[RIP-10] Add test cases for ConsumerConnection (#834)

common/src/test/java/org/apache/rocketmq/common/protocol/body/ConsumerConnectionTest.java

+/*
+ * 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.rocketmq.common.protocol.body;
+
+import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
+import org.apache.rocketmq.common.protocol.heartbeat.ConsumeType;
+import org.apache.rocketmq.common.protocol.heartbeat.MessageModel;
+import org.apache.rocketmq.common.protocol.heartbeat.SubscriptionData;
+import org.apache.rocketmq.remoting.protocol.RemotingSerializable;
+import org.junit.Test;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class ConsumerConnectionTest {
+
+    @Test
+    public void testFromJson() {
+        ConsumerConnection consumerConnection = new ConsumerConnection();
+        HashSet<Connection> connections = new HashSet<Connection>();
+        Connection conn = new Connection();
+        connections.add(conn);
+
+        ConcurrentHashMap<String/* Topic */, SubscriptionData> subscriptionTable = new ConcurrentHashMap<String, SubscriptionData>();
+        SubscriptionData subscriptionData = new SubscriptionData();
+        subscriptionTable.put("topicA", subscriptionData);
+
+        ConsumeType consumeType = ConsumeType.CONSUME_ACTIVELY;
+        MessageModel messageModel = MessageModel.CLUSTERING;
+        ConsumeFromWhere consumeFromWhere = ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET;
+
+        consumerConnection.setConnectionSet(connections);
+        consumerConnection.setSubscriptionTable(subscriptionTable);
+        consumerConnection.setConsumeType(consumeType);
+        consumerConnection.setMessageModel(messageModel);
+        consumerConnection.setConsumeFromWhere(consumeFromWhere);
+
+        String json = RemotingSerializable.toJson(consumerConnection, true);
+        ConsumerConnection fromJson = RemotingSerializable.fromJson(json, ConsumerConnection.class);
+        assertThat(fromJson.getConsumeType()).isEqualTo(ConsumeType.CONSUME_ACTIVELY);
+        assertThat(fromJson.getMessageModel()).isEqualTo(MessageModel.CLUSTERING);
+
+        HashSet<Connection> connectionSet = fromJson.getConnectionSet();
+        assertThat(connectionSet).isInstanceOf(Set.class);
+
+        SubscriptionData data = fromJson.getSubscriptionTable().get("topicA");
+        assertThat(data).isExactlyInstanceOf(SubscriptionData.class);
+    }
+
+    @Test
+    public void testComputeMinVersion() {
+        ConsumerConnection consumerConnection = new ConsumerConnection();
+        HashSet<Connection> connections = new HashSet<Connection>();
+        Connection conn1 = new Connection();
+        conn1.setVersion(1);
+        connections.add(conn1);
+        Connection conn2 = new Connection();
+        conn2.setVersion(10);
+        connections.add(conn2);
+        consumerConnection.setConnectionSet(connections);
+
+        int version = consumerConnection.computeMinVersion();
+        assertThat(version).isEqualTo(1);
+    }
+}