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Troubleshooting Assistance

How to get manage WebDriver problems.

It is not always obvious the root cause of errors in Selenium.

  1. The most common Selenium-related error is a result of poor synchronization. Read about Waiting Strategies. If you aren’t sure if it is a synchronization strategy you can try temporarily hard coding a large sleep where you see the issue, and you’ll know if adding an explicit wait can help.

  2. Note that many errors that get reported to the project are actually caused by issues in the underlying drivers that Selenium sends the commands to. You can rule out a driver problem by executing the command in multiple browsers.

  3. If you have questions about how to do things, check out the Support options for ways get assistance.

  4. If you think you’ve found a problem with Selenium code, go ahead and file a Bug Report on GitHub.

1 - Understanding Common Errors

How to get deal with various problems in your Selenium code.

Invalid Selector Exception

CSS and XPath Selectors are sometimes difficult to get correct.

Likely Cause

The CSS or XPath selector you are trying to use has invalid characters or an invalid query.

Possible Solutions

Run your selector through a validator service:

Or use a browser extension to get a known good value:

No Such Element Exception

The element can not be found at the exact moment you attempted to locate it.

Likely Cause

  • You are looking for the element in the wrong place (perhaps a previous action was unsuccessful).
  • You are looking for the element at the wrong time (the element has not shown up in the DOM, yet)
  • The locator has changed since you wrote the code

Possible Solutions

  • Make sure you are on the page you expect to be on, and that previous actions in your code completed correctly
  • Make sure you are using a proper Waiting Strategy
  • Update the locator with the browser’s devtools console or use a browser extension like:

Stale Element Reference Exception

An element goes stale when it was previously located, but can not be currently accessed. Elements do not get relocated automatically; the driver creates a reference ID for the element and has a particular place it expects to find it in the DOM. If it can not find the element in the current DOM, any action using that element will result in this exception.

Common Causes

This can happen when:

  • You have refreshed the page, or the DOM of the page has dynamically changed.
  • You have navigated to a different page.
  • You have switched to another window or into or out of a frame or iframe.

Common Solutions

The DOM has changed

When the page is refreshed or items on the page have moved around, there is still an element with the desired locator on the page, it is just no longer accessible by the element object being used, and the element must be relocated before it can be used again. This is often done in one of two ways:

  • Always relocate the element every time you go to use it. The likelihood of the element going stale in the microseconds between locating and using the element is small, though possible. The downside is that this is not the most efficient approach, especially when running on a remote grid.

  • Wrap the Web Element with another object that stores the locator, and caches the located Selenium element. When taking actions with this wrapped object, you can attempt to use the cached object if previously located, and if it is stale, exception can be caught, the element relocated with the stored locator, and the method re-tried. This is more efficient, but it can cause problems if the locator you’re using references a different element (and not the one you want) after the page has changed.

The Context has changed

Element objects are stored for a given context, so if you move to a different context — like a different window or a different frame or iframe — the element reference will still be valid, but will be temporarily inaccessible. In this scenario, it won’t help to relocate the element, because it doesn’t exist in the current context. To fix this, you need to make sure to switch back to the correct context before using the element.

The Page has changed

This scenario is when you haven’t just changed contexts, you have navigated to another page and have destroyed the context in which the element was located. You can’t just relocate it from the current context, and you can’t switch back to an active context where it is valid. If this is the reason for your error, you must both navigate back to the correct location and relocate it.

Invalid SessionId Exception

Sometimes the session you’re trying to access is different than what’s currently available

Likely Cause

This usually occurs when the session has been deleted (e.g. driver.quit()) or if the session has changed, like when the last tab/browser has closed (e.g. driver.close())

Possible Solutions

Check your script for instances of driver.close() and driver.quit(), and any other possible causes of closed tabs/browsers. It could be that you are locating an element before you should/can.

1.1 - Unable to Locate Driver Error

Troubleshooting missing path to driver executable.

