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Fix EthernetTetheringTest#testLocalOnlyTethering flaky

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The testLocalOnlyTethering only verifies whether an IPv6 RA
with a ULA prefix is sent out. If the test interface is killed
after the RA is sent out while the DHCP server is starting,
the error callback with exception is raised. RunDhcp
verification is used to ensure that DHCP server is started.

Bug: 286701571
Test: TH

Change-Id: Iccebcedbba7b2f9cd28bb1cc06af928ff8dfaaca
This commit is contained in:
Mark
2023-07-26 07:56:33 +00:00
parent 7f8015fe9e
commit 801079f25a
1 changed files with 8 additions and 0 deletions
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8
Tethering/tests/integration/src/android/net/EthernetTetheringTest.java
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@@ -326,6 +326,14 @@ public class EthernetTetheringTest extends EthernetTetheringTestBase {
waitForRouterAdvertisement(downstreamReader, iface, WAIT_RA_TIMEOUT_MS);
expectLocalOnlyAddresses(iface);
// After testing the IPv6 local address, the DHCP server may still be in the process
// of being created. If the downstream interface is killed by the test while the
// DHCP server is starting, a DHCP server error may occur. To ensure that the DHCP
// server has started completely before finishing the test, also test the dhcp server
// by calling runDhcp.
final TetheringTester tester = new TetheringTester(downstreamReader);
tester.runDhcp(MacAddress.fromString("1:2:3:4:5:6").toByteArray());
} finally {
maybeStopTapPacketReader(downstreamReader);
maybeCloseTestInterface(downstreamIface);