Navigation Sequences: Basic Syntax¶

The fundamental concept of NSEQL is navigation sequence. A navigation sequence is comprised of a list of commands that are executed sequentially on the interface of an Internet browser.

The basic syntax for specifying a navigation sequence is as follows:

command-1;command-2;…;command-n;

Each command has a name and can receive a list of parameters. The format of each command is as follows:

NAME( param1, param2, …, paramN)

The alternative syntax is also allowed:

NAME, param1, param2, …, paramN

This alternative syntax is discouraged for general use because is less clear than the parenthesis notation.

NSEQL syntax has the following special characters: ‘(’, ‘)’, ‘,’ and ‘;’.Ifa string parameter contains any of these characters,they have to be escaped using a backslash (‘\’). Thebackslash itself can also be escaped, i.e.:“string with \ symbol as part of content \” should be written as “string with \\ symbol as part of content \\”.

In addition, when an interpolation is performed, ‘{’, ‘}’, ‘(’, ‘)’, ‘,’, ‘^’ and ‘@’ have a special meaning. Ifthey are used without that meaning (i.e. to use them as part of an attribute name, or so that ‘@’ does not refer to a variable), they must be escapedwithabackslash (‘\’).

Following, there are someexamples of how to escapethese special characters:

• @ => \@

• ^ => \^

• { => \{

• } => \}

• ( => \\(

• ) => \\)

• \ => \\\\

• , => \\,

• ; => \\;

Some commands can receive optional parameters. These parameters can be of two types: those that have to be present, but can take “_NULL_” in case of not wanting to specify a value for the parameter (e.g., the parameter “name” in the commands SetInputValue, SetTextAreaValue, SelectIndexByText, SelectIndexByPosition, SelectIndexByValue and ClickOnElement), and those where the parameter can be omitted (for example the “timeout” parameter of the FindElementByXXX commands).

The input parameters cannot be neither preceded nor followed by blanks.

Some commands accept text as input parameters that represent search strings; these can be compared in equality or containment operations. In those cases, NSEQL allows the use of not only literals, but also regular expressions. Their use makes NSEQL look for page patterns that match the Java regular expressions.