在 selenium webdriver 上的 javascript 中使用 xpath() 计算元素数量

Question

I am writing test script in selenium webdriver using javascript.

I am using mocha and phantomJS too.

I want to count total no. of <li> in a <ul> having a particular id.

I am using this script:

var majorSize = driver.findElements(By.xpath("//ul[contains(@id, 'side-menu')]/li[not(contains(@class, 'nav-header'))]")).size();
console.log(majorSize);

I used the reference from this

But I am getting error:

TypeError: undefined is not a function

In javascript, I can use this code also:

driver.findElements(By.xpath("//ul[contains(@id, 'side-menu')]/li[not(contains(@class, 'nav-header'))]")).then(function(majorSize)
{
   console.log(majorSize.legth)
});
console.log(majorSize.legnth);

The above script has majorLink scope withing the then() function only. So it can't be used outside. But I need it to be used outside as well.

If I define something like var majorSize , then also it just displays 0 outside the then() function.

What wrong am I doing?

Here is the HTML code:

<ul id="side-menu" class="nav">
    <li class="nav-header">
    <img class="logo" alt="Track Revenue" src="/images/3c4939d.png">
    <div class="logo-element"> TR </div>
    </li>
    <li class="">
    <a href="#home">
    <i class="fa fa-bolt"></i>
    <span class="nav-label">Tr Admin Menu</span>
    <span class="fa arrow"></span>
    </a>
    <ul class="nav nav-second-level collapse" aria-expanded="false" style="height: 0px;">
        <li>
        <a href="/admin/user/">All Users</a>
        </li>
        <li>
        <a href="/admin/company/">All Companies</a>
        </li>
        <li>
        <a href="/admin/device/">Devices</a>
        </li>
        <li>
        <a href="/admin/email/">Send Email</a>
        </li>
        <li>
        <a href="/admin/impersonate">Impersonate User</a>
        </li>
        <li>
        <a href="/admin/encrypttest">Test Encryption</a>
        </li>
    </ul>
    </li>
    <li class="">
    <a href="#home">
    <i class="fa fa-th-large"></i>
    <span class="nav-label">Campaigns</span>
    <span class="fa arrow"></span>
    </a>
    <ul class="nav nav-second-level collapse" aria-expanded="false" style="height: 0px;">
    <li>
    <a href="http://demotest.com.co/main/account/campaign_overview.php">Overview</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/campaign_update_cpc.php">CPC Update</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/campaign_update_subids.php">SubID Update</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/campaign_v2.php">Add Campaign</a>
        </li>
    </ul>
    </li>
    <li>
    <a href="#home">
    <i class="fa fa-bar-chart-o"></i>
    <span class="nav-label">Stats</span>
    <span class="fa arrow"></span>
    </a>
    <ul class="nav nav-second-level collapse">
        <li>
        <a href="http://demotest.com.co/main/account/stats_campaign_v2.php">Campaign Stats</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/stats_week_day_v2.php">Week / Day Parting Stats</a>
        </li>
    </ul>
    </li>
    <li>
    <a href="#home">
    <i class="fa fa-files-o"></i>
    <span class="nav-label">Reports</span>
    <span class="fa arrow"></span>
    </a>
    <ul class="nav nav-second-level collapse">
        <li>
        <a href="http://demotest.com.co/main/account/report_custom.php">Custom Data Reports</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/report_subid.php">SubID Analysis Report</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/completed_report.php">Scheduled Reports</a>
        </li>
    </ul>
    </li>
    <li>
    <a href="#home">
    <i class="fa fa-cog"></i>
    <span class="nav-label">Settings</span>
    <span class="fa arrow"></span>
    </a>
    <ul class="nav nav-second-level collapse">
        <li>
        <a href="/profile/">Account</a>
        </li>
        <li>
        <a href="/plan/">Plan Management</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/settings_groups.php">Campaign Groups</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/settings_network.php">Affiliate Networks</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/settings_sources.php">Traffic Source</a>
        </li>
        <li>
        <a href="/manage/user/">Manage Users</a>
        </li>
        <li>
        <a href="/manage/company/">Manage Company</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/settings_rules.php">Blocking & Filter Rules</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/domains.php">Domains</a>
        </li>
        <li>
        <a href="http://demotest.com.co/main/account/campaign_archive.php">Campaign Maintenance</a>
        </li>
    </ul>
    </li>
</ul>

Answer 1

If I understand correctly, you want all the LI s (and only the LI s) that are children of the UL with id = side-menu . Is that correct? This is in Java but hopefully you can translate it.

List<WebElement> lis = driver.findElements(By.cssSelector("#side-menu > li"));
System.out.println(lis.size());

This CSS selector means find an element with an ID (#) of side-menu that has children LI s. These are direct children and not descendants.