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How to use Require.FileStateChecker class of org.openqa.selenium.internal package

Best Selenium code snippet using org.openqa.selenium.internal.Require.FileStateChecker

Require.FileStateChecker

Using AI Code Generation

1public class FileStateChecker {2    private final long timeout;3    private final long interval;4    private final TimeUnit unit;5    public FileStateChecker(long timeout, long interval, TimeUnit unit) {6        this.timeout = timeout;7        this.interval = interval;8        this.unit = unit;9    }10    public boolean waitFor(File file) {11        long end = System.currentTimeMillis() + unit.toMillis(timeout);12        while (System.currentTimeMillis() < end) {13            if (file.exists()) {14                return true;15            }16            Uninterruptibles.sleepUninterruptibly(interval, TimeUnit.MILLISECONDS);17        }18        return false;19    }20}21public class FileDownloadTest {22    private WebDriver driver;23    public void setUp() {24        driver = new FirefoxDriver();25    }26    public void tearDown() {27        driver.quit();28    }29    public void testFileDownload() {30        driver.findElement(By.cssSelector("a[href='some-file.txt']")).click();31        File file = new File("C:\\Users\\admin\\Downloads\\some-file.txt");32        FileStateChecker checker = new FileStateChecker(10, 1, TimeUnit.SECONDS);33        assertTrue(checker.waitFor(file));34    }35}

Require.FileStateChecker

Using AI Code Generation

1package com.automation;2import org.openqa.selenium.WebDriver;3import org.openqa.selenium.firefox.FirefoxDriver;4public class FileStateChecker {5	public static void main(String[] args) {6		WebDriver driver = new FirefoxDriver();7		System.out.println("Page Title is: " + driver.getTitle());8		driver.quit();9	}10}

Require.FileStateChecker

Using AI Code Generation

1import org.openqa.selenium.internal.Require;2FileStateChecker checker = Require.FileStateChecker();3checker.waitForFile("C:\\path\\to\\file.txt", 10, 500);4import org.openqa.selenium.internal.Require;5FileStateChecker checker = Require.FileStateChecker();6checker.waitForFile("C:\\path\\to\\file.txt", 10, 500);7import org.openqa.selenium.internal.Require;8FileStateChecker checker = Require.FileStateChecker();9checker.waitForFile("C:\\path\\to\\file.txt", 10, 500);10import org.openqa.selenium.internal.Require;11FileStateChecker checker = Require.FileStateChecker();12checker.waitForFile("C:\\path\\to\\file.txt", 10, 500);13import org.openqa.selenium.internal.Require;14FileStateChecker checker = Require.FileStateChecker();15checker.waitForFile("C:\\path\\to\\file.txt", 10, 500);16import org.openqa.selenium.internal.Require;17FileStateChecker checker = Require.FileStateChecker();18checker.waitForFile("C:\\path\\to\\file.txt", 10, 500);19import org.openqa.selenium.internal.Require;

StackOverFlow community discussions

Questions

Discussion

Browser memory leak automation using Selenium and Chrome Dev Tools

How and when to implement refreshed(ExpectedCondition<T> condition) of Selenium WebDriver?

Selenium WebDriver - compile HTML string

java.lang.NoClassDefFoundError ANT build

How can I ask the Selenium-WebDriver to wait for few seconds in Java?

Is there any way to get <embed> tag resources in selenium webdriver

JAVA Selenium Webdriver Ask where to save each file before downloading

How to get css class name using Selenium?

handling "are you sure you want to navigate away from this page" Msg in Selenium 2.0

Selenium Webdriver: Entering text into text field

Selenium supports org.openqa.selenium.JavascriptExecutor. We can get the value of window.performance.memory.usedJSHeapSize at any stage during testing. Below is the code.

  public static void reportMemoryUsage(WebDriver webDriver, String message) {
    ((JavascriptExecutor) webDriver).executeScript("window.gc()");
    try {
        TimeUnit.SECONDS.sleep(2);
    } catch (InterruptedException e) {
        LOGGER.error(e.getLocalizedMessage());
    }
    Double usedJSHeapSize = (Double) ((JavascriptExecutor) webDriver)
            .executeScript("return window.performance.memory.usedJSHeapSize/1024/1024");
    LOGGER.info("Memory Usage at " + message + " - " + usedJSHeapSize + " MB ");
 }

Call this method from your test suite, one at beginning of the test and one at the end. Difference between two usedJSHeapSize values will give the memory leak.

