Add tests

Author: sumeruchat

iterableapi/src/test/java/com/iterable/iterableapi/IterableFirebaseMessagingServiceTest.java

@@ -23,6 +23,7 @@
 import static junit.framework.TestCase.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
@@ -136,6 +137,7 @@ public void testUpdateMessagesIsCalled() throws Exception {
         RemoteMessage.Builder builder = new RemoteMessage.Builder("[email protected]");
         builder.setData(IterableTestUtils.getMapFromJsonResource("push_payload_embedded_update.json"));
         controller.get().onMessageReceived(builder.build());
-        verify(embeddedManagerSpy).syncMessages();
+        // syncMessages() may be called multiple times (from handleMessageReceived and from completeUserLogin)
+        verify(embeddedManagerSpy, atLeastOnce()).syncMessages();
     }
 }