Historically, this is the most common error beginning Selenium users get when trying to run code for the first time:

The path to the driver executable must be set by the webdriver.chrome.driver system property; for more information, see https://chromedriver.chromium.org/. The latest version can be downloaded from https://chromedriver.chromium.org/downloads
The executable chromedriver needs to be available in the path.
The file geckodriver does not exist. The driver can be downloaded at https://github.com/mozilla/geckodriver/releases"
Unable to locate the chromedriver executable;

Likely cause

Through WebDriver, Selenium supports all major browsers. In order to drive the requested browser, Selenium needs to send commands to it via an executable driver. This error means the necessary driver could not be found by any of the means Selenium attempts to use.

Possible solutions

There are several ways to ensure Selenium gets the driver it needs.

Use the latest version of Selenium

As of Selenium 4.6, Selenium downloads the correct driver for you. You shouldn’t need to do anything. If you are using the latest version of Selenium and you are getting an error, please turn on logging and file a bug report with that information.

If you want to read more information about how Selenium manages driver downloads for you, you can read about the Selenium Manager.

Use the PATH environment variable

This option first requires manually downloading the driver.

This is a flexible option to change location of drivers without having to update your code, and will work on multiple machines without requiring that each machine put the drivers in the same place.

You can either place the drivers in a directory that is already listed in PATH, or you can place them in a directory and add it to PATH.

To see what directories are already on PATH, open a Terminal and execute:

echo $PATH

If the location to your driver is not already in a directory listed, you can add a new directory to PATH:

echo 'export PATH=$PATH:/path/to/driver' >> ~/.bash_profile
source ~/.bash_profile

You can test if it has been added correctly by checking the version of the driver:

chromedriver --version

To see what directories are already on PATH, open a Terminal and execute:

echo $PATH

If the location to your driver is not already in a directory listed, you can add a new directory to PATH:

echo 'export PATH=$PATH:/path/to/driver' >> ~/.zshenv
source ~/.zshenv

You can test if it has been added correctly by checking the version of the driver:

chromedriver --version

To see what directories are already on PATH, open a Command Prompt and execute:

echo %PATH%

If the location to your driver is not already in a directory listed, you can add a new directory to PATH:

setx PATH "%PATH%;C:\WebDriver\bin"

You can test if it has been added correctly by checking the version of the driver:

chromedriver.exe --version

Specify the location of the driver

If you cannot upgrade to the latest version of Selenium, you do not want Selenium to download drivers for you, and you can’t figure out the environment variables, you can specify the location of the driver in the Service object.

You first need to download the desired driver, then create an instance of the applicable Service class and set the path.

Specifying the location in the code itself has the advantage of not needing to figure out Environment Variables on your system, but has the drawback of making the code less flexible.

Driver management libraries

Before Selenium managed drivers itself, other projects were created to do so for you.

If you can’t use Selenium Manager because you are using an older version of Selenium (please upgrade), or need an advanced feature not yet implemented by Selenium Manager, you might try one of these tools to keep your drivers automatically updated:

Download the driver

NavegadorOS SuportadoMantido porDownloadRastreador de Problemas
Chromium/ChromeWindows/macOS/LinuxGoogleDownloadsProblemas
FirefoxWindows/macOS/LinuxMozillaDownloadsProblemas
EdgeWindows/macOS/LinuxMicrosoftDownloadsProblemas
Internet ExplorerWindowsProjeto SeleniumDownloadsProblemas
SafarimacOS High Sierra e superioresAppleIntegrado no SistemaProblemas

Nota: O Opera driver já não inclui as funcionalidades mais recentes do Selenium e oficialmente deixou de ser suportado.

2 - Logging Selenium commands

Getting information about Selenium execution.

Turning on logging is a valuable way to get extra information that might help you determine why you might be having a problem.

