Merge pull request #1886 from akarnokd/MergeFix

Buffer with time and merge fix

Author: benjchristensen

src/main/java/rx/internal/operators/OperatorBufferWithTime.java

@@ -72,15 +72,19 @@ public OperatorBufferWithTime(long timespan, long timeshift, TimeUnit unit, int
     @Override
     public Subscriber<? super T> call(final Subscriber<? super List<T>> child) {
         final Worker inner = scheduler.createWorker();
-        child.add(inner);
+        SerializedSubscriber<List<T>> serialized = new SerializedSubscriber<List<T>>(child);
 
         if (timespan == timeshift) {
-            ExactSubscriber bsub = new ExactSubscriber(new SerializedSubscriber<List<T>>(child), inner);
+            ExactSubscriber bsub = new ExactSubscriber(serialized, inner);
+            bsub.add(inner);
+            child.add(bsub);
             bsub.scheduleExact();
             return bsub;
         }
 
-        InexactSubscriber bsub = new InexactSubscriber(new SerializedSubscriber<List<T>>(child), inner);
+        InexactSubscriber bsub = new InexactSubscriber(serialized, inner);
+        bsub.add(inner);
+        child.add(bsub);
         bsub.startNewChunk();
         bsub.scheduleChunk();
         return bsub;
@@ -94,7 +98,6 @@ final class InexactSubscriber extends Subscriber<T> {
         /** Guarded by this. */
         boolean done;
         public InexactSubscriber(Subscriber<? super List<T>> child, Worker inner) {
-            super(child);
             this.child = child;
             this.inner = inner;
             this.chunks = new LinkedList<List<T>>();
@@ -219,7 +222,6 @@ final class ExactSubscriber extends Subscriber<T> {
         /** Guarded by this. */
         boolean done;
         public ExactSubscriber(Subscriber<? super List<T>> child, Worker inner) {
-            super(child);
             this.child = child;
             this.inner = inner;
             this.chunk = new ArrayList<T>();

src/main/java/rx/internal/operators/OperatorMerge.java

@@ -501,7 +501,7 @@ public void request(long n) {
                 REQUESTED.getAndAdd(this, n);
                 if (ms.drainQueuesIfNeeded()) {
                     boolean sendComplete = false;
-                    synchronized (this) {
+                    synchronized (ms) {
                         if (ms.wip == 0 && ms.scalarValueQueue != null && ms.scalarValueQueue.isEmpty()) {
                             sendComplete = true;
                         }

src/test/java/rx/internal/operators/OperatorBufferTest.java

@@ -981,4 +981,38 @@ public void onNext(List<Integer> t) {
         });
         assertEquals(Long.MAX_VALUE, requested.get());
     }
+    @Test(timeout = 3000)
+    public void testBufferWithTimeDoesntUnsubscribeDownstream() throws InterruptedException {
+    	@SuppressWarnings("unchecked")
+    	final Observer<Object> o = mock(Observer.class);
+    	
+    	
+    	final CountDownLatch cdl = new CountDownLatch(1);
+    	Subscriber<Object> s = new Subscriber<Object>() {
+    		@Override
+    		public void onNext(Object t) {
+    			o.onNext(t);
+    		}
+    		@Override
+    		public void onError(Throwable e) {
+    			o.onError(e);
+    			cdl.countDown();
+    		}
+    		@Override
+    		public void onCompleted() {
+    			o.onCompleted();
+    			cdl.countDown();
+    		}
+    	};
+    	
+    	Observable.range(1, 1).delay(1, TimeUnit.SECONDS).buffer(2, TimeUnit.SECONDS).unsafeSubscribe(s);
+    	
+    	cdl.await();
+    	
+    	verify(o).onNext(Arrays.asList(1));
+    	verify(o).onCompleted();
+    	verify(o, never()).onError(any(Throwable.class));
+    	
+    	assertFalse(s.isUnsubscribed());
+    }
 }