public void ParseReturnCommandWithExpression()
{
ICommand command = ParseCommand("return 1;");
Assert.IsNotNull(command);
Assert.IsInstanceOfType(command, typeof(ReturnCommand));
ReturnCommand retcmd = (ReturnCommand)command;
Assert.IsNotNull(retcmd.Expression);
Assert.IsInstanceOfType(retcmd.Expression, typeof(ConstantExpression));
}