Getting a logger

Java logs are typically created per class. You can work with the default logger to work with all loggers. To filter out specific classes, see Filtering

Get the root logger:

        Logger logger = Logger.getLogger("");
View full example on GitHub

Java Logging is not exactly straightforward, and if you are just looking for an easy way to look at the important Selenium logs, take a look at the Selenium Logger project

Python logs are typically created per module. You can match all submodules by referencing the top level module. So to work with all loggers in selenium module, you can do this:

    logger = logging.getLogger('selenium')
View full example on GitHub

.NET logger is managed with a static class, so all access to logging is managed simply by referencing Log from the OpenQA.Selenium.Internal.Logging namespace.

If you want to see as much debugging as possible in all the classes, you can turn on debugging globally in Ruby by setting $DEBUG = true.

For more fine-tuned control, Ruby Selenium created its own Logger class to wrap the default Logger class. This implementation provides some interesting additional features. Obtain the logger directly from the #loggerclass method on the Selenium::WebDriver module:

    logger = Selenium::WebDriver.logger
View full example on GitHub
const logging = require('selenium-webdriver/lib/logging')
logger = logging.getLogger('webdriver')

Logger level

Logger level helps to filter out logs based on their severity.

Java has 7 logger levels: SEVERE, WARNING, INFO, CONFIG, FINE, FINER, and FINEST. The default is INFO.

You have to change both the level of the logger and the level of the handlers on the root logger:

        logger.setLevel(Level.FINE);
        Arrays.stream(logger.getHandlers()).forEach(handler -> {
            handler.setLevel(Level.FINE);
        });
View full example on GitHub

Python has 6 logger levels: CRITICAL, ERROR, WARNING, INFO, DEBUG, and NOTSET. The default is WARNING

To change the level of the logger:

    logger.setLevel(logging.DEBUG)
View full example on GitHub

Things get complicated when you use PyTest, though. By default, PyTest hides logging unless the test fails. You need to set 3 things to get PyTest to display logs on passing tests.

To always output logs with PyTest you need to run with additional arguments. First, -s to prevent PyTest from capturing the console. Second, -p no:logging, which allows you to override the default PyTest logging settings so logs can be displayed regardless of errors.

So you need to set these flags in your IDE, or run PyTest on command line like:

pytest -s -p no:logging

Finally, since you turned off logging in the arguments above, you now need to add configuration to turn it back on:

logging.basicConfig(level=logging.WARN)

.NET has 6 logger levels: Error, Warn, Info, Debug, Trace and None. The default level is Info.

To change the level of the logger:

            Log.SetLevel(LogEventLevel.Trace);
View full example on GitHub

Ruby logger has 5 logger levels: :debug, :info, :warn, :error, :fatal. As of Selenium v4.9.1, The default is :info.

To change the level of the logger:

    logger.level = :debug
View full example on GitHub

JavaScript has 9 logger levels: OFF, SEVERE, WARNING, INFO, DEBUG, FINE, FINER, FINEST, ALL. The default is OFF.

To change the level of the logger:

logger.setLevel(logging.Level.INFO)

Actionable items

Things are logged as warnings if they are something the user needs to take action on. This is often used for deprecations. For various reasons, Selenium project does not follow standard Semantic Versioning practices. Our policy is to mark things as deprecated for 3 releases and then remove them, so deprecations may be logged as warnings.

Java logs actionable content at logger level WARN

Example:

May 08, 2023 9:23:38 PM dev.selenium.troubleshooting.LoggingTest logging
WARNING: this is a warning

Python logs actionable content at logger level — WARNING Details about deprecations are logged at this level.

Example:

WARNING  selenium:test_logging.py:23 this is a warning

.NET logs actionable content at logger level Warn.

Example:

11:04:40.986 WARN LoggingTest: this is a warning

Ruby logs actionable content at logger level — :warn. Details about deprecations are logged at this level.

For example:

2023-05-08 20:53:13 WARN Selenium [:example_id] this is a warning

Because these items can get annoying, we’ve provided an easy way to turn them off, see filtering section below.

