Automate page refresh using Selenium in Java until target element becomes visible

Question

Automate page refresh using Selenium in Java until target element becomes visible

Is there a way to have selenium wait for 3 minutes before refreshing the page until a specific element (in this case, the Download button) is found? I've attempted the code below, but it doesn't seem to be effective.

Note: I am trying to upload a zip file which sometimes takes a few seconds and other times up to 3 minutes. The code works fine when the file uploads quickly, but fails when it takes longer.

Any suggestions on how to improve this?

boolean displayed = false;
do {
  try {
    displayed = driver1.findElement(By.xpath("//*[@id=\"app\"]/main/div[1]/div/div/div/div[2]/table/tbody/tr[1]/td[4]/a")).isDisplayed();
  } catch (NoSuchElementException e) {
    System.out.println(e);
    driver1.navigate().refresh();
  }
} while (!displayed);

driver1.findElement(By.xpath("//*[@id=\"app\"]/main/div[1]/div/div/div/div[2]/table/tbody/tr[1]/td[4]/a")).click();

javascript java selenium-webdriver

Answer 1

Answer №1

Instead of relying on the .isDisplayed() method to determine if an element is visible, you can check the size of the element list and click on it if the size is greater than 0.
Here's an example:

    boolean isElementVisible = false;
    List<WebElement> elements = driver.findElements(By.xpath("//*[@id=\"app\"]/main/div[1]/div/div/div/div[2]/table/tbody/tr[1]/td[4]/a"));
    while (!isElementVisible) {
        if (elements.size() > 0) {
            // Element found, set flag to true
            isElementVisible = true;
            // Click on the element
            elements.get(0).click();
        } else {
            // Adding a static sleep of 10 seconds, this else condition can be removed as well
            Thread.sleep(10000);
        }
    }

Answer 2

Instead of relying on the .isDisplayed() method to determine if an element is visible, you can check the size of the element list and click on it if the size is greater than 0.
Here's an example:

    boolean isElementVisible = false;
    List<WebElement> elements = driver.findElements(By.xpath("//*[@id=\"app\"]/main/div[1]/div/div/div/div[2]/table/tbody/tr[1]/td[4]/a"));
    while (!isElementVisible) {
        if (elements.size() > 0) {
            // Element found, set flag to true
            isElementVisible = true;
            // Click on the element
            elements.get(0).click();
        } else {
            // Adding a static sleep of 10 seconds, this else condition can be removed as well
            Thread.sleep(10000);
        }
    }

Answer 3

Answer №2

As you mentioned, waiting for an element like a "Download button" to be found requires meeting a condition. In this case, one of the wait functionalities provided by selenium can be used.

Selenium offers three types of waits: Implicit Wait, Explicit Wait, and Fluent Wait.

For implicit wait, the code can be:

driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

Usage: This is useful when WebDriver needs to poll the DOM for a certain amount of time to find elements that are not immediately available. However, it's not recommended as a good practice.

Using explicit wait, the code would look like:

WebDriverWait wait = new WebDriverWait(driver, 10);
WebElement element = wait.until(
        ExpectedConditions.visibilityOfElementLocated(By.id("download_button_id")));

Usage: Explicit waits are defined to wait for a specific condition to occur before proceeding in the code. It waits until the expected condition returns successfully at intervals of 500 milliseconds by default.

When using fluent wait, the code is:

Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
    .withTimeout(30, SECONDS)
    .pollingEvery(5, SECONDS)
    .ignoring(NoSuchElementException.class);

WebElement foo = wait.until(new Function<WebDriver, WebElement>() 
{
  public WebElement apply(WebDriver driver) {
  return driver.findElement(By.id("foo"));
}
});

Usage: Fluent wait allows defining polling frequencies and exceptions to continue script execution if an element is not found. It's helpful when waiting for an element that appears periodically.

Select the appropriate wait type based on your requirements, with fluent wait being a suitable option in this scenario.

Answer 4

As you mentioned, waiting for an element like a "Download button" to be found requires meeting a condition. In this case, one of the wait functionalities provided by selenium can be used.

Selenium offers three types of waits: Implicit Wait, Explicit Wait, and Fluent Wait.

For implicit wait, the code can be:

driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

Usage: This is useful when WebDriver needs to poll the DOM for a certain amount of time to find elements that are not immediately available. However, it's not recommended as a good practice.

Using explicit wait, the code would look like:

WebDriverWait wait = new WebDriverWait(driver, 10);
WebElement element = wait.until(
        ExpectedConditions.visibilityOfElementLocated(By.id("download_button_id")));

Usage: Explicit waits are defined to wait for a specific condition to occur before proceeding in the code. It waits until the expected condition returns successfully at intervals of 500 milliseconds by default.

When using fluent wait, the code is:

Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
    .withTimeout(30, SECONDS)
    .pollingEvery(5, SECONDS)
    .ignoring(NoSuchElementException.class);

WebElement foo = wait.until(new Function<WebDriver, WebElement>() 
{
  public WebElement apply(WebDriver driver) {
  return driver.findElement(By.id("foo"));
}
});

Usage: Fluent wait allows defining polling frequencies and exceptions to continue script execution if an element is not found. It's helpful when waiting for an element that appears periodically.

Select the appropriate wait type based on your requirements, with fluent wait being a suitable option in this scenario.

Automate page refresh using Selenium in Java until target element becomes visible

Answer №1

Answer №2

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