public void ExecuteForCommand()
{
ICommand setX = new SetVariableCommand("x", new ConstantExpression(0));
ICommand setY = new SetVariableCommand("y", new ConstantExpression(0));
List<ICommand> commands = new List<ICommand>();
commands.Add(setX);
commands.Add(setY);
ICommand initialCommand = new CompositeCommand(commands);
IExpression condition = new CompareExpression(ComparisonOperator.Less, new VariableExpression("x"), new ConstantExpression(6));
IExpression addXtoY = new ArithmeticBinaryExpression(ArithmeticOperator.Add, new VariableExpression("y"), new VariableExpression("x"));
ICommand addToY = new SetVariableCommand("y", addXtoY);
ICommand endCommand = new SetVariableCommand("x", new ArithmeticBinaryExpression(ArithmeticOperator.Add, new VariableExpression("x"), new ConstantExpression(1)));
ForCommand forcmd = new ForCommand(initialCommand, condition, endCommand, addToY);
Context context = new Context();
context.SetValue("y", null);
forcmd.Execute(context);
Assert.AreEqual(15, context.GetValue("y"));
}
public void ExecuteForEachCommand()
{
IExpression addToX = new ArithmeticBinaryExpression(ArithmeticOperator.Add, new VariableExpression("b"), new VariableExpression("a"));
ICommand setX = new SetVariableCommand("a", addToX);
IExpression values = new ConstantExpression(new int [] { 1, 2, 3 } );
ForEachCommand foreachcmd = new ForEachCommand("b", values, setX);
Context context = new Context();
context.SetValue("a", 0);
foreachcmd.Execute(context);
Assert.AreEqual(6, context.GetValue("a"));
}
public void ExecuteCompositeCommand()
{
Context context = new Context();
SetVariableCommand command1 = new SetVariableCommand("a", new ConstantExpression("bar"));
SetVariableCommand command2 = new SetVariableCommand("b", new ConstantExpression(1));
SetVariableCommand command3 = new SetVariableCommand("c", new VariableExpression("a"));
List<ICommand> commands = new List<ICommand>();
commands.Add(command1);
commands.Add(command2);
commands.Add(command3);
CompositeCommand command = new CompositeCommand(commands);
command.Execute(context);
Assert.AreEqual("bar", context.GetValue("a"));
Assert.AreEqual(1, context.GetValue("b"));
Assert.AreEqual("bar", context.GetValue("c"));
}
public void ExecuteWhileCommand()
{
IExpression incrementX = new ArithmeticBinaryExpression(ArithmeticOperator.Add, new ConstantExpression(1), new VariableExpression("a"));
IExpression decrementY = new ArithmeticBinaryExpression(ArithmeticOperator.Subtract, new VariableExpression("b"), new ConstantExpression(1));
ICommand setX = new SetVariableCommand("a", incrementX);
ICommand setY = new SetVariableCommand("b", decrementY);
List<ICommand> commands = new List<ICommand>();
commands.Add(setX);
commands.Add(setY);
ICommand command = new CompositeCommand(commands);
IExpression yexpr = new VariableExpression("b");
WhileCommand whilecmd = new WhileCommand(yexpr, command);
Context context = new Context();
context.SetValue("a", 0);
context.SetValue("b", 5);
whilecmd.Execute(context);
Assert.AreEqual(0, context.GetValue("b"));
Assert.AreEqual(5, context.GetValue("a"));
}
public void ExecuteSetLocalVariableCommandWithVariable()
{
Context context = new Context();
SetVariableCommand command = new SetVariableCommand("a", new ConstantExpression("bar"));
command.Execute(context);
Assert.AreEqual("bar", context.GetValue("a"));
}
public void ExecuteIfCommandWhenTrue()
{
IExpression condition = new ConstantExpression(true);
ICommand setCommand = new SetVariableCommand("a", new ConstantExpression(1));
IfCommand command = new IfCommand(condition, setCommand);
Context context = new Context();
command.Execute(context);
Assert.AreEqual(1, context.GetValue("a"));
}
public void ExecuteIfCommandElseWhenFalse()
{
IExpression condition = new ConstantExpression(false);
ICommand setXCommand = new SetVariableCommand("a", new ConstantExpression(1));
ICommand setYCommand = new SetVariableCommand("b", new ConstantExpression(2));
IfCommand command = new IfCommand(condition, setXCommand, setYCommand);
Context context = new Context();
command.Execute(context);
Assert.AreEqual(Undefined.Instance, context.GetValue("a"));
Assert.AreEqual(2, context.GetValue("b"));
}