Add comprehensive unit tests for CSConnectionPool and CSConnectionRequest classes

Author: harshithad0703

src/test/java/com/contentstack/sdk/TestCSConnectionPool.java

@@ -0,0 +1,89 @@
+package com.contentstack.sdk;
+
+import okhttp3.ConnectionPool;
+import org.junit.jupiter.api.Test;
+import java.util.concurrent.TimeUnit;
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * Unit tests for CSConnectionPool class.
+ * Tests connection pool creation with various configurations.
+ */
+public class TestCSConnectionPool {
+
+    @Test
+    void testCreateDefaultConnectionPool() {
+        CSConnectionPool csConnectionPool = new CSConnectionPool();
+        ConnectionPool pool = csConnectionPool.create();
+        
+        assertNotNull(pool);
+    }
+
+    @Test
+    void testCreateConnectionPoolWithParameters() {
+        CSConnectionPool csConnectionPool = new CSConnectionPool();
+        int maxIdleConnections = 5;
+        long keepAliveDuration = 300;
+        TimeUnit timeUnit = TimeUnit.SECONDS;
+        
+        ConnectionPool pool = csConnectionPool.create(maxIdleConnections, keepAliveDuration, timeUnit);
+        
+        assertNotNull(pool);
+    }
+
+    @Test
+    void testCreateConnectionPoolWithMinimalParameters() {
+        CSConnectionPool csConnectionPool = new CSConnectionPool();
+        ConnectionPool pool = csConnectionPool.create(1, 1, TimeUnit.MILLISECONDS);
+        
+        assertNotNull(pool);
+    }
+
+    @Test
+    void testCreateConnectionPoolWithLargeValues() {
+        CSConnectionPool csConnectionPool = new CSConnectionPool();
+        ConnectionPool pool = csConnectionPool.create(100, 3600, TimeUnit.SECONDS);
+        
+        assertNotNull(pool);
+    }
+
+    @Test
+    void testCreateConnectionPoolWithDifferentTimeUnits() {
+        CSConnectionPool csConnectionPool = new CSConnectionPool();
+        
+        ConnectionPool poolSeconds = csConnectionPool.create(5, 60, TimeUnit.SECONDS);
+        assertNotNull(poolSeconds);
+        
+        ConnectionPool poolMinutes = csConnectionPool.create(5, 5, TimeUnit.MINUTES);
+        assertNotNull(poolMinutes);
+        
+        ConnectionPool poolHours = csConnectionPool.create(5, 1, TimeUnit.HOURS);
+        assertNotNull(poolHours);
+    }
+
+    @Test
+    void testMultipleConnectionPoolCreation() {
+        CSConnectionPool csConnectionPool = new CSConnectionPool();
+        
+        ConnectionPool pool1 = csConnectionPool.create();
+        ConnectionPool pool2 = csConnectionPool.create();
+        ConnectionPool pool3 = csConnectionPool.create(10, 300, TimeUnit.SECONDS);
+        
+        assertNotNull(pool1);
+        assertNotNull(pool2);
+        assertNotNull(pool3);
+        assertNotSame(pool1, pool2);
+        assertNotSame(pool2, pool3);
+    }
+
+    @Test
+    void testCSConnectionPoolInstantiation() {
+        CSConnectionPool csConnectionPool1 = new CSConnectionPool();
+        CSConnectionPool csConnectionPool2 = new CSConnectionPool();
+        
+        assertNotNull(csConnectionPool1);
+        assertNotNull(csConnectionPool2);
+        assertNotSame(csConnectionPool1, csConnectionPool2);
+    }
+}
+