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Writing a custom accessor

Writing a custom accessor

(OP)
There are three "kinds" of Selenium objects... Actions (click is a good example), Accessors (this is a good example) and Locators (xpath= is a good example).

You can extend all three of them... and end up by seriously cutting down the code you have to write in the tests (making it very englishy) and also making it easily configurable (and reusable).

I was recently asked how you can write a custom accessor. The following is a simple accessor (complete with supporting JSDoc - that is parsed by the Selenium IDE and shows as help).

CODE

/**
 * This accessor expects a table row to be passed in as a locator, and compares
 * the contents of the first table cell of that row with the data passed in as
 * l_sExpectedData.
 * @param {string} l_sLocator is a valid xpath or locator to a table tr node.
 * @param {string} l_sExpectedData is the data to compare against.
 * @type {boolean}
 * @return True if the data matches, otherwise False.
 */
Selenium.prototype.getFormRow(l_sLocator, l_sExpectedData)
{
    var l_bSuccess = false;
    var l_oFoundNode = this.page().findElement(l_sLocator);
    if (l_oFoundNode)
    {
        var l_pRowCells = l_oFoundNode.getElementsByTagName('td');
        if (l_pRowCells.length > 0)
        {
            var l_sActualData = l_pRowCells[0].innerHTML;
            if (l_sActualData == l_sExpectedData)
            {
                l_bSuccess = true;
            }
        }
    }
    return l_bSuccess;
};

Call this as (for example):
 > verifyFormRow
 > xpath=/::descendant/tr[1]
 > Some text

You can also use assertFormRow (and I think verifyNotFormRow and assertNotFormRow - but these may not work in the IDE).

If a method is created with getSomething(), then it will work with assertSomething() as well as verifySomething(). Using the string verify in the method name could then prove problematic (in terms of readability at least).

I found that once you start down the road of doing all this customisation, the IDE ceases to be of much use - since it only supports a subset of what you can do. I found I switched to using the Selenium Core and hand crafted the Selenium scripts in a text editor.

Cheers,
Jeff

Jeff's Blog @ CodeRambler
http://www.coderambler.com/
http://www.coedit.co.uk/


Make sure your web page and css validates properly against the doctype you have chosen - before you attempt to debug a problem!

FAQ216-6094: What is Javascript?

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