espower | Power Assert feature instrumentor based on the ECMAScript | Parser library

I'm trying to test cloud functions function. But, in testing(npm run test) I got this error.

Why did I get this error? how to fix it?

I want use Mocha, power-assert in my TypeScript project, when I use Chai, istanbul could generate Coverage HTML report, when I switch to power-assert, istanbul could only report coverage but cant generate HTML report with same config and exit with error. And if there is an error in test, the mocha will also broke. It sames a path issue in power-assert. I use nyc to report the coverage.

My test command:

I'm using a babel plugin to load environment variables from a .env file into a React Native project, but changes to the .env file are not loaded until the javascript file importing them changes. I'd like a way to tell the react-native packager to recompile in the event that this file changes. I would accept an answer that:

1. Simply re-transpiles the entire project when a specific file (.env) changes.
2. Re-transpiles only those files containing a specific string, say foo

Is there a simple way to do this by writing a plugin/middleware? Maybe a separate background script that fires events to watchman that the react-native packager is listening for?

[EDIT in reply to a comment]

My current .babelrc is the following, where babel-plugin-react-native-config is a plugin I wrote to do hot variable swapping in conjunction with the react-native-config package.