- this file was mostly just missing tests for the other content disposition types, which are easily added - bumps coverage of this file to 100%
- these tests have moved from `core/` so the names are no longer relevant
refs https://github.com/TryGhost/Toolbox/issues/363 - this API framework is standalone and should be pulled out into a separate package so we can define its boundaries more clearly, and promote better testing of smaller parts