問題描述：
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] unit: `jest --config test/unit/jest.conf.js --coverage`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] unit script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/v_ligaoyan/.npm/_logs/2020-04-29T06_21_19_561Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] test: `npm run unit`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] test script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/v_ligaoyan/.npm/_logs/2020-04-29T06_21_19_605Z-debug.log
這種問題感覺有點泛泛，網友們的方法：
1…/node_modules/jest/bin/jest.js --clearCach 或者 npm jest --clearCach
地址https://segmentfault.com/a/1190000019522911?utm_source=tag-newest
2.Clear down node_modules and remove package-lock.json. Re-run npm install.
Run npm cache verify and re-run npm install.
地址https://github.com/vuejs/vue-cli/issues/1879
我試了以上方法都不行，於是降低jest版本後解決：rm -rf node_modules 將json文件中的jest版本降低比如"^21.0.4”。然後重新安裝再運行。