Useful information

This is the default level where Selenium logs things that users should be aware of but do not need to take actions on. This might reference a new method or direct users to more information about something

Java logs useful information at logger level INFO

Example:

May 08, 2023 9:23:38 PM dev.selenium.troubleshooting.LoggingTest logging
INFO: this is useful information

Python logs useful information at logger level — INFO

Example:

INFO     selenium:test_logging.py:22 this is useful information

.NET logs useful information at logger level Info.

Example:

11:04:40.986 INFO LoggingTest: this is useful information

Ruby logs useful information at logger level — :info.

Example:

2023-05-08 20:53:13 INFO Selenium [:example_id] this is useful information

Logs useful information at level: INFO

Debugging Details

The debug log level is used for information that may be needed for diagnosing issues and troubleshooting problems.

Java logs most debug content at logger level FINE

Example:

May 08, 2023 9:23:38 PM dev.selenium.troubleshooting.LoggingTest logging
FINE: this is detailed debug information

Python logs debugging details at logger level — DEBUG

Example:

DEBUG    selenium:test_logging.py:24 this is detailed debug information

.NET logs most debug content at logger level Debug.

Example:

11:04:40.986 DEBUG LoggingTest: this is detailed debug information

Ruby only provides one level for debugging, so all details are at logger level — :debug.

Example:

2023-05-08 20:53:13 DEBUG Selenium [:example_id] this is detailed debug information

Logs debugging details at level: FINER and FINEST

Logger output

Logs can be displayed in the console or stored in a file. Different languages have different defaults.

By default all logs are sent to System.err. To direct output to a file, you need to add a handler:

        Handler handler = new FileHandler("selenium.xml");
        logger.addHandler(handler);
View full example on GitHub

By default all logs are sent to sys.stderr. To direct output somewhere else, you need to add a handler with either a StreamHandler or a FileHandler:

    handler = logging.FileHandler(log_path)
    logger.addHandler(handler)
View full example on GitHub

By default all logs are sent to System.Console.Error output. To direct output somewhere else, you need to add a handler with a FileLogHandler:

            Log.Handlers.Add(new FileLogHandler(filePath));
View full example on GitHub

By default, logs are sent to the console in stdout.
To store the logs in a file:

    logger.output = file_name
View full example on GitHub

JavaScript does not currently support sending output to a file.

To send logs to console output:

logging.installConsoleHandler()

Logger filtering

Java logging is managed on a per class level, so instead of using the root logger (Logger.getLogger("")), set the level you want to use on a per-class basis:

        Logger.getLogger(RemoteWebDriver.class.getName()).setLevel(Level.FINEST);
        Logger.getLogger(SeleniumManager.class.getName()).setLevel(Level.SEVERE);
View full example on GitHub
Because logging is managed by module, instead of working with just "selenium", you can specify different levels for different modules:
    logging.getLogger('selenium.webdriver.remote').setLevel(logging.WARN)
    logging.getLogger('selenium.webdriver.common').setLevel(logging.DEBUG)
View full example on GitHub

.NET logging is managed on a per class level, set the level you want to use on a per-class basis:

            Log.SetLevel(typeof(RemoteWebDriver), LogEventLevel.Debug);
            Log.SetLevel(typeof(SeleniumManager), LogEventLevel.Info);
View full example on GitHub

Ruby’s logger allows you to opt in (“allow”) or opt out (“ignore”) of log messages based on their IDs. Everything that Selenium logs includes an ID. You can also turn on or off all deprecation notices by using :deprecations.

These methods accept one or more symbols or an array of symbols:

    logger.ignore(:jwp_caps, :logger_info)
View full example on GitHub

or

    logger.allow(%i[selenium_manager example_id])
View full example on GitHub

3 - Como atualizar para Selenium 4

Interessado no Selenium 4? Veja este guia para realizar o upgrade para a ultima versão!

