@infragen/generator-add-jest

1. should run yarn add --dev jest

2. should add scripts to watch and start tests in package.json

   {
      "scripts": {
        "test": "jest --config jest.config.json",
        "test:watch": "yarn test --watch",
        "test:debug": "DEBUG=* yarn test --verbose",
        "test:watch:debug": "yarn test:debug --watch",
        "test:integration": "USE_REAL_API=true yarn test",
        "test:integration:watch": "yarn test:integration --watch",
        "test:integration:debug": "DEBUG=* yarn run test:integration --verbose",
        "test:integration:debug:watch": "yarn run test:integration:debug --watch",
      }
   };
   

3. should create a jest.config.json file

   {
     "testEnvironment": "node",
   };
   

4. should run yarn add --dev @types/jest ts-jest if we are using TS

5. should add transform to the jest.config.json file if we are using TS

   {
     "testEnvironment": "node",
     "transform": {
       "^.+\\.tsx?$": "ts-jest"
     }
   }
   

6. if in lerna monorepo root add to jest.config.json

   {
     "watchPlugins": ["jest-watch-lerna-packages"]
   }
   

7. run

   yarn add --dev jest-watch-lerna-packages