RESOURCE_EXHAUSTED is a possible error code as well, given https://developers.google.com/instance-id/reference/server

Author: JosRoseboom

src/main/java/com/google/firebase/messaging/TopicManagementResponse.java

@@ -41,6 +41,7 @@ public class TopicManagementResponse {
       .put("NOT_FOUND", "registration-token-not-registered")
       .put("INTERNAL", "internal-error")
       .put("TOO_MANY_TOPICS", "too-many-topics")
+      .put("RESOURCE_EXHAUSTED", "resource-exhausted")
       .build();
 
   private final int successCount;

src/test/java/com/google/firebase/messaging/InstanceIdClientImplTest.java

@@ -413,6 +413,17 @@ public void testTopicManagementResponseErrorToString() {
     assertEquals(expected, topicManagementResponse.getErrors().toString());
   }
 
+  @Test
+  public void testTopicManagementResponseErrorResourceExhausted() {
+    GenericJson json = new GenericJson().set("error", "RESOURCE_EXHAUSTED");
+    ImmutableList<GenericJson> jsonList = ImmutableList.of(json);
+
+    TopicManagementResponse topicManagementResponse = new TopicManagementResponse(jsonList);
+
+    String expected = "[Error{index=0, reason=resource-exhausted}]";
+    assertEquals(expected, topicManagementResponse.getErrors().toString());
+  }
+
   private static InstanceIdClientImpl initInstanceIdClient(
       final MockLowLevelHttpResponse mockResponse,
       final HttpResponseInterceptor interceptor) {