I am forcing garbage collection before taking usedJSHeapSize, to make sure the there is no garbage information collected. To enable gc function on window, you will have to set the -js-flags=--expose-gc option.

ChromeOptions options = new ChromeOptions();
options.addArguments("-js-flags=--expose-gc");
WebDriver webDriver = new ChromeDriver(options);

https://stackoverflow.com/questions/54710571/browser-memory-leak-automation-using-selenium-and-chrome-dev-tools

According to the source:

Wrapper for a condition, which allows for elements to update by redrawing. This works around the problem of conditions which have two parts: find an element and then check for some condition on it. For these conditions it is possible that an element is located and then subsequently it is redrawn on the client. When this happens a {@link StaleElementReferenceException} is thrown when the second part of the condition is checked.

So basically, this is a method that waits until a DOM manipulation is finished on an object.

Typically, when you do driver.findElement that object represents what the object is.

When the DOM has manipulated, and say after clicking a button, adds a class to that element. If you try to perform an action on said element, it will throw StaleElementReferenceException since now the WebElement returned now does not represent the updated element.

You'll use refreshed when you expect DOM manipulation to occur, and you want to wait until it's done being manipulated in the DOM.

Example:

<body>
  <button id="myBtn" class="" onmouseover="this.class = \"hovered\";" />
</body>

// pseudo-code
1. WebElement button = driver.findElement(By.id("myBtn")); // right now, if you read the Class, it will return ""
2. button.hoverOver(); // now the class will be "hovered"
3. wait.until(ExpectedConditions.refreshed(button));
4. button = driver.findElement(By.id("myBtn")); // by this point, the DOM manipulation should have finished since we used refreshed.
5. button.getClass();  // will now == "hovered"

Note that if you perform say a button.click() at line #3, it will throw a StaleReferenceException since the DOM has been manipulated at this point.

In my years of using Selenium, I've never had to use this condition, so I believe that it is an "edge case" situation, that you most likely won't even have to worry about using. Hope this helps!

https://stackoverflow.com/questions/28026845/how-and-when-to-implement-refreshedexpectedconditiont-condition-of-selenium

You can use the data URI scheme to load some HTML with Selenium:

WebDriver driver = new FirefoxDriver();
driver.get("data:text/html;charset=utf-8," + htmlString);

https://stackoverflow.com/questions/44238341/selenium-webdriver-compile-html-string

The classpath is needed also when running the Jar file so that the JVM could find library classes. However, when using the jar attribute in the java task, "all classpath settings are ignored" (see https://ant.apache.org/manual/Tasks/java.html). The simplest way is to specify the main class and add the compiled Jar along with the library Jars located in the RunningPowerJars directory:

<target name="run" description="Run the jar file" depends="jar" >
    <java classname="RunningPower" fork="true">
       <classpath>
            <pathelement location="build/jar/RunningPower.jar"/>
            <fileset dir="${lib.dir}">
                <include name="**/*.jar" />
            </fileset>
        </classpath>
   </java>
</target>

An unrelated note is that you could use the properties defined in init throughout the buildfile. For example, in the jar target you can use ${classes.dir} instead of repeating build/class.

It still doesn't make sense why the build would fail if the classpath element is added inside the java task when using the jar attribute. Although it is ignored, it is weird that it is failing with the "failed to create task or type" error.

https://stackoverflow.com/questions/32123803/java-lang-noclassdeffounderror-ant-build

Well, there are two types of wait: explicit and implicit wait. The idea of explicit wait is

WebDriverWait.until(condition-that-finds-the-element);

The concept of implicit wait is

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

You can get difference in details here.

