// Event Handler
public static ICalculatorComponent Handler(ICalculatorComponent calculator)
{
ICalculatorComponent division = new DivisionDecorator(calculator);
calculator.Operations["division"] = division;
return(calculator);
}
public void DivisionTest()
{
//Arrange
double a = 5;
double b = 5;
double result;
//Act
ICalculatorComponent calculator = new Calculator();
ICalculatorComponent division = new DivisionDecorator(calculator);
division.CreateCalculation(calculator, a, b);
result = division.GetResult(calculator);
//Assert
Assert.AreEqual(1, result);
}
public void Decorator_DesignPatternTest()
{
//Arrange
double a = 5;
double b = 5;
double c = 144;
double d = 12;
double result1, result2, result3, result4, result5, result6;
//Act
ICalculatorComponent calculator = new Calculator();
ICalculatorComponent addition = new AdditionDecorator(calculator);
ICalculatorComponent subtraction = new SubtractionDecorator(calculator);
ICalculatorComponent multiplication = new MultiplicationDecorator(calculator);
ICalculatorComponent division = new DivisionDecorator(calculator);
ICalculatorComponent squareroot = new SquareRootDecorator(calculator);
ICalculatorComponent square = new SquareDecorator(calculator);
addition.CreateCalculation(calculator, a, b);
result1 = addition.GetResult(calculator);
subtraction.CreateCalculation(calculator, a, b);
result2 = subtraction.GetResult(calculator);
multiplication.CreateCalculation(calculator, a, b);
result3 = multiplication.GetResult(calculator);
division.CreateCalculation(calculator, a, b);
result4 = division.GetResult(calculator);
squareroot.CreateCalculation(calculator, c);
result5 = squareroot.GetResult(calculator);
square.CreateCalculation(calculator, d);
result6 = square.GetResult(calculator);
//Assert
Assert.AreEqual(10, result1);
Assert.AreEqual(0, result2);
Assert.AreEqual(25, result3);
Assert.AreEqual(1, result4);
Assert.AreEqual(12, result5);
Assert.AreEqual(144, result6);
}
