public void CreateBooleanAnd()
{
Expression expression = factory.CreateExpression(
factory.CreateComparationEqual(factory.CreateFieldNode("FIELD"),
factory.CreateValueNode("VALUE", ValueNodeType.Text)));
BooleanAnd and = factory.CreateBooleanAnd(expression, expression);
Assert.IsNotNull(and);
Assert.IsInstanceOfType(typeof(BooleanAnd), and);
Assert.IsInstanceOfType(typeof(Expression), and.LeftNode);
Assert.IsInstanceOfType(typeof(Expression), and.RightNode);
}
/// <summary>
/// BOOLEAN expression Rule
/// | '(' BooleanRule ')'
/// | OperationRule
/// <returns></returns>
private Expression BooleanRule()
{
_token = _scanner.GetToken();
switch (_token.Ttype)
{
case TokenType.LEFT_PARENTHESIS:
_parenthesisDepth++;
return(BooleanOperatorRule());
case TokenType.FIELD:
FieldNode fieldNode = _astFactory.CreateFieldNode(_token.Value);
return(_astFactory.CreateExpression(ComparationRule(fieldNode)));
default:
throw new ParserException("Field expected.");
}
}