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[mdns] add test for truncated query eviction (#11857)

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This commit adds a test case to `TestMultiPacket` to validate the
correct eviction of pending truncated queries.

The test scenario sends the same truncated query multiple times,
followed by a query containing a matching known answer. It then
verifies that no response is sent, confirming that the initial
pending queries were successfully evicted from the message queue.
This validates the fix from #11854.
This commit is contained in:
Abtin Keshavarzian
2025-08-26 11:03:14 -07:00
committed by GitHub
parent e0b6bbeccd
commit 819313474e
1 changed files with 23 additions and 0 deletions
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tests/unit/test_mdns.cpp
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@@ -4813,6 +4813,29 @@ void TestMultiPacket(void)
AdvanceTime(5000);
VerifyOrQuit(sDnsMessages.IsEmpty());
Log("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
Log("Send the same truncated query multiple times to validate msg eviction");
AdvanceTime(2000);
sDnsMessages.Clear();
SendQuery("_services._dns-sd._udp.local.", ResourceRecord::kTypePtr, ResourceRecord::kClassInternet,
/* aTruncated */ true);
AdvanceTime(20);
SendQuery("_services._dns-sd._udp.local.", ResourceRecord::kTypePtr, ResourceRecord::kClassInternet,
/* aTruncated */ true);
knownAnswers[1].mPtrAnswer = "_tst._udp.local.";
knownAnswers[1].mTtl = 4500;
SendEmtryPtrQueryWithKnownAnswers("_services._dns-sd._udp.local.", knownAnswers, 2);
Log("We expect no response since the followed-up message contains a matching known-answer");
AdvanceTime(5000);
VerifyOrQuit(sDnsMessages.IsEmpty());
SuccessOrQuit(mdns->SetEnabled(false, kInfraIfIndex));
VerifyOrQuit(sHeapAllocatedPtrs.GetLength() <= heapAllocations);