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.

jsdom と Mocha でテストされたコンポーネントから Plotly をインポートして失敗を再現し、その後 node_modules/plotly.js/dist/plotly.js の最初に未定義となるブラウザー関数の周辺を調査します。追加で不足している関数を追跡し、テストと互換性のある意図された動作を特定します。Plotly が現在のブラウザー関数エラーの連鎖なしにインポートできれば完了です。