public void GivenBaseNumberWhenSubtractDoubleShouldReturnNewBaseNumberWithDoubleSubtractedFromSource()
{
var uom = _mileUnitOfMeasure;
var number = new NumericValue(uom.ToModelUom(), 3.62);
var result = number.Subtract(1.23);
Assert.AreEqual(2.39, result.Value, Epsilon);
}
public void GivenBaseNumbersWithIncompatibleUnitsWhenSubtractThenException()
{
var originalUom = InternalUnitSystemManager.Instance.UnitOfMeasures["m"];
var originalNumber = new NumericValue(originalUom.ToModelUom(), 1.75);
var secondUom = InternalUnitSystemManager.Instance.UnitOfMeasures["C"];
var secondNumber = new NumericValue(secondUom.ToModelUom(), 3.5);
Assert.Throws <InvalidOperationException>(() => originalNumber.Subtract(secondNumber));
}
public void GivenTwoBaseNumbersWithSameUomWhenSubtractedReturnNewBaseNumberWithDifferenceAsSourceValue()
{
var uom = InternalUnitSystemManager.Instance.UnitOfMeasures["C"];
var originalNumber = new NumericValue(uom.ToModelUom(), 22);
var secondNumber = new NumericValue(uom.ToModelUom(), 13);
var result = originalNumber.Subtract(secondNumber);
Assert.AreEqual(9, result.Value);
}
public void GivenBaseNumberWhenSubtractBaseNumberThenResultIsInOriginalUom()
{
var originalUom = InternalUnitSystemManager.Instance.UnitOfMeasures["m"];
var originalNumber = new NumericValue(originalUom.ToModelUom(), 1.75);
var secondUom = InternalUnitSystemManager.Instance.UnitOfMeasures["ft"];
var secondNumber = new NumericValue(secondUom.ToModelUom(), 3.5);
var expected = 0.6832; //1.75m - (3.5ft -> m)
var actual = originalNumber.Subtract(secondNumber);
Assert.AreEqual(expected, actual.Value, Epsilon);
}