public void TestRoundToTickNotAtMidPoint(MidpointRoundingMode mode)
{
const int range = 6;
var epsilon = new BigRational(1, 12);
var tick = new BigRational(1, 3);
var max = range * tick;
var min = -range * tick;
for (BigRational rational = min; rational <= max; rational += tick)
{
AssertEqual(rational, BigRational.RoundToTick(rational + epsilon, tick, mode));
AssertEqual(rational, BigRational.RoundToTick(rational - epsilon, tick, mode));
AssertEqual(rational, BigRational.RoundToTick(rational, tick, mode));
}
}
public void RoundToTickWithTickError()
{
Assert.Throws <ArgumentException>(() => BigRational.RoundToTick(1, new BigRational(-1, 2), default));
}
public void TestRoundToTickAtMidPoint(string unrounded, string tick, MidpointRoundingMode mode, string expected)
{
AssertEqual(
BigRational.RoundToTick(BigRational.Parse(unrounded), BigRational.Parse(tick), mode),
BigRational.Parse(expected));
}
public void RoundToTickWithModeError()
{
Assert.Throws <ArgumentException>(() =>
BigRational.RoundToTick(1, new BigRational(1, 2), (MidpointRoundingMode)100));
}
