refs: https://github.com/TryGhost/Toolbox/issues/327
- lang / locale has had a lot of churn, but we decided this setting should always be locale
- session_secret is too generic as we have multiples of these
refs https://github.com/TryGhost/Toolbox/issues/292
- When version missmatch handling is done in Ghost we need to store the 'Accept-Version' header values that have been already processed in the past (to avoid sending notifications about the same mismatch multiple times)
- The `version_notifications` will be storing an array with handled versions like so: `['v3.44', 'v4.23', 'v4.39']`.
- The emailing logic and processing is slightly similar to how "notification" key is handled, that's why I've placed the definition of this new key close by.
- the setup() function returns a function that's expected to be called as a mocha hook
- wrapping this in a function means it doesn't get called properly
- therefore the db setup was never being called for this test
- e2e tests are tests that cover critical functionality by booting ghost
- integration tests are more like unit tests, but need to initialise and use a db
- so settings shouldn't start Ghost, url service is critical and should be in integration, and preview is critical and should be in e2e
- some tests are necessarily driven from the db
- these are like unit tests, except they only make sense if using the db - else you have to stub too much to make them worthwhile
- for these rare but important cases, we have the clear concept of integration tests