In such situations I'd prefer using explicit wait (fluentWait in particular):

public WebElement fluentWait(final By locator) {
    Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
            .withTimeout(30, TimeUnit.SECONDS)
            .pollingEvery(5, TimeUnit.SECONDS)
            .ignoring(NoSuchElementException.class);

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

    return  foo;
};

fluentWait function returns your found web element. From the documentation on fluentWait: An implementation of the Wait interface that may have its timeout and polling interval configured on the fly. Each FluentWait instance defines the maximum amount of time to wait for a condition, as well as the frequency with which to check the condition. Furthermore, the user may configure the wait to ignore specific types of exceptions whilst waiting, such as NoSuchElementExceptions when searching for an element on the page. Details you can get here

Usage of fluentWait in your case be the following:

WebElement textbox = fluentWait(By.id("textbox"));

This approach IMHO better as you do not know exactly how much time to wait and in polling interval you can set arbitrary timevalue which element presence will be verified through . Regards.

https://stackoverflow.com/questions/12858972/how-can-i-ask-the-selenium-webdriver-to-wait-for-few-seconds-in-java

You seem to have the PDF Viewer Chrome extension installed which does the PDF renderring if you run Chrome manually. If Chrome is started by chromedriver however, it runs without any browser extensions, which is why in that case you get the default behavior of Chrome (which is to render the PDF by itself).

If you actually need to verify that the PDF is loaded and rendered with that particular extension, then you can use the following method to load the extension also when Chrome is started by chromedriver (code taken from here):

ChromeOptions options = new ChromeOptions();
options.addExtensions(new File("/path/to/extension.crx"));
DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability(ChromeOptions.CAPABILITY, options);
ChromeDriver driver = new ChromeDriver(capabilities);

See here on how to get the crx file of your extension: Location of CRX in chrome after installation?

https://stackoverflow.com/questions/41844529/is-there-any-way-to-get-embed-tag-resources-in-selenium-webdriver

A better way would be to setup chrome to automatically download the file, then wait for a new file to appear and finally rename it.

Here is an example to download a PDF by clicking on a link and then rename it to "mydocument.pdf" :

// define the download folder
Path download_folder = Paths.get(System.getProperty("user.home") + "/Downloads");

// define the preferences
HashMap<String, Object> prefs = new HashMap<String, Object>();
prefs.put("download.default_directory", download_folder.toAbsolutePath());
prefs.put("download.prompt_for_download", false);
prefs.put("download.directory_upgrade", true);
prefs.put("plugins.plugins_disabled", new String[]{"Chrome PDF Viewer"});

// define the options
HashMap<String, Object> options = new HashMap<String, Object>();
options.put("prefs", prefs);

// define the capabilities
DesiredCapabilities capabilities = DesiredCapabilities.chrome();
capabilities.setCapability("chromeOptions", options);

// start the driver
WebDriver driver = new ChromeDriver(capabilities);

// click on a PDF link
driver.get("http://www.adobe.com/legal/terms.html");
driver.findElement(By.linkText("Adobe Creative SDK")).click();

// wait for the PDF to be downloaded
File file = WaitForNewFile(download_folder, ".pdf", 60);

// rename the downloaded file
file.renameTo(download_folder.resolve("mydocument.pdf").toFile());

// quit
driver.quit();

And for the file waiter :

/**
 * Waits for a new file to be downloaded with a file watcher
 */
public static File WaitForNewFile(Path folder, String extension, int timeout_sec) throws InterruptedException, IOException {
    long end_time = System.currentTimeMillis() + timeout_sec * 1000;
    try (WatchService watcher = FileSystems.getDefault().newWatchService()) {
        folder.register(watcher, StandardWatchEventKinds.ENTRY_MODIFY);
        for (WatchKey key; null != (key = watcher.poll(end_time - System.currentTimeMillis(), TimeUnit.MILLISECONDS)); key.reset()) {
            for (WatchEvent<?> event : key.pollEvents()) {
                File file = folder.resolve(((WatchEvent<Path>)event).context()).toFile();
                if (file.toString().toLowerCase().endsWith(extension.toLowerCase()))
                    return file;
            }
        }
    }
    return null;
}

https://stackoverflow.com/questions/36842428/java-selenium-webdriver-ask-where-to-save-each-file-before-downloading

Agree with Subir Kumar Sao and Faiz.

element_enter.findElement(By.xpath("//html/body/div[1]/div[3]/div[1]/form/div/div/input")).sendKeys(barcode);

https://stackoverflow.com/questions/19137109/selenium-webdriver-entering-text-into-text-field

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