refactor: restore pre-v1 runtime follow-up flow

src/group-queue.test.ts

@@ -1,4 +1,5 @@
 import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
+import fs from 'fs';
 
 import { GroupQueue } from './group-queue.js';
 
@@ -62,6 +63,32 @@ describe('GroupQueue', () => {
     expect(maxConcurrent).toBe(1);
   });
 
+  it('pipes follow-up messages to an active non-task process', async () => {
+    let releaseRun!: (value: boolean) => void;
+    const blocker = new Promise<boolean>((resolve) => {
+      releaseRun = resolve;
+    });
+
+    const processMessages = vi.fn(
+      async () => await blocker,
+    );
+
+    queue.setProcessMessagesFn(processMessages);
+    queue.enqueueMessageCheck('group1@g.us', 'group-folder');
+    await vi.advanceTimersByTimeAsync(10);
+
+    expect(queue.sendMessage('group1@g.us', '후속 메시지')).toBe(true);
+    expect(fs.mkdirSync).toHaveBeenCalledWith(
+      '/tmp/ejclaw-test-data/ipc/group-folder/input',
+      { recursive: true },
+    );
+    expect(fs.writeFileSync).toHaveBeenCalled();
+    expect(fs.renameSync).toHaveBeenCalled();
+
+    releaseRun(true);
+    await vi.advanceTimersByTimeAsync(10);
+  });
+
   // --- Global concurrency limit ---
 
   it('respects global concurrency limit', async () => {