在本地运行jest测试时，尝试通过ThemeProvider加载组件时测试套件失败。
很遗憾，我无法在回购中重现该问题。 我试图在沙盒中重现相同的行为，但该行为不重现。 在此处查看示例：https://codesandbox.io/s/fervent-nightingale-e7gg2?fontsize=14&hidenavigation=1&theme=dark
我正在使用react-inl和@mui，并且在测试环境中它只是无法编译。抱怨_capitalize.default不是一个函数，但是我检查了node_modules，显然该函数已导出。试图重新安装软件包，只是为了确保文件没有损坏。
在尝试 安装 虚拟dom中的元素以运行某些单元测试时，似乎发生了错误。使用浅层渲染的快照测试效果很好。
**错误转储**TypeError: (0 , _capitalize.default) is not a function
at InputBase (/home/circleci/project/node_modules/@material-ui/core/InputBase/InputBase.js:453:96)
at renderWithHooks (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:15108:18)
at updateForwardRef (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:16746:20)
at beginWork$1 (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:18522:16)
at HTMLUnknownElement.callCallback (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:347:14)
at invokeEventListeners (/home/circleci/project/node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:193:27)
at HTMLUnknownElementImpl._dispatch (/home/circleci/project/node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:119:9)
at HTMLUnknownElementImpl.dispatchEvent (/home/circleci/project/node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:82:17)
at HTMLUnknownElementImpl.dispatchEvent (/home/circleci/project/node_modules/jsdom/lib/jsdom/living/nodes/HTMLElement-impl.js:30:27)
at HTMLUnknownElement.dispatchEvent (/home/circleci/project/node_modules/jsdom/lib/jsdom/living/generated/EventTarget.js:157:21)
at Object.invokeGuardedCallbackDev (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:397:16)
at invokeGuardedCallback (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:454:31)
at beginWork$$1 (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:23217:7)
at performUnitOfWork (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:22211:12)
at workLoopSync (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:22185:22)
at renderRoot (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:21878:11)
at scheduleUpdateOnFiber (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:21419:22)
at scheduleRootUpdate (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:24319:3)
at updateContainerAtExpirationTime (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:24347:10)
at updateContainer (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:24436:10)
at /home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:24963:7
at unbatchedUpdates (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:21687:12)
at legacyRenderSubtreeIntoContainer (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:24962:5)
at Object.render (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:25042:12)
at fn (/home/circleci/project/node_modules/enzyme-adapter-react-16/src/ReactSixteenAdapter.js:437:26)
at /home/circleci/project/node_modules/enzyme-adapter-react-16/src/ReactSixteenAdapter.js:354:37
at batchedUpdates$1 (/home/circleci/project/node_modules/react-dom/cjs/react-dom.development.js:21643:12)
at act (/home/circleci/project/node_modules/react-dom/cjs/react-dom-test-utils.development.js:1002:14)
at Object.act (/home/circleci/project/node_modules/react-dom/cjs/react-dom-test-utils.development.js:1418:12)
at wrapAct (/home/circleci/project/node_modules/enzyme-adapter-react-16/src/ReactSixteenAdapter.js:354:13)
at Object.render (/home/circleci/project/node_modules/enzyme-adapter-react-16/src/ReactSixteenAdapter.js:423:16)
at new ReactWrapper (/home/circleci/project/node_modules/enzyme/src/ReactWrapper.js:115:16)
at mount (/home/circleci/project/node_modules/enzyme/src/mount.js:10:10)
at mountWithIntl (/home/circleci/project/test/intlHelper.js:22:10)
at Suite.<anonymous> (/home/circleci/project/src/app/components/statisticsFilter.test.js:52:23)
at addSpecsToSuite (/home/circleci/project/node_modules/jest-jasmine2/build/jasmine/Env.js:339:25)
at Env.describe (/home/circleci/project/node_modules/jest-jasmine2/build/jasmine/Env.js:308:7)
at describe (/home/circleci/project/node_modules/jest-jasmine2/build/jasmine/jasmine_light.js:99:18)
at Object.<anonymous> (/home/circleci/project/src/app/components/statisticsFilter.test.js:26:1)
at Runtime._execModule (/home/circleci/project/node_modules/jest-runtime/build/index.js:694:13)
at Runtime.requireModule (/home/circleci/project/node_modules/jest-runtime/build/index.js:376:14)
at /home/circleci/project/node_modules/jest-jasmine2/build/index.js:129:13
at Generator.next (<anonymous>)
at step (/home/circleci/project/node_modules/jest-jasmine2/build/index.js:170:30)
at /home/circleci/project/node_modules/jest-jasmine2/build/index.js:189:14
at new Promise (<anonymous>)
at /home/circleci/project/node_modules/jest-jasmine2/build/index.js:167:12
at jasmine2 (/home/circleci/project/node_modules/jest-jasmine2/build/index.js:138:17)
at /home/circleci/project/node_modules/jest-runner/build/run_test.js:187:24
at Generator.next (<anonymous>)
at step (/home/circleci/project/node_modules/jest-runner/build/run_test.js:315:30)
at /home/circleci/project/node_modules/jest-runner/build/run_test.js:326:15
at process._tickCallback (internal/process/next_tick.js:68:7)
尝试在本地运行测试，并且在尝试挂载东西时会中断。
反应：16.9.0
流量：0.2.2.3
流式：2.5.1
材质UI核心：4.11.0
材质UI图标：4.9.1
材质UI选择器：3.2.10
材质UI实验室：4.0.0-alpha.56