diff --git a/broker/src/test/java/org/apache/rocketmq/broker/client/ProducerManagerTest.java b/broker/src/test/java/org/apache/rocketmq/broker/client/ProducerManagerTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..08dbb9c754c51c198285e749adcbc2eeb25df0c0
--- /dev/null
+++ b/broker/src/test/java/org/apache/rocketmq/broker/client/ProducerManagerTest.java
@@ -0,0 +1,90 @@
+/*
+ * 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.broker.client;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+@RunWith(MockitoJUnitRunner.class)
+public class ProducerManagerTest {
+    private ProducerManager producerManager;
+    private String group = "FooBar";
+    private ClientChannelInfo clientInfo;
+
+    @Mock
+    private Channel channel;
+
+    @Before
+    public void init() {
+        producerManager = new ProducerManager();
+        clientInfo = new ClientChannelInfo(channel);
+    }
+
+    @Test
+    public void scanNotActiveChannel() throws Exception {
+        producerManager.registerProducer(group, clientInfo);
+        assertThat(producerManager.getGroupChannelTable().get(group).get(channel)).isNotNull();
+
+        Field field = ProducerManager.class.getDeclaredField("CHANNEL_EXPIRED_TIMEOUT");
+        field.setAccessible(true);
+        long CHANNEL_EXPIRED_TIMEOUT = field.getLong(producerManager);
+        clientInfo.setLastUpdateTimestamp(System.currentTimeMillis() - CHANNEL_EXPIRED_TIMEOUT - 10);
+        when(channel.close()).thenReturn(mock(ChannelFuture.class));
+        producerManager.scanNotActiveChannel();
+        assertThat(producerManager.getGroupChannelTable().get(group).get(channel)).isNull();
+    }
+
+    @Test
+    public void doChannelCloseEvent() throws Exception {
+        producerManager.registerProducer(group, clientInfo);
+        assertThat(producerManager.getGroupChannelTable().get(group).get(channel)).isNotNull();
+        producerManager.doChannelCloseEvent("127.0.0.1", channel);
+        assertThat(producerManager.getGroupChannelTable().get(group).get(channel)).isNull();
+    }
+
+    @Test
+    public void testRegisterProducer() throws Exception {
+        producerManager.registerProducer(group, clientInfo);
+        HashMap<Channel, ClientChannelInfo> channelMap = producerManager.getGroupChannelTable().get(group);
+        assertThat(channelMap).isNotNull();
+        assertThat(channelMap.get(channel)).isEqualTo(clientInfo);
+    }
+
+    @Test
+    public void unregisterProducer() throws Exception {
+        producerManager.registerProducer(group, clientInfo);
+        HashMap<Channel, ClientChannelInfo> channelMap = producerManager.getGroupChannelTable().get(group);
+        assertThat(channelMap).isNotNull();
+        assertThat(channelMap.get(channel)).isEqualTo(clientInfo);
+
+        producerManager.unregisterProducer(group, clientInfo);
+        channelMap = producerManager.getGroupChannelTable().get(group);
+        assertThat(channelMap).isNull();
+    }
+
+}
\ No newline at end of file