wu-sheng commented on a change in pull request #1079: apm collector ui module 
testcase completed
URL: 
https://github.com/apache/incubator-skywalking/pull/1079#discussion_r181938234
 
 

 ##########
 File path: 
apm-collector/apm-collector-ui/collector-ui-jetty-provider/src/test/java/org/apache/skywalking/apm/collector/ui/service/TopologyBuilderTest.java
 ##########
 @@ -0,0 +1,156 @@
+/*
+ * 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.skywalking.apm.collector.ui.service;
+
+import 
org.apache.skywalking.apm.collector.cache.service.ApplicationCacheService;
+import org.apache.skywalking.apm.collector.core.module.MockModule;
+import org.apache.skywalking.apm.collector.core.module.ModuleManager;
+import 
org.apache.skywalking.apm.collector.storage.dao.ui.IApplicationComponentUIDAO;
+import 
org.apache.skywalking.apm.collector.storage.dao.ui.IApplicationMappingUIDAO;
+import 
org.apache.skywalking.apm.collector.storage.dao.ui.IApplicationMetricUIDAO;
+import 
org.apache.skywalking.apm.collector.storage.dao.ui.IApplicationReferenceMetricUIDAO;
+import org.apache.skywalking.apm.collector.storage.table.register.Application;
+import org.apache.skywalking.apm.collector.storage.ui.alarm.Alarm;
+import org.apache.skywalking.apm.collector.storage.ui.alarm.AlarmItem;
+import org.apache.skywalking.apm.collector.storage.ui.common.Duration;
+import org.apache.skywalking.apm.collector.storage.ui.common.Step;
+import org.apache.skywalking.apm.collector.storage.ui.common.Topology;
+import org.apache.skywalking.apm.collector.ui.utils.DurationUtils;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mockito;
+import org.mockito.internal.util.reflection.Whitebox;
+
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import static org.mockito.Matchers.*;
+import static org.mockito.Mockito.mock;
+import static org.powermock.api.mockito.PowerMockito.when;
+
+/**
+ * @author lican
+ */
+public class TopologyBuilderTest {
+
+    private ApplicationCacheService applicationCacheService;
+    private ServerService serverService;
+    private SecondBetweenService secondBetweenService;
+    private AlarmService alarmService;
+    private TopologyBuilder topologyBuilder;
+    private Duration duration;
+    private long startSecondTimeBucket;
+    private long endSecondTimeBucket;
+    private long startTimeBucket;
+    private long endTimeBucket;
+
+    @Before
+    public void setUp() throws Exception {
+        ModuleManager moduleManager = mock(ModuleManager.class);
+        when(moduleManager.find(anyString())).then(invocation -> new 
MockModule());
+        topologyBuilder = new TopologyBuilder(moduleManager);
+        applicationCacheService = mock(ApplicationCacheService.class);
+        alarmService = mock(AlarmService.class);
+        secondBetweenService = mock(SecondBetweenService.class);
+        Whitebox.setInternalState(topologyBuilder, "applicationCacheService", 
applicationCacheService);
+        Whitebox.setInternalState(topologyBuilder, "alarmService", 
alarmService);
+        Whitebox.setInternalState(topologyBuilder, "secondBetweenService", 
secondBetweenService);
+        duration = new Duration();
+        duration.setEnd("2018-02");
+        duration.setStart("2018-01");
+        duration.setStep(Step.MONTH);
+        startSecondTimeBucket = 
DurationUtils.INSTANCE.startTimeDurationToSecondTimeBucket(duration.getStep(), 
duration.getStart());
+        endSecondTimeBucket = 
DurationUtils.INSTANCE.endTimeDurationToSecondTimeBucket(duration.getStep(), 
duration.getEnd());
+        startTimeBucket = 
DurationUtils.INSTANCE.exchangeToTimeBucket(duration.getStart());
+        endTimeBucket = 
DurationUtils.INSTANCE.exchangeToTimeBucket(duration.getEnd());
+    }
+
+    @Test
+    public void build() throws ParseException {
 
 Review comment:
   @peng-yongsheng You can feel relax about these type test cases. I agree, on 
one can be easy to mock topology and trace related test cases. We can count on 
your automatic backend test to cover these.

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