add more tests

__tests__/translit.test.ts

@@ -78,6 +78,16 @@ describe('apply', () => {
     const expected = 'Melxo ə, şuna cẋanna ə txayx bala ca barẋama, diynaẋ ə, busa ə, q̇a ə ẋöguş, bolx bora oxa.';
     expect(apply(text)).toBe(expected);
   });
+  it('should transliterate a text correctly', () => {
+    const text = 'чекхъели чекХъели чекхЪели чекХЪели чекхъЕли чекХъЕли чекхЪЕли чекХЪЕли ЧЕКХЪЕЛИ Чекхъели';
+    const expected = 'çeqyeli çeqyeli çeqyeli çeqyeli çeqYeli çeqYeli çeqYeli çeqYeli ÇEQYELI Çeqyeli';
+    expect(apply(text)).toBe(expected);
+  });
+  it('should transliterate a text correctly', () => {
+    const text = "къегина Къегина кЪегина КЪегина къЕгина КъЕгина кЪЕгина КЪЕгина КЪЕГИНА Къегина";
+    const expected = 'q̇egina Q̇egina q̇egina Q̇egina q̇Egina Q̇Egina q̇Egina Q̇Egina Q̇EGINA Q̇egina';
+    expect(apply(text)).toBe(expected);
+  });
 
   it('should replace standalone Cyrillic "а" with "ə"', () => {
     expect(apply('дӏахь а доьгӏна')).toBe('djaẋ ə döġna');

jsr.json

@@ -1,5 +1,5 @@
 {
   "name": "@ce/transliteration",
-  "version": "0.1.7",
+  "version": "0.1.8",
   "exports": "./translit.ts"
 }

translit.ts

@@ -51,8 +51,9 @@ export function applyToWord(word: string): string {
     ]) {
       if (translitMap.hasOwnProperty(key)) {
         const preLetter = i > 0 ? word[i - 1].toLowerCase() : '';
+        const nextLetter = i + 1 < word.length ? word[i + 1] : '';
         // if key is 'ъ' and next character is 'е', 'ё', 'ю', or 'я'
-        if ((key === 'ъ' || key === 'Ъ') && i + 1 < word.length && 'еёюяЕЁЮЯ'.includes(word[i + 1])) {
+        if ((key === 'ъ' || key === 'Ъ') && 'еёюяЕЁЮЯ'.includes(nextLetter)) {
           // if 'к' is before 'ъ', transliterate 'ъ' as 'q̇'
           if (i > 0 && (preLetter === 'к')) {
             match = word[i - 1] === 'к' ? 'q̇' : 'Q̇';
@@ -63,9 +64,10 @@ export function applyToWord(word: string): string {
           if (i === 0) {
             match = key === 'е' ? 'ye' : 'Ye'; // 'е' at the start of the word
           } else if (i > 0) {
-            const preConsonant = i > 1 ? word.substring(i - 2, i) : '';
-            if ((preLetter === 'ъ') && (i < 2 || (!['къ','Къ','кЪ','КЪ'].includes(preConsonant)))) {
-              match = key === 'е' ? 'ye' : 'Ye'; // 'е' following 'ъ' that does not follow 'къ'
+            const preConsonant = i > 1 ? word.substring(i - 2, i).toLowerCase() : '';
+            if ((preLetter === 'ъ') && (i < 2 || preConsonant !== 'къ')) {
+              // 'е' following 'ъ' that does not follow 'къ'
+              match = key === 'е' ? 'ye' : (nextLetter.toUpperCase() === nextLetter ? 'YE' : 'Ye');
             } else {
               match = translitMap[key]; // Regular transliteration for 'е'
             }