This removes `LONG_CACHE` and its descendants, which was a feature that added `?maxAge` to the live preview badges in the frontend. Since they are all static that is no longer needed, as the static badges all have longer cache timeouts regardless.
The route helper functions are fairly well isolated from the rest of BaseService, with a few convenient entry points. They are easier to test in isolation.
The way the code was written before, `pathToRegexp` was invoked once for every request, which seems inefficient.
`route` was validated when it was used, though it seems more helpful to validate it up front.
This breaks out `_makeFullUrl`, `_regex`, `_regexFromPath` into new helper functions `makeFullUrl`, `assertValidRoute`, `prepareRoute`, and `namedParamsForMatch`.
It adds validation to route, and updates the services without patterns to include one, in order to pass the new validation rules.
`base.js` is pretty long and `_makeBadgeData` is one of the most complex
functions in it.
It's a pure function so it's easy to test in isolation. This moves the function into its own module and reorganizes the tests in a way that makes it evaluate what it's doing, and easier to test what is and isn't covered.
Ref https://github.com/badges/shields/pull/2796#discussion_r249251008
