✅ test: 3 new tests for addJobs (74/74 pass)

- addJobs injects new tasks into running batch (verified concurrent execution)
- addJobs rejects duplicate jobIds already in batch
- addJobs returns added=0 when not running

These tests verify the fix in v2.6.3 (files added during upload now
get injected into the running batch via addJobsToBatch).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/upload-manager.test.js

@@ -409,6 +409,75 @@ describe('UploadManager', () => {
     assert.ok(maxConcurrent <= 2, `scaleParallelUploads should cap at 2, was ${maxConcurrent}`);
   });
 
+  it('addJobs injects new tasks into running batch', async () => {
+    let started = 0;
+    mockUploadFile.mock.mockImplementation(async (hoster, filePath, apiKey, onProgress) => {
+      started++;
+      await new Promise(r => setTimeout(r, 100));
+      if (onProgress) onProgress(fakeFileSize, fakeFileSize);
+      return { download_url: 'ok', embed_url: null, file_code: 'ok' };
+    });
+
+    const mgr = new UploadManager({});
+    let summary = null;
+    mgr.on('batch-done', (s) => { summary = s; });
+
+    // Start batch with 2 tasks
+    const batchPromise = mgr.startBatch([
+      { jobId: 'job-1', file: '/test/a.mp4', hoster: 'doodstream.com', apiKey: 'k' },
+      { jobId: 'job-2', file: '/test/b.mp4', hoster: 'doodstream.com', apiKey: 'k' }
+    ]);
+
+    // After 30ms (during upload), inject 2 more tasks
+    await new Promise(r => setTimeout(r, 30));
+    const result = mgr.addJobs([
+      { jobId: 'job-3', file: '/test/c.mp4', hoster: 'doodstream.com', apiKey: 'k' },
+      { jobId: 'job-4', file: '/test/d.mp4', hoster: 'doodstream.com', apiKey: 'k' }
+    ]);
+    assert.equal(result.added, 2, 'should add 2 new jobs');
+    assert.equal(result.alreadyInBatchJobIds.length, 0);
+
+    await batchPromise;
+    assert.ok(summary);
+    assert.equal(started, 4, 'all 4 jobs should have run');
+  });
+
+  it('addJobs rejects duplicates already in running batch', async () => {
+    mockUploadFile.mock.mockImplementation(async (hoster, filePath, apiKey, onProgress, signal) => {
+      // Slow upload so we can add jobs while it's running
+      await new Promise((resolve, reject) => {
+        const timer = setTimeout(resolve, 200);
+        if (signal) signal.addEventListener('abort', () => { clearTimeout(timer); reject(new Error('Aborted')); });
+      });
+      if (onProgress) onProgress(fakeFileSize, fakeFileSize);
+      return { download_url: 'ok', embed_url: null, file_code: 'ok' };
+    });
+
+    const mgr = new UploadManager({});
+    const batchPromise = mgr.startBatch([
+      { jobId: 'job-A', file: '/test/x.mp4', hoster: 'doodstream.com', apiKey: 'k' }
+    ]);
+
+    // Try to add the SAME jobId while it's running
+    await new Promise(r => setTimeout(r, 50));
+    const result = mgr.addJobs([
+      { jobId: 'job-A', file: '/test/x.mp4', hoster: 'doodstream.com', apiKey: 'k' },
+      { jobId: 'job-B', file: '/test/y.mp4', hoster: 'doodstream.com', apiKey: 'k' }
+    ]);
+    assert.equal(result.added, 1, 'should skip duplicate jobId, add only the new one');
+    assert.deepEqual(result.alreadyInBatchJobIds, ['job-A']);
+
+    await batchPromise;
+  });
+
+  it('addJobs returns added=0 when not running', () => {
+    const mgr = new UploadManager({});
+    const result = mgr.addJobs([
+      { jobId: 'job-1', file: '/test/a.mp4', hoster: 'doodstream.com', apiKey: 'k' }
+    ]);
+    assert.equal(result.added, 0);
+  });
+
   it('stats event contains expected fields', async () => {
     // Make upload take long enough for stats interval to fire
     mockUploadFile.mock.mockImplementation(async (hoster, filePath, apiKey, onProgress, signal) => {