I no longer use this module, and I will not maintain it.
Feel free to fork it if you want to maintain it yourself.
TypeScript allows importing other TypeScript files with a .js extension, for
compatibility with the ES6 modules loader specification. Unfortunately, Jest
gets confused by this and complains that it's not able to find the JavaScript
file.
This is a resolver that catches that error, and then tries to resolve it again
but with a .ts / .tsx extension.
Install this module into your project using npm:
npm install -D jest-ts-tsx-resolver
Then add it to your Jest config file as the resolver:
"resolver": "jest-ts-tsx-resolver"