avoid look-behind in nyaize - fixes 419

packages/frontend/test/nyaize.test.ts

@@ -0,0 +1,32 @@
+import { describe, test, assert, afterEach } from 'vitest';
+import { nyaize } from '@/scripts/nyaize.js';
+
+function runTests(cases) {
+    for (const c of cases) {
+        const [input,expected] = c;
+        const got = nyaize(input);
+        assert.strictEqual(got, expected);
+    }
+}
+
+describe('nyaize', () => {
+    test('ja-JP', () => {
+        runTests([
+            ['きれいな','きれいにゃ'],
+            ['ナナナ', 'ニャニャニャ'],
+            ['ﾅﾅ','ﾆｬﾆｬ'],
+        ]);
+    });
+    test('en-US', () => {
+        runTests([
+            ['bar','bar'],
+            ['banana','banyanya'],
+            ['booting','booting'],
+            ['morning','mornyan'],
+            ['mmmorning','mmmornyan'],
+            ['someone','someone'],
+            ['everyone','everynyan'],
+            ['foreveryone','foreverynyan'],
+        ]);
+    });
+});