@Test
public void testListenerErrorCanRestartReplication()
throws URISyntaxException, InterruptedException {
Listener listener = new Listener();
URI uri = new URI("http://127.0.0.1:5984/db1");
DatastoreExtended mockDatastore = mock(DatastoreExtended.class);
ReplicationStrategy mockStrategy = mock(ReplicationStrategy.class);
when(mockStrategy.isReplicationTerminated()).thenReturn(true);
when(mockStrategy.getEventBus()).thenReturn(new EventBus());
PullReplication pull = createPullReplication(uri, mockDatastore);
TestReplicator replicator = new TestReplicator(pull, mockStrategy);
replicator.getEventBus().register(listener);
replicator.start();
// Waits for callbacks to be run
replicator.error(
new ReplicationStrategyErrored(
mockStrategy, new ErrorInfo(new RuntimeException("Mocked error"))));
Assert.assertTrue(listener.run);
Assert.assertFalse(listener.errorThrown);
// Don't leave threads about the place
replicator.complete(new ReplicationStrategyCompleted(mockStrategy));
}
@Test(expected = IllegalStateException.class)
public void start_startWhenStopping_exception() throws Exception {
startAndVerify();
replicator.stop();
Assert.assertEquals(Replicator.State.STOPPING, replicator.getState());
replicator.start(); // can not restart until full stopped
}
@Test
public void complete_woListener_nothing() {
// don't subscribe to the eventbus
replicator.start();
replicator.complete(new ReplicationStrategyCompleted(mockStrategy));
verify(mockListener, never()).complete(any(ReplicationCompleted.class));
verify(mockListener, never()).error(any(ReplicationErrored.class));
}
@Test
public void start_errorThenRestarted() throws Exception {
startAndVerify();
replicator.stop();
Assert.assertEquals(Replicator.State.STOPPING, replicator.getState());
ErrorInfo err = new ErrorInfo(new RuntimeException("Mocked error"));
ReplicationStrategyErrored rse = new ReplicationStrategyErrored(mockStrategy, err);
ReplicationErrored re = new ReplicationErrored(replicator, err);
replicator.error(rse);
Assert.assertEquals(Replicator.State.ERROR, replicator.getState());
verify(mockListener).error(re);
verify(mockListener, never()).complete(any(ReplicationCompleted.class));
doAnswer(
new Answer() {
@Override
public Object answer(InvocationOnMock invocation) throws Throwable {
Thread.sleep(1000); // sleep for a second, will give enough time to check state
return null;
}
})
.when(mockStrategy)
.run();
replicator.start();
Assert.assertEquals(Replicator.State.STARTED, replicator.getState());
Assert.assertTrue(replicator.strategyThread().isAlive());
replicator.await();
Assert.assertFalse(replicator.strategyThread().isAlive());
verify(mockStrategy, times(2)).run();
}
@Test
public void error_woListener_nothing() {
// don't subscribe to the eventbus
replicator.start();
replicator.error(
new ReplicationStrategyErrored(
mockStrategy, new ErrorInfo(new RuntimeException("Mocked error"))));
verify(mockListener, never()).complete(any(ReplicationCompleted.class));
verify(mockListener, never()).error(any(ReplicationErrored.class));
}
@Test
public void startAndThenComplete_completeState() throws Exception {
startAndVerify();
ReplicationStrategyCompleted rsc = new ReplicationStrategyCompleted(mockStrategy);
ReplicationCompleted rc = new ReplicationCompleted(replicator, 0, 0);
replicator.complete(rsc);
verify(mockListener).complete(rc);
verify(mockListener, never()).error(any(ReplicationErrored.class));
Assert.assertEquals(Replicator.State.COMPLETE, replicator.getState());
Assert.assertFalse(replicator.strategyThread().isAlive());
}
@Test
public void startAndThenError_errorState() throws Exception {
startAndVerify();
ErrorInfo err = new ErrorInfo(new RuntimeException("Mocked error"));
ReplicationStrategyErrored rse = new ReplicationStrategyErrored(mockStrategy, err);
ReplicationErrored re = new ReplicationErrored(replicator, err);
replicator.error(rse);
verify(mockListener).error(re);
verify(mockListener, never()).complete(any(ReplicationCompleted.class));
Assert.assertEquals(Replicator.State.ERROR, replicator.getState());
Assert.assertFalse(replicator.strategyThread().isAlive());
}
@Test
public void startAgainBeforeComplete_nothing() throws Exception {
startAndVerify();
replicator.start();
verify(mockStrategy).run();
}
@Test
public void complete_exceptionInCompleteCallback_exceptionShouldCorruptAnything()
throws Exception {
startAndVerify();
ReplicationStrategyCompleted rsc = new ReplicationStrategyCompleted(mockStrategy);
ReplicationCompleted rc = new ReplicationCompleted(replicator, 0, 0);
doThrow(new RuntimeException("Mocked error")).when(mockListener).complete(rc);
replicator.complete(rsc);
verify(mockListener).complete(rc);
verify(mockListener, never()).error(any(ReplicationErrored.class));
Assert.assertEquals(Replicator.State.COMPLETE, replicator.getState());
Assert.assertFalse(replicator.strategyThread().isAlive());
}
private void startAndVerify() throws Exception {
Assert.assertEquals(Replicator.State.PENDING, replicator.getState());
Assert.assertNull(replicator.strategyThread());
replicator.getEventBus().register(mockListener);
replicator.start();
Assert.assertNotNull(replicator.strategyThread());
Assert.assertEquals(Replicator.State.STARTED, replicator.getState());
// Make sure the strategy returned before move on, other wise
// the mock strategy might not be called when you try to verify
replicator.await();
Assert.assertFalse(replicator.strategyThread().isAlive());
verify(mockStrategy).run();
// No interaction to listener yet
verifyZeroInteractions(mockListener);
}
@Test
public void start_woListener_nothing() {
// don't subscribe to the eventbus
replicator.start();
}
@Test
public void constructor() throws Exception {
Assert.assertEquals(Replicator.State.PENDING, replicator.getState());
Assert.assertNull(replicator.strategyThread());
}
@Test
public void stopBeforeStart_stopped() throws Exception {
replicator.stop();
Assert.assertEquals(Replicator.State.STOPPED, replicator.getState());
verify(mockStrategy, never()).run();
}