BAEL-9268: Add integration test for determining JVM keystore location (#18955)

* BAEL-9268: Add integration test for determining JVM keystore location

* fix to follows guidelines.

* BAEL-9268: Replace System.out with Logger and remove imports

* Corrections: imports and logger

Author: THEJOHNCALEB

core-java-modules/core-java-security/src/test/java/com/baeldung/keystore/KeystoreLocatorIntegrationTest.java

@@ -0,0 +1,46 @@
+package com.baeldung.keystore;
+
+import java.io.File;
+
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class KeystoreLocatorIntegrationTest {
+
+    private static final Logger logger = LoggerFactory.getLogger(KeystoreLocatorIntegrationTest.class);
+    
+    @Test
+    void givenJavaInstallation_whenUsingSystemProperties_thenKeystoreLocationFound() {
+        String javaHome = System.getProperty("java.home");
+        String separator = System.getProperty("file.separator");
+        
+        String cacertsPath = javaHome + separator + "lib" + separator 
+          + "security" + separator + "cacerts";
+        
+        assertNotNull(javaHome);
+        logger.info("Java Home: {}", javaHome);
+        logger.info("Expected cacerts location: {}", cacertsPath);
+        
+        File cacertsFile = new File(cacertsPath);
+        if (cacertsFile.exists()) {
+            logger.info("Cacerts file exists: YES");
+            logger.info("Absolute path: {}", cacertsFile.getAbsolutePath());
+            assertTrue(cacertsFile.exists());
+        }
+        
+        String customTrustStore = System.getProperty("javax.net.ssl.trustStore");
+        if (customTrustStore != null) {
+            logger.info("Custom trustStore is specified: {}", customTrustStore);
+        } else {
+            logger.info("No custom trustStore specified, using default");
+        }
+        
+        String userHome = System.getProperty("user.home");
+        String userKeystore = userHome + separator + ".keystore";
+        assertNotNull(userHome);
+        logger.info("User keystore location: {}", userKeystore);
+    }
+}