fix: clear PDF_TIMEOUT timers after successful render, fix test unhandled rejections

src/__tests__/browser-pool.test.ts

@@ -218,7 +218,16 @@ describe("browser pool", () => {
       expect(stats.pdfCount).toBe(1);
     });
 
+    it("cleans up timeout timer after successful render", async () => {
+      vi.useFakeTimers();
+      await browserModule.initBrowser();
+      await browserModule.renderPdf("<h1>Hello</h1>");
+      expect(vi.getTimerCount()).toBe(0);
+      vi.useRealTimers();
+    });
+
     it("rejects with PDF_TIMEOUT after 30s", async () => {
+      vi.useFakeTimers();
       await browserModule.initBrowser();
       // Make ALL pages' setContent hang so whichever is picked will timeout
       for (const b of mockBrowsers) {
@@ -227,11 +236,13 @@ describe("browser pool", () => {
         }
       }
 
-      vi.useFakeTimers();
       const renderPromise = browserModule.renderPdf("<h1>slow</h1>");
+      const renderResult = renderPromise.catch((e: Error) => e);
       await vi.advanceTimersByTimeAsync(30_001);
 
-      await expect(renderPromise).rejects.toThrow("PDF_TIMEOUT");
+      const err = await renderResult;
+      expect(err).toBeInstanceOf(Error);
+      expect((err as Error).message).toBe("PDF_TIMEOUT");
       vi.useRealTimers();
     });
   });
@@ -322,6 +333,7 @@ describe("browser pool", () => {
     });
 
     it("rejects with QUEUE_FULL after 30s timeout when all pages busy", async () => {
+      vi.useFakeTimers();
       await browserModule.initBrowser();
 
       // Make all pages hang
@@ -331,20 +343,27 @@ describe("browser pool", () => {
         }
       }
 
-      // Consume all 4 pages (these will hang)
-      browserModule.renderPdf("<p>1</p>");
-      browserModule.renderPdf("<p>2</p>");
-      browserModule.renderPdf("<p>3</p>");
-      browserModule.renderPdf("<p>4</p>");
+      // Consume all 4 pages (these will hang) — catch their rejections
+      const hanging = [
+        browserModule.renderPdf("<p>1</p>").catch(() => {}),
+        browserModule.renderPdf("<p>2</p>").catch(() => {}),
+        browserModule.renderPdf("<p>3</p>").catch(() => {}),
+        browserModule.renderPdf("<p>4</p>").catch(() => {}),
+      ];
 
-      vi.useFakeTimers();
-      // 5th request should queue
+      // 5th request should queue — attach catch immediately to prevent unhandled rejection
       const queued = browserModule.renderPdf("<p>5</p>");
+      const queuedResult = queued.catch((e: Error) => e);
 
-      // Advance past queue timeout
+      // Advance past all timeouts (queue + PDF_TIMEOUT for hanging renders)
       await vi.advanceTimersByTimeAsync(30_001);
 
-      await expect(queued).rejects.toThrow("QUEUE_FULL");
+      const err = await queuedResult;
+      expect(err).toBeInstanceOf(Error);
+      expect((err as Error).message).toBe("QUEUE_FULL");
+
+      // Let hanging PDF_TIMEOUT rejections settle
+      await Promise.allSettled(hanging);
 
       vi.useRealTimers();
     });