public void TestSubractCommand()
{
var c = new SubtractCommand(options);
var actualResult = c.Execute(new long[] { 4, 1, 1 });
Assert.Equal(2, actualResult);
}
private void subButton_Click(object sender, EventArgs e)
{
expressionLbl.Text += String.IsNullOrEmpty(displayTxt.Text) ? Constants.Subtract : displayTxt.Text + Constants.Subtract;
var number = new Number
{
EnteredNumber = String.IsNullOrEmpty(displayTxt.Text) ? 0 : Convert.ToDouble(displayTxt.Text),
IsCalculated = false
};
SubtractCommand subCommand;
//Deferred execution
if (_bracketCount == 0 || _bracketCount % 2 == 0)
{
_numbers.Add(number);
subCommand = new SubtractCommand(_result, _numbers);
//Calculating
_invoker.CalculatingOperations();
}
else if (_bracketCount > 0 && _bracketCount % 2 == 0)
{
_bracketNumbers.Add(number);
subCommand = new SubtractCommand(_result, _bracketNumbers);
_invoker.CalculatingOperations();
}
else
{
_bracketNumbers.Add(number);
subCommand = new SubtractCommand(_result, _bracketNumbers);
}
//Adding current operation into sequence
_invoker.IncludeOperations(subCommand);
displayTxt.Clear();
}
public double Subtract(double first, double second)
{
var cmd = new SubtractCommand(first, second);
_subtractHandler.Handle(cmd);
return(_store.Result);
}
public SYMathCalculator(ISYReciever reciever)
{
_addCommand = new AddCommand(reciever);
_subtractCommand = new SubtractCommand(reciever);
_multiplyCommand = new MultiplyCommand(reciever);
_divCommand = new DivCommand(reciever);
_powCommand = new PowCommand(reciever);
}
public ViewModel()
{
AddCommand = new AddCommand(this);
SubtractCommand = new SubtractCommand(this);
MultiplyCommand = new MultiplyCommand(this);
DivideCommand = new DivideCommand(this);
Results = new ObservableCollection <Result>();
}
public CalculatorViewModel(ICalculatorOperationsService operationsService = null)
{
Calculator = new CalculatorModel();
_operationsService = operationsService ?? new CalculatorOperationsService();
AddCommand = new AddCommand(this);
SubtractCommand = new SubtractCommand(this);
MultiplyCommand = new MultiplyCommand(this);
DivideCommand = new DivideCommand(this);
}
private void UserControl1_Load(object sender, EventArgs e)
{
Application.AddMessageFilter(this); //Function to check the events.
calculator = new Calculator(20, 10);
addCmd = new AddCommand(calculator);
subCmd = new SubtractCommand(calculator);
mulCmd = new MultiplyCommand(calculator);
divCmd = new DividerCommand(calculator);
}
public void SubtractsNumberUsingCommandAndReturnsNegativeNumberWithPublicProperty(int number, int expected)
{
// Arrange
var subtractCommand = new SubtractCommand(number);
// Act
subtractCommand.Do();
var result = subtractCommand.Number;
// Assert
That(result, Is.EqualTo(expected));
}
static void Main(string[] args)
{
var receiver = new Calculator(345, 9945);
var addCommand = new AddCommand(receiver);
var subtractCommand = new SubtractCommand(receiver);
var multiplyCommand = new MultiplyCommand(receiver);
Console.WriteLine($"Add command result: {addCommand.Execute()}");
Console.WriteLine($"Subtract command result: {subtractCommand.Execute()}");
Console.WriteLine($"Multiply command result: {multiplyCommand.Execute()}");
Console.ReadKey();
}
public void Should_Subtract_Value()
{
CalculatorInvoker calculatorInvolker = new CalculatorInvoker();
var calculator = new Calculator(3, 4);
var command = new SubtractCommand(calculator);
var result = calculatorInvolker.ExecuteCommand(command);
result.Should().Be(-1);
}
static void Main(string[] args)
{
User user = new User();
ICommand _add1 = new AddCommand(2, 3);
user.ExecuteCommand(_add1);
ICommand _subtract1 = new SubtractCommand(3, 2);
user.ExecuteCommand(_subtract1);
user.Undo();
user.Redo();
}
public void SubtractsNumberAndUndoesOperationResultingInBaseZeroValue(int number, int expected)
{
// Arrange
var subtractCommand = new SubtractCommand(number);
