如何在selenium PHP单元中切换到iframe

我想写一个测试来登录一个站点。问题是，当我点击登录时，会出现一个弹出窗口，它是一个iframe。现在我编写代码在窗口之间切换。但我在不同的iframe中切换。我不知道这段代码是从哪里来的。我使用Facebook编写的selenium WebDriver

<?php
class TitleTest extends PHPUnit_Framework_TestCase {

protected $webDriver;
public function setUp()
{
    $capabilities = array(\WebDriverCapabilityType::BROWSER_NAME => 'firefox');
    $this->webDriver = RemoteWebDriver::create('http://ip-address:4444/wd/hub', $capabilities);
}
protected $url = 'https://mywebsite.net';

public function testAfterLoginBudliTitle()
{
    // Sell used Login and account page's title assert
    $this->webDriver->get($this->url);
    $this->webDriver->manage()->window()->maximize();
    $link = $this->webDriver->findElement(WebDriverBy::xpath('/html/body/div[3]/header/div[2]/div/ul/li[2]/a'));
    sleep(2);        
    $link->click(); //click on login
    sleep(3);
    $iframe = $this->webDriver->findElement(WebDriverBy::tagName('iframe'));

    $frameName = $iframe->getAttribute('name');
    //Switch the driver to the iframe
    $this->webDriver->switchTo()->frame($frameName);
    $this->assertContains('demo', $frameName); // Here I get the different iframe name
 }  
}
?>

---

要与帧或iframe内的元素交互，请先切换到该帧

$my_frame = 'id_or_name';
$driver->switchTo()->frame($my_frame);

... do your stuff here and switch back afterwards ...

$driver->switchTo()->defaultContent();

请看维基
 我们使用$this->frame（0），对于phpunit selenium框架，我不确定Facebook库，但您可以像这样搜索类似的内容