Selenium - clicking on youtube links - selenium

Question

I just tried to open the first search result of the youtube link.
Here is my code. Since the youtube results are in iFrame, I used SwitchTo.frame()method.
String browser = "Chrome";
WebDriver b = null;
if(browser.equals("Chrome")) {
System.setProperty("webdriver.chrome.driver", "C:\\chromedriver_win32\\chromedriver.exe");
b = new ChromeDriver();
}
else if (browser.equals("firefox")) {
b = new FirefoxDriver();
}
b.get("http://www.youtube.com/");
b.findElement(By.xpath("//*[#id='masthead-search-term']")).sendKeys("selenium tutorial for beginner");
b.findElement(By.xpath("//*[#id='masthead-search-term']")).sendKeys(Keys.RETURN);
b.switchTo().frame("pyv-iframe"); //youtube search results are in iframe
//b.findElement(By.linkText("Selenium IDE Demo - Quick Beginner's Tutorial")).click();
b.findElement(By.xpath("//*[#id='search-results']/li[1]/div[2]/h3/a/span")).click();
While running this code it returns as
Exception in thread "main" org.openqa.selenium.NoSuchElementException: no such element
at findElement By xpath. Please tell me what am I missing. Please see me as a newbie to Selenium.

Answer 1

I'm not sure why you are saying that the results are in an <iframe>... I'm not seeing an iframe. Here is your script using the getting started with selenium framework:
#Config(url="http://youtube.com")
public class YouTubeTest extends AutomationTest {
#Test
public void myTest() {
setText(By.id("masthead-search-term"), "selenium tutorial for beginner")
.click(By.id("search-btn"))
// navigate to a search result based on index
.click(By.cssSelector("ol#search-results > li:nth-child(X) a.yt-uix-tile-link"))
;
}
}
on the click(By.cssSelector you need to replace the X value with 1, 2, etc.. whatever the index of the link you want to click is.
(If you aren't using that framework you can easily translate the code and extract the selectors I use)

Answer 2

I did investigate on the Youtube page in Selenium IDE and it did get me these results:
driver = new FirefoxDriver();
baseUrl = "http://www.youtube.com/";
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
driver.get(baseUrl + "/results?search_query=selenium&sm=3");
driver.findElement(By.id("masthead-search-term")).clear();
driver.findElement(By.id("masthead-search-term")).sendKeys("selenium");
driver.findElement(By.cssSelector("span.yt-ui-ellipsis-wrapper")).click();
Please note the last line: Thats where I clicked on the first search result. After investigating the Youtube page with Web Developer tools I realised that here is a iframe but it contains only some tracking code for AdSense (my guess)
General note: Always try to investigate with Selenium IDE first. It saved me from a lots of nightmares about my selenium code ;)