subtractCommand.Do();
// Act
subtractCommand.Undo();
var result = subtractCommand.Number;
// Assert
That(result, Is.EqualTo(expected));
}
/// <summary>
/// Creates selected command instance
/// </summary>
/// <param name="operation">Operation type</param>
/// <param name="mathUnit">Math unit</param>
/// <returns>Command instance</returns>
public static Command Create(string operation, MathUnit mathUnit)
{
Command command = null;
switch (operation)
{
case "+":
command = new AdditionCommand(mathUnit);
break;
case "-":
command = new SubtractCommand(mathUnit);
break;
case "*":
command = new MultiplicationCommand(mathUnit);
break;
case "/":
command = new DivisionCommand(mathUnit);
break;
case "pow":
command = new PowCommand(mathUnit);
break;
case "extract":
command = new ExtractCommand(mathUnit);
break;
case "round":
command = new RoundCommand(mathUnit);
break;
case "exp":
command = new ExpCommand(mathUnit);
break;
case "log":
command = new LogCommand(mathUnit);
break;
}
return(command);
}
private ICommand CommandFromString(string name, string[] arguments)
{
ICommand command = null;
switch (name)
{
case "SET":
{
Register register = Registers[arguments[0]];
int value = int.Parse(arguments[1]);
command = new SetCommand(register, value);
break;
}
case "ADD":
{
Register registerOne = Registers[arguments[0]];
Register registerTwo = Registers[arguments[1]];
Register registerOut = Registers[arguments[2]];
command = new AddCommand(registerOne, registerTwo, registerOut);
break;
}
case "SUB":
{
Register registerOne = Registers[arguments[0]];
Register registerTwo = Registers[arguments[1]];
Register registerOut = Registers[arguments[2]];
command = new SubtractCommand(registerOne, registerTwo, registerOut);
break;
}
case "MUL":
{
Register registerOne = Registers[arguments[0]];
Register registerTwo = Registers[arguments[1]];
Register registerOut = Registers[arguments[2]];
command = new MultiplyCommand(registerOne, registerTwo, registerOut);
break;
}
case "DIV":
{
Register registerOne = Registers[arguments[0]];
Register registerTwo = Registers[arguments[1]];
Register registerOut = Registers[arguments[2]];
command = new DivideCommand(registerOne, registerTwo, registerOut);
break;
}
case "OUT":
{
if (Registers.ContainsKey(arguments[0]))
{
Register register = Registers[arguments[0]];
command = new OutCommand(register);
}
else
{
command = new OutCommand(arguments[0]);
}
break;
}
case "HLT":
{
command = new HaltCommand();
break;
}
case "JMP":
{
string label = arguments[0];
command = new JumpCommand(label);
break;
}
case "JIF":
{
Register registerOne = Registers[arguments[0]];
Register registerTwo = Registers[arguments[2]];
string conditionString = arguments[1];
JumpCondition jumpCondition = JumpCondition.Undefined;
switch (conditionString)
{
case "==":
jumpCondition = JumpCondition.Equal;
break;
case "<":
jumpCondition = JumpCondition.LessThan;
break;
case "<=":
jumpCondition = JumpCondition.LessThanOrEqual;
break;
case ">":
jumpCondition = JumpCondition.GreaterThan;
break;
case ">=":
jumpCondition = JumpCondition.GreaterThanOrEqual;
break;
case "!=":
jumpCondition = JumpCondition.NotEqual;
break;
}
string label = arguments[3];
command = new JumpIfCommand(registerOne, registerTwo, label, jumpCondition);
break;
}
case "CPY":
{
Register registerOne = Registers[arguments[0]];
Register registerTwo = Registers[arguments[1]];
command = new CopyCommand(registerOne, registerTwo);
break;
}
default:
if (name == "str:")
{
string stringKey = arguments[0];
string stringValue = string.Empty;
for (int i = 1; i < arguments.Length; i++)
{
stringValue += arguments[i];
if (i < arguments.Length)
{
stringValue += " ";
}
}
Program.RegisterString(stringKey, stringValue);
}
else if (name.Length > 1 && name.EndsWith(":"))
{
Program.MakeLabel(name.Substring(0, name.Length - 1));
break;
}
break;
}
return(command);
}
