Add test cases for OpenSergoClientManager

Signed-off-by: Eric Zhao <[email protected]>

Author: sczyh30

src/main/java/io/opensergo/OpenSergoClientManager.java

@@ -30,7 +30,7 @@ public class OpenSergoClientManager {
      */
     private final ConcurrentMap<String, OpenSergoClient> sharedClientCache = new ConcurrentHashMap<>();
 
-    private OpenSergoClientManager() {}
+    OpenSergoClientManager() {}
 
     /**
      * Get OpenSergoClientManager by DCL (Double Check Lock).
@@ -91,4 +91,9 @@ public OpenSergoClient getOrCreateClient(String host, int port, OpenSergoClientC
         }
     }
 
+    synchronized void clearAllCachedClients() {
+        // For test.
+        sharedClientCache.clear();
+    }
+
 }

src/test/java/io/opensergo/OpenSergoClientManagerTest.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2022, OpenSergo Authors
+ *
+ * Licensed 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
+ *
+ *      https://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 io.opensergo;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * @author Eric Zhao
+ */
+public class OpenSergoClientManagerTest {
+
+    @Test
+    public void testGetOrCreateClientDefault() {
+        OpenSergoClientManager manager = new OpenSergoClientManager();
+        OpenSergoClient client1 = manager.getOrCreateClient("127.0.0.1", 12345);
+        OpenSergoClient client2 = manager.getOrCreateClient("127.0.0.1", 12345);
+        OpenSergoClient client3 = manager.getOrCreateClient("1.2.3.4", 12345);
+
+        assertSame(client1, client2);
+        assertNotEquals(client1, client3);
+    }
+}