Added debug mode for testing with debuggers

README.md

@@ -266,6 +266,13 @@ console.log(datamodel.flatState); // {infura: {...}, contractExchangeRates: [...
 
 Run `yarn test` to run the tests once. To run tests on file changes, run `yarn test:watch`.
 
+To enable debugger [via Chrome DevTools](https://jestjs.io/docs/troubleshooting#tests-are-failing-and-you-dont-know-why):
+
+1.  run `yarn test:debug` (for Windows: `yarn test:debug:windows`)
+2.  navigate to `chrome://inspect`
+3.  click "Open Dedicated DevTools for Node". Keep the DevTools window open
+4.  stop/rerun the tests as needed
+
 Run `yarn lint` to run the linter, or run `yarn lint:fix` to run the linter and fix any automatically fixable issues.
 
 ### Linking During Development

package.json

@@ -32,6 +32,8 @@
     "prepack": "./scripts/prepack.sh",
     "setup": "yarn install",
     "test": "jest",
+    "test:debug": "node --inspect-brk node_modules/.bin/jest --runInBand",
+    "test:debug:windows": "node --inspect-brk ./node_modules/jest/bin/jest.js --runInBand",
     "test:watch": "jest --watch"
   },
   "dependencies": {