我们怎样才能获得使用Selenium WebDriver加载页面的准确时间？

Question

如何使用Selenium WebDriver获取加载页面的确切时间？

我们使用Thread.sleep

我们使用implicitlyWait

我们使用WebDriverWait

但是如何使用Selenium WebDriver获取加载页面的确切时间？

Answer 1

如果您想知道使用Selenium WebDriver（a.k.a Selenium 2）完全加载页面需要多长时间。

通常，只有在页面完全加载后，WebDriver才会将控制权返回给您的代码。

因此，以下Selenium Java代码可以帮助您找到页面加载的时间 -

long start = System.currentTimeMillis();

driver.get("Some url");

long finish = System.currentTimeMillis();
long totalTime = finish - start; 
System.out.println("Total Time for page load - "+totalTime); 

如果这不起作用，那么你必须等到页面上显示一些元素 -

 long start = System.currentTimeMillis();

driver.get("Some url");

WebElement ele = driver.findElement(By.id("ID of some element on the page which will load"));
long finish = System.currentTimeMillis();
long totalTime = finish - start; 
System.out.println("Total Time for page load - "+totalTime); 

Answer 2

您可以使用org.apache.commons.lang3.time包的StopWatch对象。以下是使用Java的Selenium WebDriver的完整代码：

    int BUFFER_SIZE = 4096;
    String name = "file.txt";
    String method = "PUT";
    String bucket = "bucket";
    String secretKey = "******";
    String filePath = "F:\\file.txt";
    SimpleDateFormat df = new SimpleDateFormat("EEE', 'dd' 'MMM' 'yyyy' 'HH:mm:ss' 'Z", Locale.US);
    Date date = new Date();
    String formattedDate = df.format(date);
    File uploadFile = new File(filePath);


    URL url = new URL("http://bucket.s3.amazonaws.com/" + name);
    HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
    String resource = "/" + bucket + "/" + name;
    String contentType = "text/plain";
    String signn = method + "\n\n" + contentType + "\n" + formattedDate + "\n" + resource ;
    Mac hmac = Mac.getInstance("HmacSHA1");
    hmac.init(new SecretKeySpec(
            secretKey.getBytes("UTF-8"), "HmacSHA1"));
    String signature = (new BASE64Encoder()).encode(
            hmac.doFinal(signn.getBytes("UTF-8"))).replaceAll("\n", "");

    String authAWS = "AWS " + "**SECRET**" + ":" + signature;
    httpConn.setDoOutput(true);
    httpConn.setRequestMethod(method);
    httpConn.setRequestProperty("Accept", "*/*");
    httpConn.setRequestProperty("Date", formattedDate);
    httpConn.setRequestProperty("Content-type", contentType);
    httpConn.setRequestProperty("Authorization", authAWS);


    httpConn.setRequestProperty("x-amz-acl", "public-read");  // <----- THIS LINE HERE!


    OutputStream outputStream = httpConn.getOutputStream();
    FileInputStream inputStream = new FileInputStream(uploadFile);
    byte[] buffer = new byte[BUFFER_SIZE];
    int bytesRead = -1;
    while ((bytesRead = inputStream.read(buffer)) != -1) {
        outputStream.write(buffer, 0, bytesRead);
    }
    outputStream.close();
    inputStream.close();
    System.out.println("Response message : " + httpConn.getResponseMessage());

Answer 3

我也有此要求，我使用了浏览器提供的performance.timeOrigin对象。我在C＃中使用了它，但是对于这个问题，我修改了@Ripon Al Wasim答案，以使其适用于Java。

import org.apache.commons.lang3.time.StopWatch;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;

public class TimerInSeleniumWebDriver {
    public static void main(String[] args) {
        WebDriver driver;
        driver = new FirefoxDriver();
        //Open your web app (In my case, I opened facebook)
        driver.get("https://www.facebook.com/");
        // Wait for the required any element (I am waiting for Login button in fb)
        WebDriverWait wait = new WebDriverWait(driver, 10);
        wait.until(ExpectedConditions.presenceOfElementLocated(By.id("u_0_l")));
        //Get the time
        long pageLoadTime_ms = getPageLoadTime();
        long pageLoadTime_Seconds = pageLoadTime_ms / 1000;
        System.out.println("Total Page Load Time: " + pageLoadTime_ms + " milliseconds");
        System.out.println("Total Page Load Time: " + pageLoadTime_Seconds + " seconds");
        driver.close();
    }
      public static long getPageLoadTime(WebDriver driver){
        //Creating the JavascriptExecutor interface object by Type casting      
        JavascriptExecutor js = (JavascriptExecutor)driver;     

      //This will get you the time passed since you page navigation started 
      return (Long)((JavascriptExecutor)driver).executeScript("return Date.now() - performance.timeOrigin;"");  
    }
}

只需在需要获取页面加载时间的位置调用以下方法即可。

  public static long getPageLoadTime(WebDriver driver){
        //Creating the JavascriptExecutor interface object by Type casting      
        JavascriptExecutor js = (JavascriptExecutor)driver;     

      //This will get you the time passed since you page navigation started     
      return (Long)((JavascriptExecutor)driver).executeScript("return Date.now() - performance.timeOrigin;"");  
    }

您不必担心页面加载从哪里开始，但是就像其他答案一样，您必须在页面加载完成后立即将其放入。

这类似于StopWatch，但更干净（无需启动，停止，重置）。

Answer 4

使用TestListners获得最佳体验：

@AfterMethod
    public void getResult(ITestResult result) throws Exception {
        String sMethodName = "";
        Long lExecutionTime;
        sMethodName = result.getMethod().getMethodName().toString();
        lExecutionTime = (result.getEndMillis() - result.getStartMillis()) / 1000;
        System.out.println(sMethodName + " execution Time is : " + lExecutionTime + "sec.");
    }

Answer 5

driver.manage（）。timeouts（）。pageLoadTimeout（60，TimeUnit.SECONDS）;