refs: https://github.com/TryGhost/Toolbox/issues/595
We're rolling out new rules around the node assert library, the first of which is enforcing the use of assert/strict. This means we don't need to use the strict version of methods, as the standard version will work that way by default.
This caught some gotchas in our existing usage of assert where the lack of strict mode had unexpected results:
- Url matching needs to be done on `url.href` see aa58b354a4
- Null and undefined are not the same thing, there were a few cases of this being confused
- Particularly questionable changes in [PostExporter tests](c1a468744b) tracked [here](https://github.com/TryGhost/Team/issues/3505).
- A typo see eaac9c293a
Moving forward, using assert strict should help us to catch unexpected behaviour, particularly around nulls and undefineds during implementation.
refs https://github.com/TryGhost/Toolbox/issues/292
- With the package being out of TryGhost/Ghost codebase the paths have changed and needed to introdude a concept of "fixtures" for the package to be able to funciton independently
refs https://github.com/TryGhost/Toolbox/issues/292
- There's a need to reuse these utils in the version mismatch notification service. Having loads of tightly coupled dependencies makes it super hard to rip out this module for reuse
- It's a groundwork for extraction of the email-utils package
- Rewrote the unit tests that were written for these utils previously - they weren't testing anything useful. The goal of this util is to generate specific content based on provided data and available templates - now the tests do test those specific things, not the mailer itself!
- this is a small part of a bit of cleanup of our test files
- the goal is to make the existing tests clearer with a view to making it easier to write more tests
- this makes the test structure follow the codebase structure more closely
- eventually we will colocate the tests as we break the codebase down further
