如何使用 Java 使用 Selenium WebDriver 捕获 JavaScript 错误

Question

我想知道是否有办法在运行自动化 Selenium 测试时捕获页面上的 JavaScript 错误。

Answer 1

There is logs Beta version in WebDriver

driver.manage().logs().get(LogType.BROWSER);

Will give you the console content.

Then you can filter it using Level

LogEntries entries = driver.manage().logs().get(LogType.BROWSER);
entries.filter(Level.SEVERE);

Answer 2

And there is one that worked for me. Here it is.

    public boolean isThereJSErrorOnThePage() {
    Set<String> errorStrings = new HashSet<>();
    errorStrings.add("SyntaxError");
    errorStrings.add("EvalError");
    errorStrings.add("ReferenceError");
    errorStrings.add("RangeError");
    errorStrings.add("TypeError");
    errorStrings.add("URIError");
    LogEntries logEntries = driver.manage().logs().get(LogType.BROWSER);
    for (LogEntry logEntry : logEntries) {
        for (String errorString : errorStrings) {
            if (logEntry.getMessage().contains(errorString)) {
                LOGGER.error("Java Script error has been detected:");
                LOGGER.error(new Date(logEntry.getTimestamp()) + " " + logEntry.getLevel() + " " + logEntry.getMessage());
                return true;
            }
        }
    }
    return false;
}

If it does not work out of a box, try to add capabilities:

DesiredCapabilities desiredCapabilities = DesiredCapabilities.chrome();
LoggingPreferences logPrefs = new LoggingPreferences();
logPrefs.enable(LogType.BROWSER, Level.ALL);
desiredCapabilities.setCapability(CapabilityType.LOGGING_PREFS, logPrefs);
driver = new ChromeDriver(desiredCapabilities);

Answer 3

您可以尝试https://github.com/AutomatedOwl/chromedriver-js-errors-collector它捕获所有 js 错误并将它们附加到诱惑报告。

Answer 4

Try the below code for capturing the javascript error of webPage and let me know if it has helped you

import java.util.List;
import java.util.concurrent.TimeUnit;
import net.jsourcerer.webdriver.jserrorcollector.JavaScriptError;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.firefox.FirefoxProfile;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

public class jsError {
 WebDriver driver;

 @BeforeTest
 public void setup() throws Exception {
  FirefoxProfile profile = new FirefoxProfile();
  JavaScriptError.addExtension(profile);
  driver = new FirefoxDriver(profile);
  driver.manage().window().maximize();
  driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
  driver.get("http://only-testing-blog.blogspot.com/2015/01/table-with-checkbox.html");
 }

 @Test
 public void printPageErrors() throws Exception {
  //Capture all errors and store them In array.
  List<JavaScriptError> Errors = JavaScriptError.readErrors(driver);
  System.out.println("Total No Of JavaScript Errors : " + Errors.size());
  //Print Javascript Errors one by one from array.
  for (int i = 0; i < Errors.size(); i++) {
   System.out.println("Error Message : "
     + Errors.get(i).getErrorMessage());
   System.out.println("Error Line No : "
     + Errors.get(i).getLineNumber());
   System.out.println(Errors.get(i).getSourceName());
   System.out.println();
  }
 }
}

Answer 5

import io.github.bonigarcia.wdm.WebDriverManager;
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;
import org.testng.asserts.SoftAssert;

import java.util.Date;
import java.util.logging.Level;

public class LoginTest {

    private WebDriver driver;

    @BeforeMethod
    public void setPreConditions() {
        WebDriverManager.chromedriver().setup();
        DesiredCapabilities capabilities = DesiredCapabilities.chrome();
        LoggingPreferences loggingPreferences = new LoggingPreferences();
        loggingPreferences.enable(LogType.BROWSER, Level.ALL);
        capabilities.setCapability(CapabilityType.LOGGING_PREFS, loggingPreferences);
        driver = new ChromeDriver(capabilities);

        driver.manage().window().maximize();
        driver.get("your_web_application_url");

        // Put a wait condition if needed.
    }

    @Test
    public void checkJavaScriptErrors() {
        checkJavaScriptErrorsAreNotAvailable(Level.SEVERE);
    }

    @AfterMethod
    public void quit() {
        driver.quit();
    }

    private void printJavaScriptErrors() {
        LogEntries logEntries = driver.manage().logs().get(LogType.BROWSER);
        for (LogEntry entry : logEntries) {
            System.out.println(new Date(entry.getTimestamp()) + " " + entry.getLevel() + " " + entry.getMessage());
        }
    }

    private void checkJavaScriptErrorsAreNotAvailable(Level level) {
        LogEntries logEntries = driver.manage().logs().get(LogType.BROWSER);
        SoftAssert softAssert = new SoftAssert();
        for (LogEntry entry : logEntries) {
            if (entry.getLevel().equals(level)) {
                softAssert.fail(new Date(entry.getTimestamp()) + " " + entry.getLevel() + " " + entry.getMessage());
            }
        }
        softAssert.assertAll();
    }
}

If you only need to print the JavaScript errors, you can use the method printJavaScriptErrors()

If you need to fail the test when there are JavaScript errors, you can use checkJavaScriptErrorsAreNotAvailable(Level level) .

Since the SoftAssert is used, it will show all the relevant level errors when the test is failed.