Revisit testing non-exported circuits

[andrew-fleming]

There doesn't seem to be a good way to test module-scoped circuits that are not exported. The two initial ideas are:

1. Rewrite the code in a testing module and export everything
2. Create a wrapper circuit with a very explicit name i.e. doNotUse_foo_forTesting

(see convo)

Neither of them are maintainable as patterns and they create a greater surface area for other issues to arise

When better tooling becomes available, testing non-exported circuits should be revisited