Скачать или смотреть How to Enable Performance Logging in RemoteWebDriver for Selenium Java

Discover how to solve the issue of enabling performance logging with RemoteWebDriver in Selenium Java by learning a simple fix for your code.
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This video is based on the question https://stackoverflow.com/q/70098690/ asked by the user 'Isvoran Andrei' ( https://stackoverflow.com/u/7474878/ ) and on the answer https://stackoverflow.com/a/70107945/ provided by the user 'Isvoran Andrei' ( https://stackoverflow.com/u/7474878/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Can't Enable Performance Level for RemoteWebDriver in Selenium Java?

When working with Selenium for web automation in Java, you might encounter challenges when trying to enable performance logging, especially when using RemoteWebDriver. This article explores a common issue faced by developers and provides a straightforward solution.

The Issue

While implementing performance logging, you have a well-structured code snippet, as shown below:

[[See Video to Reveal this Text or Code Snippet]]

However, upon executing the line to access the performance logs:

[[See Video to Reveal this Text or Code Snippet]]

You might run into the following error message:

[[See Video to Reveal this Text or Code Snippet]]

This can be particularly frustrating, especially when you notice that it works perfectly with ChromeDriver instead of RemoteWebDriver.

Understanding the Cause of the Problem

The error arises because the backend of RemoteWebDriver expects a different parameter for logging preferences regarding performance. While the LoggingPreferences class is correct, the way we specify these preferences can lead to the InvalidArgumentException.

The Solution

The key adjustment to remedy this issue is to change how you're specifying the logging preferences in your capabilities. Here’s a step-by-step breakdown of the fix:

Current Implementation:

[[See Video to Reveal this Text or Code Snippet]]

This line aims to set the logging preferences but does not effectively communicate with RemoteWebDriver.

Change to the Following:

[[See Video to Reveal this Text or Code Snippet]]

By using "goog:loggingPrefs" instead of CapabilityType.LOGGING_PREFS, you're directly aligning with the expected input for Google Chrome's RemoteWebDriver, which resolves the error.

Final Implementation

Your updated method should now look like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Now, when you attempt to access the performance logs using:

[[See Video to Reveal this Text or Code Snippet]]

It should work without any issues, allowing you to analyze performance logging as intended.

This small adjustment can make a significant difference, so it's important always to verify your capabilities when working with RemoteWebDriver. Happy coding, and may your Selenium tests be swift and error-free!