Asserting the Received Messages

logging-modules/logback/src/test/java/com/baeldung/logback/MapAppenderIntegrationTest.java

@@ -1,33 +1,40 @@
 package com.baeldung.logback;
 
 import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.spi.ILoggingEvent;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.LoggerFactory;
 
+import java.util.List;
+
+import static java.util.stream.Collectors.toList;
+import static org.hamcrest.Matchers.hasItems;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
 
 public class MapAppenderIntegrationTest {
 
     private Logger rootLogger;
 
     @Before
-    public void setUp() throws Exception {
+    public void setUp() {
         rootLogger = (Logger) LoggerFactory.getLogger("ROOT");
     }
 
     @Test
-    public void whenLoggerEmitsLoggingEvent_thenAppenderReceivesEvent() throws Exception {
+    public void whenLoggerEmitsLoggingEvent_thenAppenderReceivesEvent() {
         rootLogger.info("Test from {}", this.getClass().getSimpleName());
         MapAppender appender = (MapAppender) rootLogger.getAppender("map");
-        assertEquals(appender.getEventMap().size(), 1);
+
+        List<String> messages = appender.getEventMap().values().stream().map(ILoggingEvent::getMessage).collect(toList());
+        assertThat(messages, hasItems("Test from {}"));
     }
 
     @Test
-    public void givenNoPrefixSet_whenLoggerEmitsEvent_thenAppenderReceivesNoEvent() throws Exception {
+    public void givenNoPrefixSet_whenLoggerEmitsEvent_thenAppenderReceivesNoEvent() {
         rootLogger.info("Test from {}", this.getClass().getSimpleName());
         MapAppender appender = (MapAppender) rootLogger.getAppender("badMap");
         assertEquals(appender.getEventMap().size(), 0);
     }
-
 }