Cannot run jsdom unit tests for files that import Plotly due to missing browser functions

We are using Plotly in our react application and are currently experiencing issues while unit testing components that import the Plotly library either directly, or further down the component tree.

Currently we are using the latest versions of jsdom and mocha to run our unit tests.

It appears the issue is in the Plotly node module, because our unit test suite breaks due to undefined functions in node_modules/plotly.js/dist/plotly.js

For example we get:

ReferenceError: getComputedStyle is not defined

We have attempted to stub that function (as mentioned in the closed issue #1675), but more undefined functions arise and it becomes a bit of a rabbit hole trying to stub all of the missing functions.

Reproduisez l’échec en important Plotly depuis un composant testé avec jsdom et Mocha, puis inspectez node_modules/plotly.js/dist/plotly.js autour de la première fonction du navigateur indéfinie. Suivez les fonctions supplémentaires manquantes et déterminez le comportement prévu compatible avec les tests ; le travail est terminé lorsque Plotly s’importe sans la cascade actuelle d’erreurs de fonctions du navigateur.