如何编写Jest transformIgnorePatterns [英] How to write Jest transformIgnorePatterns
问题描述
我很高兴
Jest encountered an unexpected token
This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.
By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".
Here's what you can do:
• To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
• If you need a custom transformation specify a "transform" option in your config.
• If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.
You'll find more details and examples of these config options in the docs:
https://jestjs.io/docs/en/configuration.html
Details:
C:\Code\SPFx\BCO\node_modules\@microsoft\sp-core-library\lib\index.js:11
export { default as _BrowserDetection } from './BrowserDetection';
^^^^^^
SyntaxError: Unexpected token export
19 | } from 'office-ui-fabric-react/lib/Utilities';
20 | import { IUserProvider } from "../UserProviders/IUserProvider";
> 21 | import {
| ^
22 | Environment,
23 | EnvironmentType
24 | } from '@microsoft/sp-core-library';
at ScriptTransformer._transformAndBuildScript (node_modules/jest/node_modules/jest-runtime/build/script_transformer.js:403:17)
at Object.<anonymous> (src/webparts/BCO/components/EmployeeSelector/EmployeeSelector.tsx:21:1)
at Object.<anonymous> (src/webparts/BCO/components/FieldMapping/FieldMapping.tsx:13:1)
并在config.json中尝试了这些transformIgnorePatterns表达式
And tried these transformIgnorePatterns expressions in config.json
"transformIgnorePatterns": [
"\\node_modules\\@microsoft\\sp-dialog",
"\\node_modules\\@microsoft\\sp-core-library",
"node_modules/(?!sp-core-library)",
"node_modules/(?!@microsoft/sp-core-library)"
],
,但没有一个起作用.我在Windows 10上运行此命令,所以也尝试了此格式
and none of them worked. I run this on Windows 10 so I tried also this format
推荐答案
实际上,打字稿似乎在JEST测试用例中进展不佳,所以我觉得JEST需要忽略那些文件或需要打包这些软件包转换为JEST可以理解的js代码,
Actually, it seems like typescript is not going well with JEST test cases, so what i feel like either JEST need to ignore those files or those packages need to be transpiled to js code which JEST can understand,
您可以尝试
"transformIgnorePatterns": [ "node_modules/(?!(@microsoft/sp-core-library))" ],
以及在tsconfig.json中
and in tsconfig.json
"allowJs": true,
有关更多详细信息,请查看此帖子
for more details please check this post
https://github.com/SharePoint/sp -dev-docs/issues/2325#issuecomment-446416878
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