Atualizar para o Selenium 4 deve ser um processo sem dificuldades se você estiver usando uma das linguagens oficialmente suportadas (Ruby, JavaScript, C#, Python, and Java). Pode haver alguns casos em que alguns problemas podem acontecer, este guia irá ajudar você a resolvê-los. Vamos passar as etapas para atualizar as dependências do seu projeto e entender as depreciações e também as mudanças trazidas pela versão atualizada.

Estas são as etapas que seguiremos para atualizar para o Selenium 4:

  • Preparando nosso código de teste
  • Atualizando as dependências
  • Possíveis erros e mensagens de suspensão de uso

Nota: enquanto as versões do Selenium 3.x estavam sendo desenvolvidas, foi implementado o suporte padrão para W3C WebDriver. Este novo protocolo e o legado JSON Wire Protocol foram suportados. Através da versão 3.11, o código do Selenium passou a ser compátivel com o nível 1 da especificação W3C. A compatibilidade do código W3C na ultima versão do Selenium 3 irá funcionar como esperado na versão 4.

Preparando nosso código de teste

Selenium 4 remove suporte para protocolos legados e usa o W3C Webdriver por padrão. Para a maioria das coisas, essa implementação não irá afetar usuários finais. As maiores exeções são Capabilities e a classe Actions.

Recursos

Se os recursos de teste não forem estruturados para serem compatíveis com W3C, pode fazer com que uma sessão não seja iniciada. Aqui está a lista de recursos padrão do W3C WebDriver:

  • browserName
  • browserVersion (replaces version)
  • platformName (replaces platform)
  • acceptInsecureCerts
  • pageLoadStrategy
  • proxy
  • timeouts
  • unhandledPromptBehavior

Uma lista atualizada de recursos padrão pode ser encontrada aqui: W3C WebDriver.

Qualquer recurso que não esteja incluido na lista acima, precisa ser incluido um prefixo de fornecedor. Isso se aplica aos recursos específicos do navegador, bem como aos recursos específicos do fornecedor da nuvem. Por exemplo, se o seu fornecedor de nuvem usa os recursos build e name para seus testes, você precisa envolvê-los em um bloco cloud: options (verifique com seu fornecedor de nuvem o prefixo apropriado).

Antes

Move Code

DesiredCapabilities caps = DesiredCapabilities.firefox();
caps.setCapability("platform", "Windows 10");
caps.setCapability("version", "92");
caps.setCapability("build", myTestBuild);
caps.setCapability("name", myTestName);
WebDriver driver = new RemoteWebDriver(new URL(cloudUrl), caps);

caps = {};
caps['browserName'] = 'Firefox';
caps['platform'] = 'Windows 10';
caps['version'] = '92';
caps['build'] = myTestBuild;
caps['name'] = myTestName;

DesiredCapabilities caps = new DesiredCapabilities();
caps.SetCapability("browserName", "firefox");
caps.SetCapability("platform", "Windows 10");
caps.SetCapability("version", "92");
caps.SetCapability("build", myTestBuild);
caps.SetCapability("name", myTestName);
var driver = new RemoteWebDriver(new Uri(CloudURL), caps);

      caps = Selenium::WebDriver::Remote::Capabilities.firefox
      caps[:platform] = 'Windows 10'
      caps[:version] = '92'
      caps[:build] = my_test_build
      caps[:name] = my_test_name
      driver = Selenium::WebDriver.for :remote, url: cloud_url, desired_capabilities: caps
      driver.get(url)
      driver.quit
View full example on GitHub
caps = {}
caps['browserName'] = 'firefox'
caps['platform'] = 'Windows 10'
caps['version'] = '92'
caps['build'] = my_test_build
caps['name'] = my_test_name
driver = webdriver.Remote(cloud_url, desired_capabilities=caps)

