test: Fix flaky integration tests for RQ in shared mode (#803)

## Summary

- Add retry logic to `fetch_next_request()` calls in
`test_request_reclaim_functionality` to handle propagation delays in
shared request queue access mode
- The `[shared]` variant was flaky because newly added or reclaimed
requests may not be immediately visible
- Introduces a `_fetch_next_request_with_retry()` helper that polls up
to 10 times with 1-second intervals

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Author: vdusek

tests/integration/test_request_queue.py

@@ -26,6 +26,23 @@
     from apify.storage_clients._apify._models import ApifyRequestQueueMetadata
 
 
+async def fetch_next_request_with_exp_backoff(rq: RequestQueue, max_retries: int = 5) -> Request | None:
+    """Fetch the next request with exponential backoff retries.
+
+    In shared request queue mode, there is a propagation delay before newly added or reclaimed requests become visible
+    (see https://github.com/apify/apify-sdk-python/issues/808). This helper retries with exponential backoff to handle
+    that delay in integration tests.
+    """
+    for attempt in range(max_retries):
+        result = await rq.fetch_next_request()
+        if result is not None:
+            return result
+        delay = 2**attempt
+        Actor.log.info(f'fetch_next_request returned None, retrying in {delay}s (attempt {attempt + 1}/{max_retries})')
+        await asyncio.sleep(delay)
+    return None
+
+
 async def test_add_and_fetch_requests(request_queue_apify: RequestQueue) -> None:
     """Test basic functionality of adding and fetching requests."""
 
@@ -208,8 +225,12 @@ async def test_request_unique_key_behavior(request_queue_apify: RequestQueue) ->
     )
 
 
-async def test_request_reclaim_functionality(request_queue_apify: RequestQueue) -> None:
+async def test_request_reclaim_functionality(
+    request_queue_apify: RequestQueue,
+    request: pytest.FixtureRequest,
+) -> None:
     """Test request reclaiming for failed processing."""
+    rq_access_mode = request.node.callspec.params.get('request_queue_apify')
 
     rq = request_queue_apify
     Actor.log.info('Request queue opened')
@@ -219,36 +240,44 @@ async def test_request_reclaim_functionality(request_queue_apify: RequestQueue)
     Actor.log.info('Added test request')
 
     # Fetch and reclaim the request
-    request = await rq.fetch_next_request()
-    assert request is not None, f'request={request}'
-    Actor.log.info(f'Fetched request: {request.url}')
+    fetched_request = await rq.fetch_next_request()
+    assert fetched_request is not None
+    Actor.log.info(f'Fetched request: {fetched_request.url}')
 
     # Reclaim the request (simulate failed processing)
-    reclaim_result = await rq.reclaim_request(request)
-    assert reclaim_result is not None, f'reclaim_result={reclaim_result}'
-    assert reclaim_result.was_already_handled is False, (
-        f'reclaim_result.was_already_handled={reclaim_result.was_already_handled}'
-    )
+    reclaim_result = await rq.reclaim_request(fetched_request)
+    assert reclaim_result is not None
+    assert reclaim_result.was_already_handled is False
+
     Actor.log.info('Request reclaimed successfully')
 
-    # Should be able to fetch the same request again
-    request2 = await rq.fetch_next_request()
-    assert request2 is not None, f'request2={request2}'
-    assert request2.url == request.url, (
-        f'request2.url={request2.url}',
-        f'request.url={request.url}',
-    )
+    # Should be able to fetch the same request again.
+    # In shared mode, there is a propagation delay before the reclaimed request becomes visible
+    # (see https://github.com/apify/apify-sdk-python/issues/808).
+    if rq_access_mode == 'shared':
+        request2 = await fetch_next_request_with_exp_backoff(rq)
+    else:
+        request2 = await rq.fetch_next_request()
+
+    assert request2 is not None
+    assert request2.url == fetched_request.url
+
     Actor.log.info(f'Successfully fetched reclaimed request: {request2.url}')
 
     # Mark as handled this time
     await rq.mark_request_as_handled(request2)
     is_finished = await rq.is_finished()
-    assert is_finished is True, f'is_finished={is_finished}'
+    assert is_finished is True
 
 
-async def test_request_reclaim_with_forefront(request_queue_apify: RequestQueue) -> None:
+async def test_request_reclaim_with_forefront(
+    request_queue_apify: RequestQueue,
+    request: pytest.FixtureRequest,
+) -> None:
     """Test reclaiming requests to the front of the queue."""
 
+    rq_access_mode = request.node.callspec.params.get('request_queue_apify')
+
     rq = request_queue_apify
     Actor.log.info('Request queue opened')
 
@@ -260,20 +289,24 @@ async def test_request_reclaim_with_forefront(request_queue_apify: RequestQueue)
 
     # Fetch first request
     first_request = await rq.fetch_next_request()
-    assert first_request is not None, f'first_request={first_request}'
+    assert first_request is not None
     Actor.log.info(f'Fetched first request: {first_request.url}')
 
     # Reclaim to forefront
     await rq.reclaim_request(first_request, forefront=True)
     Actor.log.info('Request reclaimed to forefront')
 
-    # The reclaimed request should be fetched first again
-    next_request = await rq.fetch_next_request()
-    assert next_request is not None, f'next_request={next_request}'
-    assert next_request.url == first_request.url, (
-        f'next_request.url={next_request.url}',
-        f'first_request.url={first_request.url}',
-    )
+    # The reclaimed request should be fetched first again.
+    # In shared mode, there is a propagation delay before the reclaimed request becomes visible
+    # (see https://github.com/apify/apify-sdk-python/issues/808).
+    if rq_access_mode == 'shared':
+        next_request = await fetch_next_request_with_exp_backoff(rq)
+    else:
+        next_request = await rq.fetch_next_request()
+
+    assert next_request is not None
+    assert next_request.url == first_request.url
+
     Actor.log.info(f'Confirmed reclaimed request came first: {next_request.url}')
 
     # Clean up