Fix flaky test QuicHttpIntegrationTest::DeferredLoggingWithRetransmis…

…sion (envoyproxy#27850)

Fixes envoyproxy#27841:

Increase the sleep from 500->1000 ms.
Properly clean up the SocketInterfaceSwap.
Commit Message: Fix flaky test DeferredLoggingWithRetransmission
Risk Level: N/A, just testing

Signed-off-by: Paul Sohn <paulsohn@google.com>
Signed-off-by: asheryer <asheryer@amazon.com>

test/integration/quic_http_integration_test.cc

@@ -1392,16 +1392,16 @@ TEST_P(QuicHttpIntegrationTest, DeferredLoggingWithRetransmission) {
 
   // Temporarily prevent server from writing packets (i.e. to respond to downstream)
   // to simulate packet loss and trigger retransmissions.
-  SocketInterfaceSwap socket_swap(upstreamProtocol() == Http::CodecType::HTTP3
-                                      ? Network::Socket::Type::Datagram
-                                      : Network::Socket::Type::Stream);
-  Network::IoSocketError* ebadf = Network::IoSocketError::getIoSocketEbadfInstance();
-  socket_swap.write_matcher_->setDestinationPort(lookupPort("http"));
-  socket_swap.write_matcher_->setWriteOverride(ebadf);
-  upstream_request_->encodeHeaders(Http::TestResponseHeaderMapImpl{{":status", "200"}}, true);
-  absl::SleepFor(absl::Milliseconds(500 * TSAN_TIMEOUT_FACTOR));
-  // Allow the response to be sent downstream again.
-  socket_swap.write_matcher_->setWriteOverride(nullptr);
+  {
+    SocketInterfaceSwap socket_swap(downstreamProtocol() == Http::CodecType::HTTP3
+                                        ? Network::Socket::Type::Datagram
+                                        : Network::Socket::Type::Stream);
+    Network::IoSocketError* ebadf = Network::IoSocketError::getIoSocketEbadfInstance();
+    socket_swap.write_matcher_->setDestinationPort(lookupPort("http"));
+    socket_swap.write_matcher_->setWriteOverride(ebadf);
+    upstream_request_->encodeHeaders(Http::TestResponseHeaderMapImpl{{":status", "200"}}, true);
+    timeSystem().advanceTimeWait(std::chrono::seconds(TSAN_TIMEOUT_FACTOR));
+  }
 
   ASSERT_TRUE(response->waitForEndStream());
   codec_client_->close();