wujimin commented on a change in pull request #574: [SCB-372] support user set 
metrics prometheus exporter address not only port
URL: 
https://github.com/apache/incubator-servicecomb-java-chassis/pull/574#discussion_r172777876
 
 

 ##########
 File path: 
metrics/metrics-integration/metrics-prometheus/src/test/java/org/apache/servicecomb/metrics/prometheus/TestMetricsHttpPublisher.java
 ##########
 @@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.metrics.prometheus;
+
+import 
org.apache.servicecomb.foundation.common.exceptions.ServiceCombException;
+import org.junit.Assert;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+public class TestMetricsHttpPublisher {
+
+  @Rule
+  public ExpectedException thrown = ExpectedException.none();
+
+  @Test
+  public void testBadPublishAddress() {
+    thrown.expect(ServiceCombException.class);
+    new MetricsHttpPublisher("a:b:c");
+    Assert.fail("testPublishAddress failed : a:b:c");
 
 Review comment:
   no need to write Assert.fail
   because if ExpectedException  not matched, it's also cause to be a failure 
testcase.

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