Repo to illustrate Jest issue with ES6 class imports.
To repro, clone, yarn, yarn test.
File ./src/es6-classes/demo/sound-player-consumer-factory-mock.test.js fails due to the issue.
File ./src/es6-classes/demo/sound-player-consumer.test.js illustrates the workaround using mock.mockImplementation().
To see everything working correctly, switch to the mocks-working branch.