add tests for GetAvailableLanguages handler

[ashb155]

Contributor checklist

• This pull request is on a separate branch and not the main branch
• I have ran the ./pre-commit executable as well as make lint and have fixed all reported issues

---

Description

Adds unit tests for the GetAvailableLanguages HTTP handler (GET /api/v1/languages) using net/http/httptest

Test Scenarios Covered

1. 200 OK with populated array: Tests successful retrieval and formatting of multiple languages with their associated data types.
2. 500 Internal Server Error: Tests the error path when GetAvailableLanguages fails.
3. Partial-failure path: Tests that an individual language failing GetLanguageDataTypes is gracefully skipped rather than failing the entire request.

Coverage

• api/handlers: 5.3% -> 11.9%

Related Issue

Closes #84

[DeleMike]

reviewing...

[DeleMike]

Thanks again @ashb155 , all looks good to me!

[DeleMike]

cc: @andrewtavis you can approve and merge anytime :)

[DeleMike]

adding some new changes concerning the new profanity and propositions...

[ashb155]

thank you for the review and additions @DeleMike !

[DeleMike]

So, I wanted to update the endpoint to ensure that we now have preopositions and profanity count as part of the language-stats endpoint.

[DeleMike]

You can check this out @andrewtavis

We now have:

[
  {
    "code": "de",
    "language_name": "German",
    "nouns": 178751,
    "verbs": 23,
    "prepositions": 196,
    "profanity": 113
  },
  {
    "code": "en",
    "language_name": "English",
    "nouns": 33498,
    "verbs": 8787,
    "prepositions": null,
    "profanity": 85
  },
  {
    "code": "es",
    "language_name": "Spanish",
    "nouns": 28022,
    "verbs": 8572,
    "prepositions": null,
    "profanity": 16
  },
  {
    "code": "fr",
    "language_name": "French",
    "nouns": 12769,
    "verbs": 5966,
    "prepositions": null,
    "profanity": 12
  },
  {
    "code": "it",
    "language_name": "Italian",
    "nouns": 33333,
    "verbs": 7667,
    "prepositions": null,
    "profanity": 32
  },
  {
    "code": "pt",
    "language_name": "Portuguese",
    "nouns": 2634,
    "verbs": 509,
    "prepositions": null,
    "profanity": 182
  },
  {
    "code": "ru",
    "language_name": "Russian",
    "nouns": 101217,
    "verbs": 12,
    "prepositions": 27,
    "profanity": 10
  },
  {
    "code": "sv",
    "language_name": "Swedish",
    "nouns": 39767,
    "verbs": 5102,
    "prepositions": null,
    "profanity": 61
  }
]

[andrewtavis]

double praise: All of this looks amazing, @ashb155 and @DeleMike! Thank you both for the tests, features and the collaboration here! 💙