@Test
public void shutdownBeforeTransportCreatedWithPendingStream() throws Exception {
SocketAddress addr = mock(SocketAddress.class);
createTransportSet(addr);
// First transport is created immediately
ClientTransport pick = transportSet.obtainActiveTransport();
assertEquals(ConnectivityState.CONNECTING, transportSet.getState(false));
verify(mockTransportFactory).newClientTransport(addr, AUTHORITY, USER_AGENT);
assertNotNull(pick);
// Fail this one
MockClientTransportInfo transportInfo = transports.poll();
transportInfo.listener.transportShutdown(Status.UNAVAILABLE);
assertEquals(ConnectivityState.TRANSIENT_FAILURE, transportSet.getState(false));
transportInfo.listener.transportTerminated();
// Second transport will wait for back-off
pick = transportSet.obtainActiveTransport();
assertTrue(pick instanceof DelayedClientTransport);
// Start a stream, which will be pending in the delayed transport
ClientStream pendingStream =
pick.newStream(method, headers, waitForReadyCallOptions, statsTraceCtx);
pendingStream.start(mockStreamListener);
// Shut down TransportSet before the transport is created. Further call to
// obtainActiveTransport() gets failing transports
assertEquals(ConnectivityState.TRANSIENT_FAILURE, transportSet.getState(false));
transportSet.shutdown();
assertEquals(ConnectivityState.SHUTDOWN, transportSet.getState(false));
pick = transportSet.obtainActiveTransport();
assertNotNull(pick);
assertTrue(pick instanceof FailingClientTransport);
verify(mockTransportFactory).newClientTransport(addr, AUTHORITY, USER_AGENT);
// Reconnect will eventually happen, even though TransportSet has been shut down
fakeClock.forwardMillis(10);
assertEquals(ConnectivityState.SHUTDOWN, transportSet.getState(false));
verify(mockTransportFactory, times(2)).newClientTransport(addr, AUTHORITY, USER_AGENT);
// The pending stream will be started on this newly started transport after it's ready.
// The transport is shut down by TransportSet right after the stream is created.
transportInfo = transports.poll();
verify(transportInfo.transport, times(0)).shutdown();
assertEquals(0, fakeExecutor.numPendingTasks());
transportInfo.listener.transportReady();
assertEquals(ConnectivityState.SHUTDOWN, transportSet.getState(false));
verify(transportInfo.transport, times(0))
.newStream(any(MethodDescriptor.class), any(Metadata.class));
assertEquals(1, fakeExecutor.runDueTasks());
verify(transportInfo.transport)
.newStream(
same(method),
same(headers),
same(waitForReadyCallOptions),
any(StatsTraceContext.class));
verify(transportInfo.transport).shutdown();
transportInfo.listener.transportShutdown(Status.UNAVAILABLE);
assertEquals(ConnectivityState.SHUTDOWN, transportSet.getState(false));
verify(mockTransportSetCallback, never()).onTerminated(any(TransportSet.class));
// Terminating the transport will let TransportSet to be terminated.
transportInfo.listener.transportTerminated();
assertEquals(ConnectivityState.SHUTDOWN, transportSet.getState(false));
verify(mockTransportSetCallback).onTerminated(transportSet);
// No more transports will be created.
fakeClock.forwardMillis(10000);
assertEquals(ConnectivityState.SHUTDOWN, transportSet.getState(false));
verifyNoMoreInteractions(mockTransportFactory);
assertEquals(0, transports.size());
}
@After
public void noMorePendingTasks() {
assertEquals(0, fakeClock.numPendingTasks());
assertEquals(0, fakeExecutor.numPendingTasks());
}