Adds missing test to CJK issue

[HarelM]

Adds missing test to #1002

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Write tests for all new functionality.

It's not ideal as the image is saved in base64 format and is compared exactly, but I didn't want to complicate the test to use PNG and pixelmatch libraries...

[github-actions]

Bundle size report:

Size Change: 0 B
Total Size Before: 194 kB
Total Size After: 194 kB

Output file	Before	After	Change
maplibre-gl.js	185 kB	185 kB	0 B
maplibre-gl.css	9.25 kB	9.25 kB	0 B

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[HarelM]

This is failing as the generated image is the following:

Need to understand why this is not working in CI :-/

[wipfli]

Looks good to me. Thanks!

[wipfli]

Haha, running the browser tests locally now looks like this:

[HarelM]

I know :-) but at least you can use the received text, save it to a html file and see how it looks in the browser.
These were my intentions, although not very user friendly, but a lot less complicated than render tests...

[birkskyum]

How come the CI passes when this test fails? Is it because it only fails when we run it locally?

[wipfli]

I think so, yes. If I remember correctly, @HarelM chose to use base64 image encoding such that one can easily copy-paste the CI actual result to the expected result in version control...

[HarelM]

There are probably better ways to do it, but I wanted to have a CJK test in the CI as it's not possible to do it in the render tests.
Yes, it fails locally unfortunately.
A better way would've been to use pixelMatch like in the render tests I guess, but I didn't want to over complicate the browser test... Feel free to refactor this...