Base-Test for method next created.

src/main/java/device/cdPlayer/CDPlayer.java

@@ -114,4 +114,12 @@ public class CDPlayer implements Device {
             return false;
     }
 
+    public String getSongByNumber(int songNr){
+        return "";
+    }
+
+    public String getActualPlayTrack() {
+        return actualPlayTrack;
+    }
+
 }

src/test/java/device/cdPlayer/CDPlayerTest.java

@@ -153,4 +153,29 @@ class CDPlayerTest {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("nextTestData")
+    void nextTest(String testName,String testDirection, CDPlayer _cdPlayer,int anzClicks, String expectedResult){
+        for (int i = 0; i < anzClicks; i++) {
+            _cdPlayer.next();
+        }
+        if(testDirection.equals("SecondSongSelected")){
+            assertThat(_cdPlayer.getActualPlayTrack()).describedAs(testName).isEqualTo(expectedResult);
+        }
+    }
+    static Stream<Arguments> nextTestData () {
+
+        String[] audioPlayList=new String[]{"Audio 01","Audio 02","Audio 03","Audio 04","Audio 05"};
+        CD audioCD=new CD("Audio",audioPlayList);
+
+        CDPlayer cdPlayer=new CDPlayer();
+        cdPlayer.tapOnCdFlap();
+        cdPlayer.setCD(audioCD);
+        cdPlayer.tapOnCdFlap();
+
+        return Stream.of(
+                Arguments.of("[getActualPlayTrack() after 1x next() starting by firstSong] => SecondSongSelected","SecondSongSelected", cdPlayer, 1, cdPlayer.getSongByNumber(1))
+        );
+    }
+
 }