[js] Close CDP websocket connection on driver.quit

[pujagani]

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Description

When running the CDP tests against the Selenium Grid, the Node process does not stop because the CDP websocket connection is open. The Node process stops if the Selenium Grid is shut down and that causes the websocket connection to close. Ideally, we should be closing the websocket connection when we close the session.

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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PR Type

Bug fix

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Description

• Added logic to close the CDP websocket connection when driver.quit is called.
• Prevents the Node.js process from hanging by ensuring the websocket connection is closed, especially when running CDP sessions against Selenium Grid.

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Changes walkthrough 📝

	Relevant files
Bug fix	webdriver.js Ensure websocket connection is closed on driver quit          javascript/node/selenium-webdriver/lib/webdriver.js Added logic to close the websocket connection on driver.quit. Prevents node process from hanging when running CDP sessions against Selenium Grid. +8/-0

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[qodo-code-review]

PR Reviewer Guide 🔍

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Key issues to review Error Handling The new code doesn't include error handling for the websocket close operation, which could potentially throw an error and affect the quit process.

[qodo-code-review]

PR Code Suggestions ✨

Category	Suggestion	Score
Enhancement	Check if the WebSocket connection is open before closing it Consider adding a check to ensure that this._wsConnection is not only defined but also in an open state before attempting to close it. This can prevent potential errors if the connection is already closed. javascript/node/selenium-webdriver/lib/webdriver.js [792-794] -if (this._wsConnection !== undefined) { +if (this._wsConnection && this._wsConnection.readyState === WebSocket.OPEN) { this._wsConnection.close() } Apply this suggestion Suggestion importance[1-10]: 9 Why: This suggestion is highly relevant as it adds a check to ensure the WebSocket connection is open before attempting to close it, preventing potential errors if the connection is already closed.	9
Error handling	Add error handling when closing the WebSocket connection Consider adding error handling when closing the WebSocket connection to gracefully handle any potential errors during the closing process. javascript/node/selenium-webdriver/lib/webdriver.js [792-794] if (this._wsConnection !== undefined) { - this._wsConnection.close() + try { + this._wsConnection.close() + } catch (error) { + console.error('Error closing WebSocket connection:', error) + } } Apply this suggestion Suggestion importance[1-10]: 8 Why: Adding error handling is a good practice to gracefully manage any potential errors during the WebSocket closing process, enhancing the robustness of the code.	8
Maintainability	Add a comment explaining potential undefined state of WebSocket connection Consider adding a comment explaining why this._wsConnection might be undefined, to improve code maintainability and understanding for future developers. javascript/node/selenium-webdriver/lib/webdriver.js [792-794] +// The WebSocket connection might be undefined if CDP was not used or if the connection failed to establish if (this._wsConnection !== undefined) { this._wsConnection.close() } Apply this suggestion Suggestion importance[1-10]: 6 Why: While adding a comment can improve code maintainability and understanding, it is not as crucial as the other suggestions. It provides context for future developers, which is beneficial but not critical.	6