[ISSUE #9658] Replace JUnit 5 imports with JUnit 4 (#9659)

* [ISSUE #9658] Replace JUnit 5 imports with JUnit 4

* Update test

client/src/test/java/org/apache/rocketmq/client/impl/mqclient/MQClientAPITest.java

@@ -17,8 +17,9 @@
 
 package org.apache.rocketmq.client.impl.mqclient;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
 
 import java.util.List;
 import java.util.concurrent.ScheduledExecutorService;
@@ -27,11 +28,11 @@ import org.apache.rocketmq.client.impl.ClientRemotingProcessor;
 import org.apache.rocketmq.common.MixAll;
 import org.apache.rocketmq.common.utils.ThreadUtils;
 import org.apache.rocketmq.remoting.RPCHook;
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
 
-class MQClientAPITest {
+public class MQClientAPITest {
 
     private NameserverAccessConfig nameserverAccessConfig;
     private final ClientRemotingProcessor clientRemotingProcessor = new DoNothingClientRemotingProcessor(null);
@@ -39,18 +40,18 @@ class MQClientAPITest {
     private ScheduledExecutorService scheduledExecutorService;
     private MQClientAPIFactory mqClientAPIFactory;
 
-    @BeforeEach
-    void setUp() {
+    @Before
+    public void setUp() {
         scheduledExecutorService = ThreadUtils.newSingleThreadScheduledExecutor("TestScheduledExecutorService", true);
     }
 
-    @AfterEach
+    @After
     public void tearDown() {
         scheduledExecutorService.shutdownNow();
     }
 
     @Test
-    void testInitWithNamesrvAddr() {
+    public void testInitWithNamesrvAddr() {
         nameserverAccessConfig = new NameserverAccessConfig("127.0.0.1:9876", "", "");
 
         mqClientAPIFactory = new MQClientAPIFactory(
@@ -66,7 +67,7 @@ class MQClientAPITest {
     }
 
     @Test
-    void testInitWithNamesrvDomain() {
+    public void testInitWithNamesrvDomain() {
         nameserverAccessConfig = new NameserverAccessConfig("", "test-domain", "");
 
         mqClientAPIFactory = new MQClientAPIFactory(
@@ -82,7 +83,7 @@ class MQClientAPITest {
     }
 
     @Test
-    void testInitThrowsExceptionWhenBothEmpty() {
+    public void testInitThrowsExceptionWhenBothEmpty() {
         nameserverAccessConfig = new NameserverAccessConfig("", "", "");
 
         RuntimeException exception = assertThrows(RuntimeException.class, () -> new MQClientAPIFactory(
@@ -98,7 +99,7 @@ class MQClientAPITest {
     }
 
     @Test
-    void testStartCreatesClients() throws Exception {
+    public void testStartCreatesClients() throws Exception {
         nameserverAccessConfig = new NameserverAccessConfig("127.0.0.1:9876", "", "");
 
         mqClientAPIFactory = new MQClientAPIFactory(
@@ -122,7 +123,7 @@ class MQClientAPITest {
     }
 
     @Test
-    void testOnNameServerAddressChangeUpdatesAllClients() throws Exception {
+    public void testOnNameServerAddressChangeUpdatesAllClients() throws Exception {
         nameserverAccessConfig = new NameserverAccessConfig("127.0.0.1:9876", "", "");
 
         mqClientAPIFactory = new MQClientAPIFactory(
@@ -141,6 +142,6 @@ class MQClientAPITest {
         MQClientAPIExt client = mqClientAPIFactory.getClient();
         List<String> nameServerAddressList = client.getNameServerAddressList();
         assertEquals(2, nameServerAddressList.size());
-        assertEquals("new-address0", nameServerAddressList.get(0));
+        assertTrue(nameServerAddressList.contains("new-address0"));
     }
 }

proxy/src/test/java/org/apache/rocketmq/proxy/service/cert/TlsCertificateManagerTest.java

@@ -16,25 +16,24 @@
  */
 package org.apache.rocketmq.proxy.service.cert;
 
-import java.io.FileWriter;
 import org.apache.rocketmq.proxy.config.ConfigurationManager;
 import org.apache.rocketmq.proxy.config.ProxyConfig;
 import org.apache.rocketmq.remoting.netty.TlsSystemConfig;
 import org.apache.rocketmq.srvutil.FileWatchService;
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
-import org.junit.jupiter.api.io.TempDir;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
 import org.mockito.Mock;
-import org.mockito.junit.jupiter.MockitoExtension;
+import org.mockito.junit.MockitoJUnitRunner;
 
 import java.io.File;
+import java.io.FileWriter;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
-import java.nio.file.Path;
 import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -49,17 +48,14 @@ import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
-@ExtendWith(MockitoExtension.class)
+@RunWith(MockitoJUnitRunner.class)
 public class TlsCertificateManagerTest {
 
-    @TempDir
-    Path tempDir;
+    @Rule
+    public TemporaryFolder tempDir = new TemporaryFolder();
 
     private TlsCertificateManager manager;
 
-    @Mock
-    private ProxyConfig proxyConfig;
-
     @Mock
     private TlsCertificateManager.TlsContextReloadListener listener1;
 
@@ -72,17 +68,13 @@ public class TlsCertificateManagerTest {
     private Field configField;
     private ProxyConfig originalConfig;
 
-    @BeforeAll
-    public static void setUpAll() throws Exception {
+    @Before
+    public void setUp() throws Exception {
         ConfigurationManager.initEnv();
         ConfigurationManager.intConfig();
-    }
-
-    @BeforeEach
-    public void setUp() throws Exception {
         // Create temporary certificate and key files
-        certFile = new File(tempDir.toFile(), "server.crt");
-        keyFile = new File(tempDir.toFile(), "server.key");
+        certFile = tempDir.newFile("server.crt");
+        keyFile = tempDir.newFile("server.key");
         try (FileWriter certWriter = new FileWriter(certFile);
              FileWriter keyWriter = new FileWriter(keyFile)) {
             certWriter.write("test certificate content");
@@ -100,7 +92,7 @@ public class TlsCertificateManagerTest {
         fileWatchListener = extractFileWatchListener(manager);
     }
 
-    @AfterEach
+    @After
     public void tearDown() throws Exception {
         // Restore the original config
         if (configField != null && originalConfig != null) {