Do you want to request a feature or report a bug?
I want to request a feature.
What is the current behavior?
Right now Jest does not support test suites with import statement. They result in the following error:

SyntaxError: Unexpected token import
      
      at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:305:17)
          at Generator.next (<anonymous>)
          at new Promise (<anonymous>)

What is the expected behavior?
Would be great if Jest supported ES modules natively.

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.
Jest: 21.2.1
node: 8.9.0
npm: 5.5.1

Before, native support of ES modules was not possible since node.js did not support them. Starting from a few versions ago, node.js added support of ES modules with a flag (https://nodejs.org/api/esm.html). It would be absolutely great if Jest would match this with adding support of ES modules too, probably with a flag or even without it.

Node.js requires ES modules to have an .mjs extension. In order to support ES modules Jest needs to add a recognition of those extensions. Jest will also need to pass an --experimental-modules flag to node.js until node will implement support of modules without a flag. I'm not sure if any other required changes would be needed within Jest in order to support this. I can only hope it will not be terribly hard.

Ideally, it would be cool if Jest would recognize modules even in files without .mjs extensions since code that targets browsers do not use them, but I don't know if it is ever possible. Node.js provides loader hooks for that (https://nodejs.org/api/esm.html) but this still doesn't solve the issue with a reliable determination of what type of module the file is.

I believe ES modules are a great feature vastly superior to all existing JS module solutions. Having it implemented in node.js opens a door for Jest to have it too. This would allow developers stick to using the first truly standardized JS module format not only throughout development, but trough testing as well.