public void CreateUnaryExpression()
{
IExpression valueExpression = new ConstantExpression(1);
UnaryExpression expression = new ArithmeticUnaryExpression(ArithmeticOperator.Minus, valueExpression);
Assert.IsTrue(expression.Expression == valueExpression);
}
public void CreateBinaryExpression()
{
IExpression leftExpression = new ConstantExpression(1);
IExpression rightExpression = new ConstantExpression(2);
BinaryExpression expression = new ArithmeticBinaryExpression(ArithmeticOperator.Add, leftExpression, rightExpression);
Assert.IsTrue(expression.LeftExpression == leftExpression);
Assert.IsTrue(expression.RightExpression == rightExpression);
}
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 EvaluateStringConstantExpression()
{
ConstantExpression expression = new ConstantExpression("One");
Assert.AreEqual("One", expression.Evaluate(null));
}
public void CreateIntegerConstantExpression()
{
ConstantExpression expression = new ConstantExpression(1);
Assert.AreEqual(1, expression.Value);
}
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"));
}