Handle endpoint as callable on HALFor/UrlFor

[wo0dyn]

Rationale

The rationale behind this is the ability to refactor the name of an
endpoint without having to grep all HALFor/UrlFor to rename the
endpoint as strings too.

Example

from app.views import foo_endpoint

class FooResponse(HyperModel):
    links = LinkSet(
        {
             "self": HALFor(foo_endpoint)
        }
    )

If I use my IDE¹ to rename foo_endpoint() → bar_endpoint(), it will replace all occurrences of its reference in the codebase; without having to search for "foo_endpoint" string as well.

I don't know if that makes sense.

Note
Sorry about the refactoring on tests/app.py, but I didn't know any better way to expose a view in tests so I can test the change. Let me know if you have a better idea. 😊

Footnotes

1. I personally use PyCharm for instance. ↩

[jtc42]

I really like this! Thanks so much for taking the time to submit the PR. I'm on the road right now but I'll take a proper look in the next couple of days and hopefully get a release out this weekend.

[jtc42]

This has now been released in v0.5.0. Thanks again for the contribution!

[wo0dyn]

Thank you for the new release. 🙏🏼