ditto/packages/lang/language.test.ts

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import { detectLanguage } from './language.ts';
import { assertEquals } from '@std/assert';
Deno.test('Detect English language', () => {
assertEquals(detectLanguage(``, 0.90), undefined);
assertEquals(detectLanguage(`Good morning my fellow friends`, 0.90), 'en');
assertEquals(
detectLanguage(
`Would you listen to Michael Jackson's songs?\n\nnostr:nevent1qvzqqqqqqypzqprpljlvcnpnw3pejvkkhrc3y6wvmd7vjuad0fg2ud3dky66gaxaqyvhwumn8ghj7cm0vfexzen4d4sjucm0d5hhyetvv9usqg8htx8xcjq7ffrzxu7nrhlr8vljcv6gpmet0auy87mpj6djxk4myqha02kp`,
0.90,
),
'en',
);
assertEquals(
detectLanguage(
`https://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_uhttps://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_uhttps://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_uhttps://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_uWould you listen to Michael Jackson's songs?\n\nnostr:nevent1qvzqqqqqqypzqprpljlvcnpnw3pejvkkhrc3y6wvmd7vjuad0fg2ud3dky66gaxaqyvhwumn8ghj7cm0vfexzen4d4sjucm0d5hhyetvv9usqg8htx8xcjq7ffrzxu7nrhlr8vljcv6gpmet0auy87mpj6djxk4myqha02kp`,
0.90,
),
'en',
);
assertEquals(
detectLanguage(
`https://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_u 😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎😂💯♡⌨︎ https://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_uhttps://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_uhttps://youtu.be/FxppefYTA2I?si=grgEpbEhFu_-3V_u Would you listen to Michael Jackson's songs?\n\nnostr:nevent1qvzqqqqqqypzqprpljlvcnpnw3pejvkkhrc3y6wvmd7vjuad0fg2ud3dky66gaxaqyvhwumn8ghj7cm0vfexzen4d4sjucm0d5hhyetvv9usqg8htx8xcjq7ffrzxu7nrhlr8vljcv6gpmet0auy87mpj6djxk4myqha02kp`,
0.90,
),
'en',
);
});
Deno.test('Detects definitive texts', () => {
// NOTE: pass `1` as min confidence to test only the definitive patterns
// unambiguous
assertEquals(detectLanguage('안녕하세요.', 1), 'ko');
assertEquals(detectLanguage('Γειά σου!', 1), 'el');
assertEquals(detectLanguage('שלום!', 1), 'he');
assertEquals(detectLanguage('こんにちは。', 1), 'ja');
assertEquals(
detectLanguage(
'最近、長女から「中学生男子全員クソ」という話を良く聞き中学生女子側の視点が分かってよかった。父からは「中学生男子は自分がクソだということを3年間かかって学習するんだよ」と言っておいた',
1,
),
'ja',
);
// ambiguous
assertEquals(detectLanguage('你好', 1), undefined);
assertEquals(detectLanguage('東京', 1), undefined);
assertEquals(detectLanguage('Привет', 1), undefined);
assertEquals(detectLanguage('Hello', 1), undefined);
});