Cannot find name 'test'. Do you need to install type definitions for a test runner? Try `npm i @types/jest` or `npm i @types/mocha` · Issue #31226 · microsoft/TypeScript
TypeScript Version: 3.4.5 Code package.json dev dependencies: "devDependencies": { "@types/classnames": "^2.2.7", "@types/cookie": "^0.3.2", "@types/facebook-js-sdk": "^3.2.1", "@types/graphql": "^...
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