64Divisor.FloorRem(testDividend, out var rounded);
Assert.Multiple(() =>
{
Assert.AreEqual(testDividend % divisor, remainder, SerializeDivisor(uInt64Divisor));
Assert.AreEqual(testDividend / divisor * divisor, rounded, SerializeDivisor(uInt64Divisor));
});
}
public void CalculatesFloorRemCorrectlyRandomNumerators(ulong divisor)
{
var uInt64Divisor = new UInt64Divisor(divisor);
var rng = new PcgRandom();
for (ulong i = 0; i < RandomTestCount; i++)
{
var testDividend = rng.Next() | ((ulong)rng.Next() << 32);
var remainder = uInt64Divisor.FloorRem(testDividend, out var rounded);
Assert.AreEqual(testDividend % divisor, remainder, $"Trying to test {testDividend} % {SerializeDivisor(uInt64Divisor)}");
Assert.AreEqual(testDividend / divisor * divisor, rounded, $"Trying to test {testDividend} / {SerializeDivisor(uInt64Divisor)} * {SerializeDivisor(uInt64Divisor)}");
}
}