This is a small VS Code extension that helps with managing Typst's test suite. When installed, a new Code Lens appears in all .typ files in the tests folder. It provides the following actions:

View: Opens the output and reference image of a test to the side.
Run: Runs the test and shows the results to the side.
Terminal: Runs the test in the integrated terminal.

In the side panel, there are a few menu actions at the top right:

Refresh: Reloads the panel to reflect changes to the images
Run: Runs the test and shows the results
Save: Runs the test with --update to save the reference image

Installation

First, you need to build the extension:

npm i
npm run build

Then, you can easily install and (and keep it up-to-date) via VS Code's UI:

Go to View > Command Palette or press Cmd/Ctrl+P,
In the drop down list, pick command "Developer: Install extension from location",
Select this test-helper directory in the file explorer dialogue box. VS Code will add the extension's path to ~/.vscode/extensions/extensions.json.