/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main()
{
Variable v = new Variable("machine");
Command c = new ForCommand(ExampleMachine.Dublin(), v, new PrintCommand(v));
c.Execute();
}
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"));
}
/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main()
{
MachineComposite dublin = ExampleMachine.Dublin();
Variable v = new Variable("machine");
Command c = new ForCommand(dublin, v, new ShutDownCommand(v));
c.Execute();
}
public void ExecuteSimpleForOnEmptyList()
{
ICommand body = new SetCommand("b", new BinaryOperatorExpression(new NameExpression("a"), new NameExpression("b"), BinaryOperator.Add));
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("b", 0);
ForCommand command = new ForCommand("a", new ConstantExpression(new object[] { }), body);
command.Execute(environment);
Assert.AreEqual(0, environment.GetValue("b"));
}
public void ExecuteForCommand()
{
IExpression fromexpr = new ConstantExpression(1);
IExpression toexpr = new ConstantExpression(4);
ICommand body = new ExpressionCommand(new AssignExpression("a", new BinaryOperatorExpression(BinaryOperator.Multiply, new NameExpression("a"), new NameExpression("k"))));
ForCommand fcmd = new ForCommand("k", fromexpr, toexpr, body);
Context context = new Context();
context.SetValue("a", 1);
fcmd.Execute(context);
Assert.AreEqual(24, context.GetValue("a"));
}
public void ExecuteSimpleForWithContinue()
{
ICommand ifcmd = new IfCommand(new CompareExpression(ComparisonOperator.Equal, new NameExpression("a"), new ConstantExpression(2)), new ContinueCommand());
ICommand setcmd = new SetCommand("b", new BinaryOperatorExpression(new NameExpression("a"), new NameExpression("b"), BinaryOperator.Add));
ICommand body = new CompositeCommand(new ICommand[] { ifcmd, setcmd });
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("b", 0);
ForCommand command = new ForCommand("a", new ConstantExpression(new object[] { 1, 2, 3 }), body);
command.Execute(environment);
Assert.AreEqual(4, environment.GetValue("b"));
}
public void ForWithAddExpression()
{
var command = new SetVariableCommand("a", new ArithmeticBinaryExpression(ArithmeticOperator.Add, new VariableExpression("k"), new VariableExpression("a")));
var forcommand = new ForCommand("k", new ConstantExpression(new int[] { 1, 2, 3, 4 }), command);
Context context = new Context();
var result = forcommand.Execute(context);
Assert.IsNull(result);
Assert.AreEqual("k", forcommand.VariableName);
Assert.IsNotNull(forcommand.Expression);
Assert.IsNotNull(forcommand.Command);
Assert.AreEqual(4, context.GetValue("k"));
Assert.AreEqual(10, context.GetValue("a"));
}
public void CreateAndExecuteForCommand()
{
var command = new SetVariableCommand("a", new VariableExpression("k"));
var forcommand = new ForCommand("k", new ConstantExpression((new int[] { 1, 2, 3 })), command);
Context context = new Context();
context.SetValue("a", 0);
var result = forcommand.Execute(context);
Assert.IsNull(result);
Assert.AreEqual("k", forcommand.VariableName);
Assert.IsNotNull(forcommand.Expression);
Assert.IsNotNull(forcommand.Command);
Assert.AreEqual(3, context.GetValue("k"));
Assert.AreEqual(3, context.GetValue("a"));
}
public void RaiseWhenForOverAnInteger()
{
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("b", 0);
ForCommand command = new ForCommand("a", new ConstantExpression(1), null);
try
{
command.Execute(environment);
Assert.Fail("Exception expected");
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(TypeError));
Assert.AreEqual("'int' object is not iterable", ex.Message);
}
}
