BAEL-3960 (#9070)

Bael-3960, asserting log messages with junit code.

testing-modules/testing-assertions/src/main/java/com/baeldung/junit/log/BusinessWorker.java

@@ -0,0 +1,16 @@
+package com.baeldung.junit.log;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class BusinessWorker {
+    private static Logger LOGGER = LoggerFactory.getLogger(BusinessWorker.class);
+
+    public void generateLogs(String msg) {
+        LOGGER.trace(msg);
+        LOGGER.debug(msg);
+        LOGGER.info(msg);
+        LOGGER.warn(msg);
+        LOGGER.error(msg);
+    }
+}

testing-modules/testing-assertions/src/main/resources/logback.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <layout class="ch.qos.logback.classic.PatternLayout">
+            <Pattern>
+                %d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n
+            </Pattern>
+        </layout>
+    </appender>
+    <logger name="com.baeldung.junit.log" level="debug" additivity="false">
+        <appender-ref ref="CONSOLE"/>
+    </logger>
+    <root level="error">
+        <appender-ref ref="CONSOLE"/>
+    </root>
+</configuration>