Method getInfoText of CDPlayer tested on MessageShouldContainInfoAboutAlbum.

src/main/java/device/cdPlayer/CD.java

@@ -2,6 +2,7 @@ package device.cdPlayer;
 
 public class CD {
     private String format;
+    private String albumName;
     private String[] playList;
 
     public CD() {}
@@ -30,4 +31,12 @@ public class CD {
     public void setPlayList(String[] playList) {
         this.playList = playList;
     }
+
+    public String getAlbumName() {
+        return albumName;
+    }
+
+    public void setAlbumName(String albumName) {
+        this.albumName = albumName;
+    }
 }

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

@@ -161,9 +161,12 @@ public class CDPlayer implements Device {
         return actualPlayTrack;
     }
 
-    public void setInfoText(String infoText) {
-        this.infoText=infoText;
+    public void setInfoText() {
+        this.infoText="CDPlayer: Item->"+actualPlayTrack+" from Album->"+this.loadedCD.getAlbumName()+" running.";
     }
 
 
+    public CD getCD() {
+        return this.loadedCD;
+    }
 }

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

@@ -296,6 +296,11 @@ class CDPlayerTest {
             }
             assertThat(containsInfoOfActualPlayTrack).describedAs(testName).isEqualTo(true);
         }
+        if(cases.equals("Case4")) {
+            String albumName= _cdPlayer.getCD().getAlbumName();
+            assertThat(_cdPlayer.getInfoText().contains(albumName)).describedAs(testName).isEqualTo(true);
+        }
+
     }
     static Stream<Arguments> getInfoTestData () {
         CDPlayer cdPlayer1 = new CDPlayer();
@@ -303,16 +308,18 @@ class CDPlayerTest {
         String[] audioPlayList=new String[]{"Audio 01","Audio 02","Audio 03","Audio 04","Audio 05"};
         //some CDs
         CD audioCD1=new CD("Audio",audioPlayList);
+        audioCD1.setAlbumName("Love Songs");
         CDPlayer cdPlayer2 = new CDPlayer();
         cdPlayer2.tapOnCdFlap();
         cdPlayer2.setCD(audioCD1);
         cdPlayer2.tapOnCdFlap();
-        cdPlayer2.setInfoText("CDPlayer: Item->"+cdPlayer2.getActualPlayTrack()+" from Album->"+"AlbumName"+" running.");
+        cdPlayer2.setInfoText();
 
         return Stream.of(
                 Arguments.of("[getInfoText() by infoText=null ] => shouldThrowReturnValueNullException","Case1", cdPlayer1,new ReturnValueNullException(),""),
                 Arguments.of("[getInfoText() by infoText=null ] => ExceptionShouldReturnAMessage","Case2",cdPlayer1,new ReturnValueNullException(),"Method should not return a Null-Value."),
-                Arguments.of("[getInfoText() by infoText=Message ] => MessageShouldContainInfoOfActualPlayTrack","Case3",cdPlayer2,null,"")
+                Arguments.of("[getInfoText() by infoText=Message ] => MessageShouldContainInfoOfActualPlayTrack","Case3",cdPlayer2,null,""),
+                Arguments.of("[getInfoText() by infoText=Message ] => MessageShouldContainInfoAboutAlbum","Case4",cdPlayer2,null,"")
         );
     }