feat(stats): speed up session maintenance and improve stats UI (#111)

src/stats-word-helper-client.test.ts

@@ -1,6 +1,9 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
-import { createInvokeStatsWordHelperHandler } from './stats-word-helper-client';
+import {
+  createInvokeStatsWordHelperHandler,
+  createReadStatsYomitanDeckNameHandler,
+} from './stats-word-helper-client';
 
 test('word helper client returns note id when helper responds before exit', async () => {
   const calls: string[] = [];
@@ -36,6 +39,39 @@ test('word helper client returns note id when helper responds before exit', asyn
   ]);
 });
 
+test('word helper client returns Yomitan deck name from helper read-deck mode', async () => {
+  const calls: string[] = [];
+  const handler = createReadStatsYomitanDeckNameHandler({
+    createTempDir: () => '/tmp/stats-word-helper',
+    joinPath: (...parts) => parts.join('/'),
+    spawnHelper: async (options) => {
+      calls.push(
+        `spawnHelper:${options.scriptPath}:${options.responsePath}:${options.userDataPath}:${options.mode}`,
+      );
+      return new Promise<number>((resolve) => setTimeout(() => resolve(0), 20));
+    },
+    waitForResponse: async (responsePath) => {
+      calls.push(`waitForResponse:${responsePath}`);
+      return { ok: true, deckName: ' Minecraft ' };
+    },
+    removeDir: (targetPath) => {
+      calls.push(`removeDir:${targetPath}`);
+    },
+  });
+
+  const deckName = await handler({
+    helperScriptPath: '/tmp/stats-word-helper.js',
+    userDataPath: '/tmp/SubMiner',
+  });
+
+  assert.equal(deckName, 'Minecraft');
+  assert.deepEqual(calls, [
+    'spawnHelper:/tmp/stats-word-helper.js:/tmp/stats-word-helper/response.json:/tmp/SubMiner:deck-name',
+    'waitForResponse:/tmp/stats-word-helper/response.json',
+    'removeDir:/tmp/stats-word-helper',
+  ]);
+});
+
 test('word helper client throws helper response errors', async () => {
   const handler = createInvokeStatsWordHelperHandler({
     createTempDir: () => '/tmp/stats-word-helper',