I have been building a typescript based app which uses a few reusable web components written in javascript.

Something like this:

test.ts

import { jsModule } from 'components/module.js';
...

So, now while writing unit tests, karma-typescript doesn't understand the javascript imports and throw me this error without executing the tests.

ERROR [transformer.karma-typescript]: components/module.js: Unexpected token (44:35)
Transform function:
...

What could be an elegant way to write tests for a typescript file having javascript imports, does anyone know what should karma config hold to execute tests in a scenario like this?