Depois

Move Code

FirefoxOptions browserOptions = new FirefoxOptions();
browserOptions.setPlatformName("Windows 10");
browserOptions.setBrowserVersion("92");
Map<String, Object> cloudOptions = new HashMap<>();
cloudOptions.put("build", myTestBuild);
cloudOptions.put("name", myTestName);
browserOptions.setCapability("cloud:options", cloudOptions);
WebDriver driver = new RemoteWebDriver(new URL(cloudUrl), browserOptions);

capabilities = {
  browserName: 'firefox',
  browserVersion: '92',
  platformName: 'Windows 10',
  'cloud:options': {
     build: myTestBuild,
     name: myTestName,
  }
}

var browserOptions = new FirefoxOptions();
browserOptions.PlatformName = "Windows 10";
browserOptions.BrowserVersion = "92";
var cloudOptions = new Dictionary<string, object>();
cloudOptions.Add("build", myTestBuild);
cloudOptions.Add("name", myTestName);
browserOptions.AddAdditionalOption("cloud:options", cloudOptions);
var driver = new RemoteWebDriver(new Uri(CloudURL), browserOptions);

      options = Selenium::WebDriver::Options.firefox
      options.platform_name = 'Windows 10'
      options.browser_version = 'latest'
      cloud_options = {}
      cloud_options[:build] = my_test_build
      cloud_options[:name] = my_test_name
      options.add_option('cloud:options', cloud_options)
      driver = Selenium::WebDriver.for :remote, capabilities: options
      driver.get(url)
      driver.quit
View full example on GitHub
from selenium.webdriver.firefox.options import Options as FirefoxOptions
options = FirefoxOptions()
options.browser_version = '92'
options.platform_name = 'Windows 10'
cloud_options = {}
cloud_options['build'] = my_test_build
cloud_options['name'] = my_test_name
options.set_capability('cloud:options', cloud_options)
driver = webdriver.Remote(cloud_url, options=options)

Utilitário para encontrar elemento (s) no Java

O utilitário para localizar elementos no Java (interfaces FindsBy) foram removidos visto que se destinavam apenas a uso interno. Os exemplos de código a seguir explicam isso melhor.

Encontrando um único elemento com findElement*

Antes

driver.findElementByClassName("className");
driver.findElementByCssSelector(".className");
driver.findElementById("elementId");
driver.findElementByLinkText("linkText");
driver.findElementByName("elementName");
driver.findElementByPartialLinkText("partialText");
driver.findElementByTagName("elementTagName");
driver.findElementByXPath("xPath");
Depois

driver.findElement(By.className("className"));
driver.findElement(By.cssSelector(".className"));
driver.findElement(By.id("elementId"));
driver.findElement(By.linkText("linkText"));
driver.findElement(By.name("elementName"));
driver.findElement(By.partialLinkText("partialText"));
driver.findElement(By.tagName("elementTagName"));
driver.findElement(By.xpath("xPath"));

Encontrando multiplos elementos com findElements*

Antes

driver.findElementsByClassName("className");
driver.findElementsByCssSelector(".className");
driver.findElementsById("elementId");
driver.findElementsByLinkText("linkText");
driver.findElementsByName("elementName");
driver.findElementsByPartialLinkText("partialText");
driver.findElementsByTagName("elementTagName");
driver.findElementsByXPath("xPath");
Depois

driver.findElements(By.className("className"));
driver.findElements(By.cssSelector(".className"));
driver.findElements(By.id("elementId"));
driver.findElements(By.linkText("linkText"));
driver.findElements(By.name("elementName"));
driver.findElements(By.partialLinkText("partialText"));
driver.findElements(By.tagName("elementTagName"));
driver.findElements(By.xpath("xPath"));

Atualizando as dependências

Verifique as subseções abaixo para isntalar o Selenium 4 e atualizar as dependências do seu projeto

Java

O processo de atualização do Selenium depende de qual ferramenta de compilação está sendo usada. Vamos mostrar as mais comuns para Java, como Maven e Gradle. A versão minínma do Java ainda é 8.

