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# frozen_string_literal: true
require 'rails_helper'
RSpec.describe TranslationService::LibreTranslate do
subject(:service) { described_class.new('https://libretranslate.example.com', 'my-api-key') }
before do
stub_request(:get, 'https://libretranslate.example.com/languages').to_return(
body: '[{"code": "en","name": "English","targets": ["de","es"]},{"code": "da","name": "Danish","targets": ["en","de"]}]'
)
end
describe '#supported?' do
it 'supports included language pair' do
expect(service.supported?('en', 'de')).to be true
end
it 'does not support reversed language pair' do
expect(service.supported?('de', 'en')).to be false
end
it 'supports auto-detecting source language' do
expect(service.supported?(nil, 'de')).to be true
end
it 'does not support auto-detecting for unsupported target language' do
expect(service.supported?(nil, 'pt')).to be false
end
end
describe '#languages' do
subject(:languages) { service.send(:languages) }
it 'includes supported source languages' do
expect(languages.keys).to eq ['en', 'da', nil]
end
it 'includes supported target languages for source language' do
expect(languages['en']).to eq %w(de es)
end
it 'includes supported target languages for auto-detected language' do
expect(languages[nil]).to eq %w(de es en)
end
end
describe '#translate' do
it 'returns translation with specified source language' do
stub_request(:post, 'https://libretranslate.example.com/translate')
.with(body: '{"q":"Hasta la vista","source":"es","target":"en","format":"html","api_key":"my-api-key"}')
.to_return(body: '{"translatedText": "See you"}')
translation = service.translate('Hasta la vista', 'es', 'en')
expect(translation.detected_source_language).to eq 'es'
expect(translation.provider).to eq 'LibreTranslate'
expect(translation.text).to eq 'See you'
end
it 'returns translation with auto-detected source language' do
stub_request(:post, 'https://libretranslate.example.com/translate')
.with(body: '{"q":"Guten Morgen","source":"auto","target":"en","format":"html","api_key":"my-api-key"}')
.to_return(body: '{"detectedLanguage":{"confidence":92,"language":"de"},"translatedText":"Good morning"}')
translation = service.translate('Guten Morgen', nil, 'en')
expect(translation.detected_source_language).to be_nil
expect(translation.provider).to eq 'LibreTranslate'
expect(translation.text).to eq 'Good morning'
end
end
end
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