Fixing UnitTest

Author: mairbek

rxjava-core/src/main/java/rx/operators/OperationObserveOn.java

@@ -69,14 +69,17 @@ public void testObserveOn() {
 
         @Test
         @SuppressWarnings("unchecked")
-        public void testOrdering() {
+        public void testOrdering() throws InterruptedException {
             Observable<String> obs = Observable.from("one", null, "two", "three", "four");
 
             Observer<String> observer = mock(Observer.class);
 
             InOrder inOrder = inOrder(observer);
 
             obs.observeOn(Schedulers.threadPoolForComputation()).subscribe(observer);
+
+            Thread.sleep(500); // !!! not a true unit test
+
             inOrder.verify(observer, times(1)).onNext("one");
             inOrder.verify(observer, times(1)).onNext(null);
             inOrder.verify(observer, times(1)).onNext("two");