Add unit tests for SSLDebugLogger

core-java-modules/core-java-security-4/src/test/java/com/baeldung/enablessldebug/SSLDebugLoggerUnitTest.java

@@ -0,0 +1,49 @@
+package com.baeldung.enablessldebug;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintStream;
+import java.util.logging.ConsoleHandler;
+import java.util.logging.Level;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
+
+import org.junit.jupiter.api.Test;
+
+public class SSLDebugLoggerUnitTest {
+    @Test
+     void givenSSLDebuggingEnabled_whenUsingSystemProperties_thenEnableSSLDebugLogging() throws Exception {
+        ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+        System.setErr(new PrintStream(outContent));
+
+        SSLDebugLogger.enableSSLDebugUsingSystemProperties();
+        assertEquals("ssl", System.getProperty("javax.net.debug"));
+
+        SSLDebugLogger.makeHttpsRequest();
+        assertTrue(outContent.toString().contains("javax.net.ssl|DEBUG|"));
+        outContent.reset();
+
+        System.clearProperty("javax.net.debug");
+        assertNull(System.getProperty("javax.net.debug"));
+
+        SSLDebugLogger.makeHttpsRequest();
+        assertEquals(outContent.toString(),"");
+    }
+
+    @Test
+     void givenSSLDebuggingEnabled_whenUsingConfigurationFile_thenEnableSSLDebugLogging() throws IOException {
+        InputStream configFile = SSLDebugLoggerUnitTest.class.getClassLoader().getResourceAsStream("logging.properties");
+        LogManager.getLogManager().readConfiguration(configFile);
+
+        Logger sslLogger = Logger.getLogger("javax.net.ssl");
+        ConsoleHandler consoleHandler = (ConsoleHandler) sslLogger.getHandlers()[0];
+        Level consoleHandlerLevel = consoleHandler.getLevel();
+
+        assertEquals(Level.ALL, consoleHandlerLevel, "SSL ConsoleHandler level should be ALL");
+    }
+}