Tests do not allow import statements

[staceyastewart]

It would be helpful for us to be able to use import statements within the tests, the same way we can in app/js/index.js for example.

[mnutt]

Background on this: right now tests are handled by karma, which invokes rollup to generate index.js and dist.js, but for tests it does not do any sort of bundling and instead just injects the test file, qunit.js, etc into its constructed tests page. I'm looking into maybe moving from karma to testem to hopefully get to use some of the ember stuff around building test files, too.