fix: support localePath with path input and customized routes

[Energon7]

 nuxtI18n: {
        paths: {
          en: '/about-us', 
          fr: '/a-propos',
          es: '/sobre'
      }
  }

Example:
Current locale is: fr.
Calling localePath('/about-us') --> returns /fr/a-propos;
or calling localePath('/en/about-us') --> returns /fr/a-propos;

tested when strategy is 'prefix_except_default'

[rchl]

It doesn't look too good at the first sight to be honest.

At minimum you need to run the tests when developing.

[Energon7]

You will need to update tests. since, now translated links are returned

[rchl]

Sorry but you need to make sure that your change and the tests are aligned. I'm sure you will find cases where your change is incorrect if you analyze the failing tests.

Also, localeRoute is supposed to return a route (or nothing) while with your change it sometimes returns a plain path. This is not in line with the API and is the first issue I see from a far perspective.

[Energon7]

Now check please, tests passed successfully.

[rchl]

They did not pass yet.

I'll check more thoroughly when I have more time but please continue with it.

(Also you have a lot of style issues that will be reported once the tests pass. You can see those locally by running yarn lint)

[rchl]

Also, I'd like a new test added that showcases a case that was previously failing but doesn't anymore with the fix.

[Energon7]

@rchl Your browser test is wrong. The error is related to this line: 75. localizedRoute.query = thisRoute.query.
If remove this line, all tests will pass successfully, but in this case, if you set the any query, it will be removed in translation.
For example:
setLocale('/about?page=1') --> /fr/a-propos

[rchl]

The test asserts that loading a /nopage?a#h path doesn't change it to something else. And with your fix the URL is changed to /nopage?a#h?a which is obviously wrong.

The test is not wrong, there is a bug in your changes.

[Energon7]

Now tests passed successfully.

[rchl]

I've also asked for a new test that tests the behavior that was fixed.

If you don't have time or don't know how to do it then this will have to wait until I have time.