minor fix

testing/register-test-azure/src/test/java/org/opengroup/osdu/register/subscriber/TestListTopicsApi.java

@@ -16,13 +16,21 @@
 
 package org.opengroup.osdu.register.subscriber;
 
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
 import com.sun.jersey.api.client.ClientResponse;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
+import org.opengroup.osdu.register.model.Topic;
 import org.opengroup.osdu.register.util.AzureTestUtils;
+import org.opengroup.osdu.register.util.RestDescriptor;
+
+import java.util.ArrayList;
+import java.util.List;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 public class TestListTopicsApi extends ListTopicsApiTest {
 
@@ -38,6 +46,18 @@ public class TestListTopicsApi extends ListTopicsApiTest {
         this.testUtils = null;
     }
 
+    @Override
+    protected void validate20XResponse(ClientResponse response, RestDescriptor descriptor) {
+        String body = response.getEntity(String.class);
+        java.lang.reflect.Type listType = new TypeToken<ArrayList<Topic>>() {
+        }.getType();
+        Gson gson = new Gson();
+        List<Topic> messages = gson.fromJson(body, listType);
+        assertTrue(messages.size() > 0);
+        String topic = System.getProperty("TEST_TOPIC_NAME", System.getenv("TEST_TOPIC_NAME"));
+        assertTrue(messages.stream().anyMatch(m -> m.name.equalsIgnoreCase(topic)));
+    }
+
     @Test
     @Override
     public void should_return400_when_makingHttpRequestWithoutToken() throws Exception {