Capturing browser logs with Selenium WebDriver using Java

Question

Is there a way to capture browser logs while running automated test cases with Selenium  I found an article on how to capture JavaScript errors in Selenium  But that is just for Firefox and only for errors  I would like to get all the console logs

User · Answer

Driver manager logs can be used to get console logs from browser and it will help to identify errors appears in console             import org openqa selenium logging LogEntries     import org openqa selenium logging LogEntry       public List lt LogEntry gt  getBrowserConsoleLogs             LogEntries log  driver manage   logs   get  browser       List lt LogEntry gt  logs log getAll        return logs

User · Answer

Starting with Firefox 65 an about config flag exists now so console API calls like console log   land in the output stream and thus the log file  see  https   github com mozilla geckodriver issues 284 issuecomment-458305621    profile   new FirefoxProfile    profile setPreference  devtools console stdout content   true

User · Answer

Add cast RemoteWebDriver to driver initialize and you will have the  setLogLevel method   import java util logging Level  import org openqa selenium By  import org openqa selenium WebDriver  import org openqa selenium chrome ChromeDriver  import org openqa selenium remote RemoteWebDriver   public class PrintLogTest       public static void main String   args            System setProperty  webdriver chrome driver     Users     chromedriver            WebDriver driver   new ChromeDriver               here           RemoteWebDriver  driver  setLogLevel Level INFO            driver get  https   google com             driver findElement By name  q    sendKeys  automation test            driver quit              Example output   Jun 15  2020 4 27 04 PM org openqa selenium remote RemoteWebDriver log INFO  Executing  get  430aec21a9beb6340a4185c4ea6a693d  get  url https   google com    Jun 15  2020 4 27 06 PM org openqa selenium remote RemoteWebDriver log INFO  Executed   430aec21a9beb6340a4185c4ea6a693d  get  url https   google com    Jun 15  2020 4 27 06 PM org openqa selenium remote RemoteWebDriver log INFO  Executing  findElement  430aec21a9beb6340a4185c4ea6a693d  findElement  using name  value q   Jun 15  2020 4 27 06 PM org openqa selenium remote RemoteWebDriver log INFO  Executed   430aec21a9beb6340a4185c4ea6a693d  findElement  using name  value q             At least I ve tried it on ChromeDriver   and FirefoxDriver   and it working fine

User · Answer

I assume it is something in the lines of   import org openqa selenium WebDriver  import org openqa selenium chrome ChromeDriver  import org openqa selenium logging LogEntries  import org openqa selenium logging LogEntry  import org openqa selenium logging LogType  import org openqa selenium logging LoggingPreferences  import org openqa selenium remote CapabilityType  import org openqa selenium remote DesiredCapabilities  import org testng annotations AfterMethod  import org testng annotations BeforeMethod  import org testng annotations Test   public class ChromeConsoleLogging       private WebDriver driver         BeforeMethod     public void setUp             System setProperty  webdriver chrome driver    c   path  to  chromedriver exe                    DesiredCapabilities caps   DesiredCapabilities chrome            LoggingPreferences logPrefs   new LoggingPreferences            logPrefs enable LogType BROWSER  Level ALL           caps setCapability CapabilityType LOGGING PREFS  logPrefs           driver   new ChromeDriver caps               AfterMethod     public void tearDown             driver quit               public void analyzeLog             LogEntries logEntries   driver manage   logs   get LogType BROWSER           for  LogEntry entry   logEntries                System out println new Date entry getTimestamp            entry getLevel           entry getMessage                   do something useful with the data                       Test     public void testMethod             driver get  http   mypage com              do something on page         analyzeLog              Source   Get chrome  39 s console log

User · Answer

As a non-java selenium user  here is the python equivalent to Margus s answer  from selenium import webdriver from selenium webdriver common desired capabilities import DesiredCapabilities      class ChromeConsoleLogging object        def   init   self             self driver   None      def setUp self             desired   DesiredCapabilities CHROME         desired   loggingPrefs        browser   ALL            self driver   webdriver Chrome desired capabilities desired       def analyzeLog self             data   self driver get log  browser           print data       def testMethod self             self setUp           self driver get  quot http   mypage com quot           self analyzeLog    Reference Edit  Keeping Python answer in this thread because it is very similar to the Java answer and this post is returned on a Google search for the similar Python question

User · Answer

In a more concise way  you can do  LogEntries logs   driver manage   logs   get LogType BROWSER    For me it worked wonderfully for catching JS errors in console  Then you can add some verification for its size  For example  if it is  gt  0  add some error output

User · Answer

A less elegant solution is taking the log  manually  from the user data dir    Set the user data dir to a fixed place   options   new ChromeOptions    capabilities   DesiredCapabilities chrome    options addArguments  user-data-dir  your path     capabilities setCapability ChromeOptions CAPABILITY  options    Get the text from the log file chrome debug log located in the path you ve entered above    I use this method since RemoteWebDriver had problems getting the console logs remotely  If you run your test locally that can be easy to retrieve

User · Answer

Before launching webdriver  we just set this environment variable to let chrome generate it   export CHROME LOG FILE   pwd  tests e2e2 logs client log

User · Answer

Adding LoggingPreferences to  goog loggingPrefs  properties with the Chrome Driver options can help to fetch the Browser console logs for all Log levels    ChromeOptions options   new ChromeOptions        LoggingPreferences logPrefs   new LoggingPreferences    logPrefs enable LogType BROWSER  Level ALL   options setCapability  goog loggingPrefs   logPrefs   WebDriver driver   new ChromeDriver options

[java] Capturing browser logs with Selenium WebDriver using Java

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