Added Log4J dependencies for testing.

src/test/java/com/example/JavaAzureAppConfigApplicationTest.java

 package com.example;
 
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import static org.junit.Assert.assertTrue;
 
-import org.junit.Test;
+public class JavaAzureAppConfigApplicationTest {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(JavaAzureAppConfigApplicationTest.class);
 
-/**
- * Unit test for simple App.
- */
-public class JavaAzureAppConfigApplicationTest
-{
-    /**
-     * Rigorous Test :-)
-     */
     @Test
-    public void shouldAnswerWithTrue()
-    {
-        assertTrue( true );
+    public void shouldAnswerWithTrue() {
+        LOGGER.info("Testing");
+        assertTrue(true);
     }
 }

src/test/resources/log4j2-test.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level [%logger{1}: %L] - %msg%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Logger name="com.example" level="debug" additivity="false">
+            <AppenderRef ref="Console"/>
+        </Logger>
+        <Root level="warn">
+            <AppenderRef ref="Console"/>
+        </Root>
+    </Loggers>
+</Configuration>
\ No newline at end of file