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.
It's easy to push services that don't validate, because much of the tooling, including the service test runner and the service definition generator, do not validate all the services. This leads to errors that manifest in CI. It would be more helpful to see these errors sooner.
This moves the `validateDefinition()` check to `loadServiceClasses()`, where the services are first loaded, and fixes related validation errors.
This is consistent with what we're pretty much already doing, and saves us from making the request during code review.
These were all autofixed and most of them seem easier to read. Some in the legacy services should be rewritten in more legible forms during refactor (ie using intermediate variables, or using request’s qs option). There are some in helper functions and elsewhere that should get rewritten separately. I don't want to change them in this PR because the changes will get lost in this diff, though we could identify them here and fix them before or just after.
