public void TestComparison()
{
UnitOfMeasure newton = sys.GetUOM(Unit.NEWTON);
UnitOfMeasure metre = sys.GetUOM(Unit.METRE);
UnitOfMeasure cm = sys.GetUOM(Prefix.CENTI, metre);
double amount = 10;
Quantity qN = new Quantity(amount, newton);
Quantity qm10 = new Quantity(amount, metre);
Quantity qm1 = new Quantity(1, metre);
Quantity qcm = new Quantity(amount, cm);
Assert.IsTrue(qN.Compare(qN) == 0);
Assert.IsTrue(qm10.Compare(qm1) == 1);
Assert.IsTrue(qm1.Compare(qm10) == -1);
Assert.IsTrue(qcm.Compare(qm1) == -1);
Assert.IsTrue(qm1.Compare(qcm) == 1);
try
{
qN.Compare(qm10);
Assert.Fail("not comparable)");
}
catch (Exception)
{
}
Quantity conc = new Quantity(0.0025, sys.GetUOM(Unit.MOLARITY));
double pH = -Math.Log10(conc.Amount);
Assert.IsTrue(IsCloseTo(pH, 2.60, DELTA2));
}