[ISSUE #3949] Add UT for clientManager.

proxy/src/test/java/org/apache/rocketmq/proxy/client/ClientManagerTest.java

@@ -0,0 +1,51 @@
+/*
+ * 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.proxy.client;
+
+import org.apache.rocketmq.proxy.client.transaction.TransactionStateChecker;
+import org.apache.rocketmq.proxy.configuration.ConfigurationManager;
+import org.apache.rocketmq.proxy.configuration.InitConfigurationTest;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class ClientManagerTest extends InitConfigurationTest {
+
+    @Test
+    public void testClientManager() throws Exception {
+        TransactionStateChecker mockedTransactionStateChecker = Mockito.mock(TransactionStateChecker.class);
+        ClientManager clientManager = new ClientManager(mockedTransactionStateChecker);
+        clientManager.start();
+
+        assertThat(clientManager.getDefaultClient()).isNotNull();
+        assertThat(clientManager.getDefaultClient().getClientNum())
+            .isEqualTo(ConfigurationManager.getProxyConfig().getDefaultClientNum());
+
+        assertThat(clientManager.getProducerClient()).isNotNull();
+        assertThat(clientManager.getProducerClient().getClientNum())
+            .isEqualTo(ConfigurationManager.getProxyConfig().getProducerClientNum());
+
+        assertThat(clientManager.getReadConsumerClient()).isNotNull();
+        assertThat(clientManager.getReadConsumerClient().getClientNum())
+            .isEqualTo(ConfigurationManager.getProxyConfig().getConsumerClientNum());
+
+
+
+    }
+}