public void ToDouble_IsCalled_ADoubleTypeShouldBeReturned()
{
//Arrange
var unit = new AreaUnit(10, Areas.Cm2);
Type expectedType = typeof(double);
//Act
double toDouble = unit.ToDouble(Areas.M2);
//Assert
Assert.IsInstanceOfType(toDouble, expectedType);
}
public void CastToDouble_Returns_DoubleOfCurrentUserUnitValue()
{
//Arrange
var unit = new AreaUnit(10, Areas.In2);
const double expectedValue = 10;
//Act
double actualDouble = Convert.ToDouble(unit);
//Assert
Assert.AreEqual(expectedValue, actualDouble);
}
public void Unit_MultipliedByAnotherUnit_EqualsAreaMultiplied()
{
//Arrange
var unit1 = new AreaUnit(30, Areas.In2);
var unit2 = new AreaUnit(10, Areas.In2);
const double expectedValue = 300;
//Act
double actualValue = (unit1 * unit2).SystemValue;
//Assert
Assert.AreEqual(expectedValue, actualValue);
}
public void Unit_DividedFromAnotherArea_EqualsTheDividedValue()
{
//Arrange
var unit1 = new AreaUnit(30, Areas.In2);
var unit2 = new AreaUnit(2, Areas.In2);
const double expectedValue = 15;
//Act
double actualValue = (unit1 / unit2).SystemValue;
//Assert
Assert.AreEqual(expectedValue, actualValue);
}
public void Unit_AddedToAnotherUnit_EqualsTheSumOfAreas()
{
//Arrange
var unit1 = new AreaUnit(10, Areas.In2);
var unit2 = new AreaUnit(10, Areas.In2);
const double expectedValue = 20;
//Act
double actualValue = (unit1 + unit2).SystemValue;
//Assert
Assert.AreEqual(expectedValue, actualValue);
}
public void Unit_SubtractedFromAnotherUnit_EqualsTheDifferenceOfAreas()
{
//Arrange
var unit1 = new AreaUnit(30, Areas.In2);
var unit2 = new AreaUnit(10, Areas.In2);
const double expectedValue = 20;
//Act
double actualValue = (unit1 - unit2).SystemValue;
//Assert
Assert.AreEqual(expectedValue, actualValue);
}
public void Unit_ToStringIsCalled_UnitValuesAndItsSymbolReturnedAsAString()
{
//Arrange
var unit = new AreaUnit(5, Areas.In2);
const string expectedValue = "5.0 in²";
//Act
string actualValue = unit.ToString();
//Assert
Assert.AreEqual(expectedValue, actualValue);
}