Instalación.
typescript https://www.typescriptlang.org/
Jest Runner https://marketplace.visualstudio.com/items?itemName=firsttris.vscode-jest-runner
vscode-icons https://marketplace.visualstudio.com/items?itemName=vscode-icons-team.vscode-icons
ts-jest https://github.com/kulshekhar/ts-jest
Línea de comandos.
npm install --save-dev jest
npm i @types/jest
Prerequisites npm i -D jest typescript
Installing npm i -D ts-jest @types/jest
Creating config npx ts-jest config:init
Running tests npx jest