webdriverjs/lib/helpers/find-element-strategy.js

A nodejs bindings implementation for selenium 2.0/webdriver

module.exports = function findStrategy(args) {
    var using;
    var value = args[0];
    var callback = args[1];

    if (args.length === 3) {
        return {
            using: args[0],
            value: args[1],
            callback: args[2]
        }
    }

    // check value type
    // use id strategy if value starts with # and doesnt contain any other CSS selector-relevant character
    if(value.indexOf('#') === 0 && value.search(/(\s|>|\.|[|])/) === -1) {
        using = 'id';
        value = value.slice(1);

    // use xPath strategy if value starts with //
    } else if(value.indexOf('//') === 0 || value.indexOf('(//') === 0) {
        using = 'xpath';

    // use link text startegy if value startes with =
    } else if(value.indexOf('=') === 0) {
        using = 'link text';
        value = value.slice(1);

    // use partial link text startegy if value startes with =*
    } else if(value.indexOf('*=') === 0) {
        using = 'partial link text';
        value = value.slice(2);

    // use tag name strategy if value contains a tag
    // e.g. "<div>" or "<div />"
    } else if(value.search(/<[a-zA-Z-]+( \/)*>/g) >= 0) {
        using = 'tag name';
        value = value.replace(/<|>|\/|\s/g,'');

    // use name strategy if value queries elements with name attributes
    // e.g. "[name='myName']" or '[name="myName"]'
    } else if(value.search(/^\[name=("|')([a-zA-z0-9-_ ]+)("|')\]$/) >= 0) {
        using = 'name';
        value = value.match(/^\[name=("|')([a-zA-z0-9-_ ]+)("|')\]$/)[2];

    // if nothing fits with the supported strategies we fall back to the css selector strategy
    } else {
        using = 'css selector';
    }

    return {
        using: using,
        value: value,
        callback: callback
    }
}