Maven

Antes

<dependencies>
  <!-- more dependencies ... -->
  <dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-java</artifactId>
    <version>3.141.59</version>
  </dependency>
  <!-- more dependencies ... -->
</dependencies>
Depois

<dependencies>
    <!-- more dependencies ... -->
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-java</artifactId>
        <version>4.4.0</version>
    </dependency>
    <!-- more dependencies ... -->
</dependencies>
Após realizar a mudança, você pode executar mvn clean compile no mesmo diretório, onde o arquivo pom.xml está.

Gradle

Antes

plugins {
    id 'java'
}
group 'org.example'
version '1.0-SNAPSHOT'
repositories {
    mavenCentral()
}
dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.0'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.0'
    implementation group: 'org.seleniumhq.selenium', name: 'selenium-java', version: '3.141.59'
}
test {
    useJUnitPlatform()
}
Depois

plugins {
    id 'java'
}
group 'org.example'
version '1.0-SNAPSHOT'
repositories {
    mavenCentral()
}
dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.0'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.0'
    implementation group: 'org.seleniumhq.selenium', name: 'selenium-java', version: '4.4.0'
}
test {
    useJUnitPlatform()
}

Após realizar a mudança, você pode executar ./gradlew clean build no mesmo diretório onde o arquivo build.gradleestá.

Para verifica todas as versões do Java, você pode ir até MVNRepository.

C#

O local para obter atualizações para Selenium 4 em C# é NuGet Dentro do pacaote Selenium.WebDriver você pode seguir as instruções para atualizar para ultima versão. Dentro do Visual Studio, através do NuGet Package Manager você pode executar:

PM> Install-Package Selenium.WebDriver -Version 4.4.0

Python

A mudança mais importante para usar o Python é a versão minima requerida. Para Selenium 4 a versão miníma requerida será Python3.7 ou superior. Mais detalhes podem ser encontrados aqui:Python Package Index. Para atualizar através da linha de comando, você pode executar:

pip install selenium==4.4.3

Ruby

Detalhes para atualizar para o Selenium 4 podem ser vistos aqui: selenium-webdriver gem in RubyGems Para instalar a ultima versão, você pode executar:

gem install selenium-webdriver

Para adicioná-lo ao seu Gemfile:

gem 'selenium-webdriver', '~> 4.4.0'

JavaScript

O pacote selenium-webdriver pode ser encontrado pelo Node package manager, npmjs. Selenium 4 pode ser encontrado aqui. Para instalar, você pode executar:

npm install selenium-webdriver

Ou, atualize o seu package.json e execute npm install:

{
  "name": "selenium-tests",
  "version": "1.0.0",
  "dependencies": {
    "selenium-webdriver": "^4.4.0"
  }
}

Possíveis erros e mensagens de descontinuação

Aqui temos um conjunto de exemplos de código que o ajudarão a superar as mensagens de descontinuação, que você pode encontrar após atualizar para o Selenium 4.

Java

Waits e Timeout

Os parametros que eram esperados de ser recebidos em um Timeout trocaram de (long time, TimeUnit unit) para o (Duration duration).

Antes

driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.manage().timeouts().setScriptTimeout(2, TimeUnit.MINUTES);
driver.manage().timeouts().pageLoadTimeout(10, TimeUnit.SECONDS);
Depois

driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10));
driver.manage().timeouts().scriptTimeout(Duration.ofMinutes(2));
driver.manage().timeouts().pageLoadTimeout(Duration.ofSeconds(10));
As esperas(waits) também esperam parâmetros diferentes agora. O WebDriverWait agora espera uma Duration em vez de um tempo limite long em segundos e milissegundos. Os métodos utilitários withTimeout e pollingEvery do FluentWait passaram do (long time, TimeUnit unit) para o (Duration duration).

Antes

new WebDriverWait(driver, 3)
.until(ExpectedConditions.elementToBeClickable(By.cssSelector("#id")));

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

new WebDriverWait(driver, Duration.ofSeconds(3))
  .until(ExpectedConditions.elementToBeClickable(By.cssSelector("#id")));

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

A fusão de recursos não estã mais alterando o objeto de invocação

Antes era possível fundir um conjunto diferente de recursos em outro counjunto, e isso alterava o objeto de chamada. Agora, o resultado da operação de fusão precisa ser atribuído.

