[ISSUE #8437] Add more test coverage for ClientRemotingProcessor (#8433)

* [ISSUE #8262] Add more test coverage for ClientRemotingProcessor

* Update

* Update

client/src/test/java/org/apache/rocketmq/client/impl/ClientRemotingProcessorTest.java

@@ -0,0 +1,213 @@
+/*
+ * 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.client.impl;
+
+import io.netty.channel.ChannelHandlerContext;
+import org.apache.rocketmq.client.ClientConfig;
+import org.apache.rocketmq.client.exception.MQClientException;
+import org.apache.rocketmq.client.impl.factory.MQClientInstance;
+import org.apache.rocketmq.client.impl.producer.MQProducerInner;
+import org.apache.rocketmq.common.message.MessageConst;
+import org.apache.rocketmq.common.message.MessageDecoder;
+import org.apache.rocketmq.common.message.MessageExt;
+import org.apache.rocketmq.remoting.exception.RemotingException;
+import org.apache.rocketmq.remoting.protocol.RemotingCommand;
+import org.apache.rocketmq.remoting.protocol.RemotingSerializable;
+import org.apache.rocketmq.remoting.protocol.RequestCode;
+import org.apache.rocketmq.remoting.protocol.ResponseCode;
+import org.apache.rocketmq.remoting.protocol.body.ConsumeMessageDirectlyResult;
+import org.apache.rocketmq.remoting.protocol.body.ConsumerRunningInfo;
+import org.apache.rocketmq.remoting.protocol.body.ResetOffsetBody;
+import org.apache.rocketmq.remoting.protocol.header.CheckTransactionStateRequestHeader;
+import org.apache.rocketmq.remoting.protocol.header.ConsumeMessageDirectlyResultRequestHeader;
+import org.apache.rocketmq.remoting.protocol.header.GetConsumerRunningInfoRequestHeader;
+import org.apache.rocketmq.remoting.protocol.header.GetConsumerStatusRequestHeader;
+import org.apache.rocketmq.remoting.protocol.header.NotifyConsumerIdsChangedRequestHeader;
+import org.apache.rocketmq.remoting.protocol.header.ReplyMessageRequestHeader;
+import org.apache.rocketmq.remoting.protocol.header.ResetOffsetRequestHeader;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+
+import static org.apache.rocketmq.common.message.MessageDecoder.NAME_VALUE_SEPARATOR;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+@RunWith(MockitoJUnitRunner.class)
+public class ClientRemotingProcessorTest {
+
+    @Mock
+    private MQClientInstance mQClientFactory;
+
+    private ClientRemotingProcessor processor;
+
+    private final String defaultTopic = "defaultTopic";
+
+    private final String defaultBroker = "defaultBroker";
+
+    private final String defaultGroup = "defaultGroup";
+
+    @Before
+    public void init() throws RemotingException, InterruptedException, MQClientException {
+        processor = new ClientRemotingProcessor(mQClientFactory);
+        ClientConfig clientConfig = mock(ClientConfig.class);
+        when(clientConfig.getNamespace()).thenReturn("namespace");
+        when(mQClientFactory.getClientConfig()).thenReturn(clientConfig);
+        MQProducerInner producerInner = mock(MQProducerInner.class);
+        when(mQClientFactory.selectProducer(defaultGroup)).thenReturn(producerInner);
+    }
+
+    @Test
+    public void testCheckTransactionState() throws Exception {
+        ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+        RemotingCommand request = mock(RemotingCommand.class);
+        when(request.getCode()).thenReturn(RequestCode.CHECK_TRANSACTION_STATE);
+        when(request.getBody()).thenReturn(getMessageResult());
+        CheckTransactionStateRequestHeader requestHeader = new CheckTransactionStateRequestHeader();
+        when(request.decodeCommandCustomHeader(CheckTransactionStateRequestHeader.class)).thenReturn(requestHeader);
+        assertNull(processor.processRequest(ctx, request));
+    }
+
+    @Test
+    public void testNotifyConsumerIdsChanged() throws Exception {
+        ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+        RemotingCommand request = mock(RemotingCommand.class);
+        when(request.getCode()).thenReturn(RequestCode.NOTIFY_CONSUMER_IDS_CHANGED);
+        NotifyConsumerIdsChangedRequestHeader requestHeader = new NotifyConsumerIdsChangedRequestHeader();
+        when(request.decodeCommandCustomHeader(NotifyConsumerIdsChangedRequestHeader.class)).thenReturn(requestHeader);
+        assertNull(processor.processRequest(ctx, request));
+    }
+
+    @Test
+    public void testResetOffset() throws Exception {
+        ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+        RemotingCommand request = mock(RemotingCommand.class);
+        when(request.getCode()).thenReturn(RequestCode.RESET_CONSUMER_CLIENT_OFFSET);
+        ResetOffsetBody offsetBody = new ResetOffsetBody();
+        when(request.getBody()).thenReturn(RemotingSerializable.encode(offsetBody));
+        ResetOffsetRequestHeader requestHeader = new ResetOffsetRequestHeader();
+        when(request.decodeCommandCustomHeader(ResetOffsetRequestHeader.class)).thenReturn(requestHeader);
+        assertNull(processor.processRequest(ctx, request));
+    }
+
+    @Test
+    public void testGetConsumeStatus() throws Exception {
