Overlay 2.0 (#12)

src/core/services/immersion-tracker/reducer.test.ts

@@ -0,0 +1,22 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { extractLineVocabulary, isKanji } from './reducer';
+
+test('isKanji follows canonical CJK ranges', () => {
+  assert.ok(isKanji('日'));
+  assert.ok(isKanji('𠀀'));
+  assert.ok(!isKanji('あ'));
+  assert.ok(!isKanji('a'));
+});
+
+test('extractLineVocabulary returns words and unique kanji', () => {
+  const result = extractLineVocabulary('hello 你好 猫');
+
+  assert.equal(result.words.length, 3);
+  assert.deepEqual(
+    new Set(result.words.map((entry) => `${entry.headword}/${entry.word}`)),
+    new Set(['hello/hello', '你好/你好', '猫/猫']),
+  );
+  assert.equal(result.words.every((entry) => entry.reading === ''), true);
+  assert.deepEqual(new Set(result.kanji), new Set(['你', '好', '猫']));
+});