Jest Modules Do Not Import Correctly - node.js

Question

Dealing with modules in Jest has been a nightmare.
Aside from all the other issues encountered, there is one I have yet to be able to work through.
It looks as certain imports are getting imported incorrectly.
Consider the following trivial example
import * as jp from 'jsonpath'
console.log('paths: ' + jp.paths)
when running my app code in the browser, this prints
paths: function(obj, string, count) {
assert.ok(obj instanceof Object, "obj needs to be an object");
assert.ok(string, "we need a path");
var results = this.nodes(obj, string, count)
.map(function(r) { return r.path });
return results;
}
when running the same code from a Jest test, I get:
console.log
paths: undefined
upon debugging the test and inspecting the jp object in the debugger, I see:
Needless to say this does not look correct. When running console.log(jp) from the browser, I see
It seems like Jest is screwing up the module prototype somehow.
My jest.config.js:
const esModules = ['quasar/lang', 'lodash-es'].join('|');
/* eslint-env node */
module.exports = {
globals: {
__DEV__: true,
// TODO: Remove if resolved natively https://github.com/vuejs/vue-jest/issues/175
'vue-jest': {
pug: { doctype: 'html' },
},
},
setupFilesAfterEnv: ['<rootDir>/test/jest/jest.setup.ts'],
// noStackTrace: true,
// bail: true,
// cache: false,
// verbose: true,
// watch: true,
collectCoverage: false,
coverageDirectory: '<rootDir>/test/jest/coverage',
collectCoverageFrom: [
'<rootDir>/src/**/*.vue',
'<rootDir>/src/**/*.js',
'<rootDir>/src/**/*.ts',
'<rootDir>/src/**/*.jsx',
'<rootDir>/src/**/*.tsx',
],
coveragePathIgnorePatterns: ['/node_modules/', '.d.ts$'],
coverageThreshold: {
global: {
// branches: 50,
// functions: 50,
// lines: 50,
// statements: 50
},
},
testMatch: [
// Matches tests in any subfolder of 'src' or into 'test/jest/__tests__'
// Matches all files with extension 'js', 'jsx', 'ts' and 'tsx'
'<rootDir>/test/jest/__tests__/**/*.(spec|test).+(ts|js)?(x)',
'<rootDir>/src/**/*.jest.(spec|test).+(ts|js)?(x)',
],
// Extension-less imports of components are resolved to .ts files by TS,
// grating correct type-checking in test files.
// Being 'vue' the first moduleFileExtension option, the very same imports
// will be resolved to .vue files by Jest, if both .vue and .ts files are
// in the same folder.
// This guarantee a great dev experience both for testing and type-checking.
// See https://github.com/vuejs/vue-jest/issues/188#issuecomment-620750728
moduleFileExtensions: ['vue', 'js', 'jsx', 'json', 'ts', 'tsx'],
moduleNameMapper: {
'^quasar$': 'quasar/dist/quasar.common.js',
'^~/(.*)$': '<rootDir>/$1',
'^src/(.*)$': '<rootDir>/src/$1',
'^app/(.*)$': '<rootDir>/$1',
'^components/(.*)$': '<rootDir>/src/components/$1',
'^layouts/(.*)$': '<rootDir>/src/layouts/$1',
'^pages/(.*)$': '<rootDir>/src/pages/$1',
'^assets/(.*)$': '<rootDir>/src/assets/$1',
'^boot/(.*)$': '<rootDir>/src/boot/$1',
'.*css$': '#quasar/quasar-app-extension-testing-unit-jest/stub.css',
},
transform: {
// See https://jestjs.io/docs/en/configuration.html#transformignorepatterns-array-string
[`^(${esModules}).+\\.js$`]: 'babel-jest',
'^.+\\.(ts|js|html)$': 'ts-jest',
// vue-jest uses find-babel-file, which searches by this order:
// (async) .babelrc, .babelrc.js, package.json, babel.config.js
// (sync) .babelrc, .babelrc.js, babel.config.js, package.json
// https://github.com/tleunen/find-babel-config/issues/33
'.*\\.vue$': 'vue-jest',
'.+\\.(css|styl|less|sass|scss|svg|png|jpg|ttf|woff|woff2)$':
'jest-transform-stub',
},
transformIgnorePatterns: [`node_modules/(?!(${esModules}))`],
snapshotSerializers: ['<rootDir>/node_modules/jest-serializer-vue'],
testEnvironment: 'jsdom'
};
Any suggestions on how to resolve this?
Thank you.