This test was provided by open-source contributors on Bugzilla. Currently, the "Browser rendering" results are not expected to match the "Correct output sample" results. In fact, I do not entirely agree with all of the given test cases in terms of their expected results, nor do I think that the browser should yet be expected to match all of the cases in the different languages, but I am (at least temporarily) adding the test anyway.

Input source
genericlip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin­lip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin­lip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin
cyŵyl
elγεωγραφικά‐συσχετισμένες ήτα
en'cept nut'in safari’s ‘sure’ naïve résumé—háček full‐time one-to-one
"newcastle‑upon‑tyne" washington‑on‑the‑brazos
earthquake earthworm cheeseburger [house] ~six -big-
es¡jalapeño!
frquelqu'un l’amour t'appelles‑tu 3eme
hu11-ei london‑ban
nl's ochtends
plwzięła bieżące
ruнью-йорк 1990-х 14-vii-1789
tlhtlhIngan Hol wa''uy' loghqam
Correct output sample
genericLip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin­lip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin­lip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin
cyŴyl
elΓεωγραφικά‐Συσχετισμένες Ήτα
en'Cept Nut'in Safari’s ‘Sure’ Naïve Résumé—Háček Full‐time One-to-One
"Newcastle-upon-Tyne" Washington‑on‑the‑Brazos
Earthquake Earthworm Cheeseburger [House] ~Six -Big-
es¡Jalapeño!
frQuelqu'un l’Amour t'Appelles‑Tu 3eme
hu11-ei London‑ban
nl's Ochtends
plWzięła Bieżące
ruНью-Йорк 1990-х 14-vii-1789
tlhtlhIngan Hol wa''uy' loghqam
Browser rendering
genericlip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin­lip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin­lip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin
cyŵyl
elγεωγραφικά‐συσχετισμένες ήτα
en'cept nut'in safari’s ‘sure’ naïve résumé—háček full‐time one-to-one
"newcastle‑upon‑tyne" washington‑on‑the‑brazos
earthquake earthworm cheeseburger [house] ~six -big-
es¡jalapeño!
frquelqu'un l’amour t'appelles‑tu 3eme
hu11-ei london‑ban
nl's ochtends
plwzięła bieżące
ruнью-йорк 1990-х 14-vii-1789
tlhtlhIngan Hol wa''uy' loghqam