[RIP-10] Add test case for KVTable (#828)

[RIP-10] Add test case for KVTable

common/src/test/java/org/apache/rocketmq/common/protocol/body/KVTableTest.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.remoting.protocol.RemotingSerializable;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class KVTableTest {
+
+    @Test
+    public void testFromJson() throws Exception {
+        HashMap<String, String> table = new HashMap<String, String>();
+        table.put("key1", "value1");
+        table.put("key2", "value2");
+
+        KVTable kvTable = new KVTable();
+        kvTable.setTable(table);
+
+        String json = RemotingSerializable.toJson(kvTable, true);
+        KVTable fromJson = RemotingSerializable.fromJson(json, KVTable.class);
+
+        assertThat(fromJson).isNotEqualTo(kvTable);
+        assertThat(fromJson.getTable().get("key1")).isEqualTo(kvTable.getTable().get("key1"));
+        assertThat(fromJson.getTable().get("key2")).isEqualTo(kvTable.getTable().get("key2"));
+    }
+
+}