Tests - Added tests for Image and SocialLink.

[mattburnett-repo]

Contributor checklist

• This pull request is on a separate branch and not the main branch
• I have run the tests for the backend and frontend depending on what's needed for my changes as described in the testing section of the contributing guide

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Description

This PR provides tests for the recently-added backend functionality of Image Upload and Social Media Links. There wasn't any test coverage for these two new items before now.

Frontend / Playwright tests need to be written; this should be done soon.

[github-actions]

Thank you for the pull request! ❤️

The activist team will do our best to address your contribution as soon as we can. If you're not already a member of our public Matrix community, please consider joining! We'd suggest using Element as your Matrix client, and definitely join the General and Development rooms once you're in. Also consider attending our bi-weekly Saturday developer syncs! It'd be great to meet you 😊

[github-actions]

Maintainer Checklist

The following is a checklist for maintainers to make sure this process goes as well as possible. Feel free to address the points below yourself in further commits if you realize that actions are needed :)

• The TypeScript, pytest and formatting workflows within the PR checks do not indicate new errors in the files changed

• The Playwright end to end and Zap penetration tests have been ran and are passing (if necessary)

• The changelog has been updated with a description of the changes for the upcoming release and the corresponding issue (if necessary)

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[andrewtavis]

Thanks for this, @mattburnett-repo! Let's shoot to get this in in the coming days or by end of sync on Saturday 😊

[andrewtavis]

Thanks for the great work, @mattburnett-repo, and also for the help reviewing, @cquinn540! 😊