Antes

MutableCapabilities capabilities = new MutableCapabilities();
capabilities.setCapability("platformVersion", "Windows 10");
FirefoxOptions options = new FirefoxOptions();
options.setHeadless(true);
options.merge(capabilities);

//Como resultado, o objeto `options` estava sendo modificado.
Depois

MutableCapabilities capabilities = new MutableCapabilities();
capabilities.setCapability("platformVersion", "Windows 10");
FirefoxOptions options = new FirefoxOptions();
options.setHeadless(true);
options = options.merge(capabilities);

// O resultado da chamada `merge`  precisa ser atribuído a um objeto.

Firefox Legacy

Antes do GeckoDriver existir, o projeto Selenium tinha uma implementação de driver para automatizar o Firefox(versão<48). Entretanto, esta implementação não é mais necessária, pois não funciona nas versões mais recentes do Firefox. Para evitar graves problemas ao atualizar para o Selenium 4, a opção setLegacy será mostrada como obsoleta. A recomendação é parar de utilizar a implementação antiga e depender apenas do GeckoDriver. O código a seguir mostrará a linha setLegacy obsoleta após atualizar.

FirefoxOptions options = new FirefoxOptions();
options.setLegacy(true);

BrowserType

A interface BrowserType existe há um bom tempo, más ela está ficando obsoleta a favor da nova interface Browser.

Antes

MutableCapabilities capabilities = new MutableCapabilities();
capabilities.setCapability("browserVersion", "92");
capabilities.setCapability("browserName", BrowserType.FIREFOX);
Depois

MutableCapabilities capabilities = new MutableCapabilities();
capabilities.setCapability("browserVersion", "92");
capabilities.setCapability("browserName", Browser.FIREFOX);

C#

AddAdditionalCapability está descontinuada

Em vez dela, AddAdditionalOption é recomendada. Aqui está um exemplo mostrando isso:

Antes

var browserOptions = new ChromeOptions();
browserOptions.PlatformName = "Windows 10";
browserOptions.BrowserVersion = "latest";
var cloudOptions = new Dictionary<string, object>();
browserOptions.AddAdditionalCapability("cloud:options", cloudOptions, true);
Depois

var browserOptions = new ChromeOptions();
browserOptions.PlatformName = "Windows 10";
browserOptions.BrowserVersion = "latest";
var cloudOptions = new Dictionary<string, object>();
browserOptions.AddAdditionalOption("cloud:options", cloudOptions);

Python

executable_path foi descontinuada, por favor, passe um Service object

No Selenium 4, você precisara definir o executable_path a partir de um objeto Service para evitar avisos de depreciação. (Ou não defina o caminho e, em vez disso, certifique-se de que o driver que você precisa esteja no System PATH.)

Antes

from selenium import webdriver
options = webdriver.ChromeOptions()
driver = webdriver.Chrome(
    executable_path=CHROMEDRIVER_PATH, 
    options=options
)
Depois

from selenium import webdriver
from selenium.webdriver.chrome.service import Service as ChromeService
options = webdriver.ChromeOptions()
service = ChromeService(executable_path=CHROMEDRIVER_PATH)
driver = webdriver.Chrome(service=service, options=options)

Resumo

Passamos pelas principais mudanças a serem levadas em consideração ao atualizar para o Selenium 4. Cobrimos os diferentes aspectos a serem cobertos quando o código de teste é preparado para a atualização, incluindo sugestões sobre como evitar possíveis problemas que podem aparecer ao usar a nova versão do Selenium. Para finalizar, também abordamos um conjunto de possíveis problemas com os quais você pode se deparar depois da atualização e compartilhamos possíveis correções para esses problemas.

Este tópico foi originalmente postado no site https://saucelabs.com/resources/articles/how-to-upgrade-to-selenium-4