+        ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+        RemotingCommand request = mock(RemotingCommand.class);
+        when(request.getCode()).thenReturn(RequestCode.GET_CONSUMER_STATUS_FROM_CLIENT);
+        GetConsumerStatusRequestHeader requestHeader = new GetConsumerStatusRequestHeader();
+        when(request.decodeCommandCustomHeader(GetConsumerStatusRequestHeader.class)).thenReturn(requestHeader);
+        assertNotNull(processor.processRequest(ctx, request));
+    }
+
+    @Test
+    public void testGetConsumerRunningInfo() throws Exception {
+        ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+        RemotingCommand request = mock(RemotingCommand.class);
+        when(request.getCode()).thenReturn(RequestCode.GET_CONSUMER_RUNNING_INFO);
+        ConsumerRunningInfo consumerRunningInfo = new ConsumerRunningInfo();
+        consumerRunningInfo.setJstack("jstack");
+        when(mQClientFactory.consumerRunningInfo(anyString())).thenReturn(consumerRunningInfo);
+        GetConsumerRunningInfoRequestHeader requestHeader = new GetConsumerRunningInfoRequestHeader();
+        requestHeader.setJstackEnable(true);
+        requestHeader.setConsumerGroup(defaultGroup);
+        when(request.decodeCommandCustomHeader(GetConsumerRunningInfoRequestHeader.class)).thenReturn(requestHeader);
+        RemotingCommand command = processor.processRequest(ctx, request);
+        assertNotNull(command);
+        assertEquals(ResponseCode.SUCCESS, command.getCode());
+    }
+
+    @Test
+    public void testConsumeMessageDirectly() throws Exception {
+        ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+        RemotingCommand request = mock(RemotingCommand.class);
+        when(request.getCode()).thenReturn(RequestCode.CONSUME_MESSAGE_DIRECTLY);
+        when(request.getBody()).thenReturn(getMessageResult());
+        ConsumeMessageDirectlyResult directlyResult = mock(ConsumeMessageDirectlyResult.class);
+        when(mQClientFactory.consumeMessageDirectly(any(MessageExt.class), anyString(), anyString())).thenReturn(directlyResult);
+        ConsumeMessageDirectlyResultRequestHeader requestHeader = new ConsumeMessageDirectlyResultRequestHeader();
+        requestHeader.setConsumerGroup(defaultGroup);
+        requestHeader.setBrokerName(defaultBroker);
+        when(request.decodeCommandCustomHeader(ConsumeMessageDirectlyResultRequestHeader.class)).thenReturn(requestHeader);
+        RemotingCommand command = processor.processRequest(ctx, request);
+        assertNotNull(command);
+        assertEquals(ResponseCode.SUCCESS, command.getCode());
+    }
+
+    @Test
+    public void testReceiveReplyMessage() throws Exception {
+        ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+        RemotingCommand request = mock(RemotingCommand.class);
+        when(request.getCode()).thenReturn(RequestCode.PUSH_REPLY_MESSAGE_TO_CLIENT);
+        when(request.getBody()).thenReturn(getMessageResult());
+        when(request.decodeCommandCustomHeader(ReplyMessageRequestHeader.class)).thenReturn(createReplyMessageRequestHeader());
+        when(request.getBody()).thenReturn(new byte[1]);
+        RemotingCommand command = processor.processRequest(ctx, request);
+        assertNotNull(command);
+        assertEquals(ResponseCode.SUCCESS, command.getCode());
+    }
+
+    private ReplyMessageRequestHeader createReplyMessageRequestHeader() {
+        ReplyMessageRequestHeader result = new ReplyMessageRequestHeader();
+        result.setTopic(defaultTopic);
+        result.setQueueId(0);
+        result.setStoreTimestamp(System.currentTimeMillis());
+        result.setBornTimestamp(System.currentTimeMillis());
+        result.setReconsumeTimes(1);
+        result.setBornHost("127.0.0.1:12911");
+        result.setStoreHost("127.0.0.1:10911");
+        result.setSysFlag(1);
+        result.setFlag(1);
+        result.setProperties("CORRELATION_ID" + NAME_VALUE_SEPARATOR + "1");
+        return result;
+    }
+
+    private byte[] getMessageResult() throws Exception {
+        byte[] bytes = MessageDecoder.encode(createMessageExt(), false);
+        ByteBuffer byteBuffer = ByteBuffer.allocate(bytes.length);
+        byteBuffer.put(bytes);
+        return byteBuffer.array();
+    }
+
+    private MessageExt createMessageExt() {
+        MessageExt result = new MessageExt();
+        result.setBody("body".getBytes(StandardCharsets.UTF_8));
+        result.setTopic(defaultTopic);
+        result.setBrokerName(defaultBroker);
+        result.putUserProperty("key", "value");
+        result.getProperties().put(MessageConst.PROPERTY_PRODUCER_GROUP, defaultGroup);
+        result.getProperties().put(MessageConst.PROPERTY_UNIQ_CLIENT_MESSAGE_ID_KEYIDX, "TX1");
+        result.setKeys("keys");
+        SocketAddress bornHost = new InetSocketAddress("127.0.0.1", 12911);
+        SocketAddress storeHost = new InetSocketAddress("127.0.0.1", 10911);
+        result.setBornHost(bornHost);
+        result.setStoreHost(storeHost);
+        return result;
+    }
+}