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.

通过从使用 jsdom 和 Mocha 测试的组件中导入 Plotly 来复现该失败，然后检查 node_modules/plotly.js/dist/plotly.js 中第一个未定义浏览器函数附近的代码。跟踪其他缺失的函数，并确定预期的、与测试兼容的行为；当 Plotly 导入时不再出现当前这一连串的浏览器函数错误，即表示完成。