Test+Productive code for case:3 of method-test next created.

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

@@ -44,8 +44,10 @@ public class CDPlayer implements Device {
     public void next() {
         List<String> playList =  Arrays.asList(loadedCD.getPlayList());
         int indexOfActualPlayTrack=playList.indexOf(actualPlayTrack);
-
-        this.actualPlayTrack=playList.get(indexOfActualPlayTrack +1);
+        int indexOfNextPlayTrack=(indexOfActualPlayTrack+1)%loadedCD.getPlayList().length;
+        //System.out.println("actualIndex= "+indexOfActualPlayTrack);
+        this.actualPlayTrack=playList.get(indexOfNextPlayTrack );
+        //System.out.println("nextSong= "+actualPlayTrack);
     }
 
     @Override
@@ -65,7 +67,7 @@ public class CDPlayer implements Device {
 
     @Override
     public String[] getItemList() {
-        return new String[0];
+        return loadedCD.getPlayList();
     }
 
 

src/main/java/device/radioPlayer/RadioPlayer.java

@@ -8,13 +8,14 @@ public class RadioPlayer implements Device {
 
     public RadioPlayer() {
         super();
-        Playlist.add("Radio YouFM");
-        Playlist.add("Radio Teddy");
-        Playlist.add("Radio MegaHits");
+        Playlist.add("YouFM");
+        Playlist.add("Teddy");
+        Playlist.add("MegaHits");
         playTrack=Playlist.get(0);
     }
 
     ArrayList<String> Playlist=new ArrayList<String>();
+
     int Lautstaerke = 0;
     String playTrack="";
 
@@ -26,23 +27,52 @@ public class RadioPlayer implements Device {
         return Lautstaerke;
     }
 
+    public void changeRegion(String region){
+        switch (region) {
+            case "BY":
+                Playlist.clear();
+                Playlist.add("Antenne Bayern");
+                Playlist.add("Bayern 1");
+                Playlist.add("Bayern 3");
+                Playlist.add("Hit Radio N1");
+                playTrack=Playlist.get(0);
+                break;
+            case "HE":
+                Playlist.clear();
+                Playlist.add("Hit Radio FFH");
+                Playlist.add("HR 1");
+                Playlist.add("HR 3");
+                Playlist.add("You FM");
+                playTrack=Playlist.get(0);
+                break;
+            case "BW":
+                Playlist.clear();
+                Playlist.add("DASDING");
+                Playlist.add("SWR 1");
+                Playlist.add("SWR 3");
+                Playlist.add("sunshine live");
+                playTrack=Playlist.get(0);
+                break;
+            default:
+                Playlist.clear();
+                Playlist.add("YouFM");
+                Playlist.add("Teddy");
+                Playlist.add("MegaHits");
+                playTrack=Playlist.get(0);
+                break;
+        }
+    }
 
     @Override
     public void louder() {
-        if(Lautstaerke < 100) {
-            Lautstaerke += 1;
-        } else {
-            Lautstaerke = 100;
-        }
+        if(Lautstaerke < 100){Lautstaerke+=1;}
+        else Lautstaerke = 100;
     }
 
     @Override
     public void quieter() {
-        if(Lautstaerke > 0) {
-			Lautstaerke -= 1;
-		} else {
-			Lautstaerke = 0;
-		}
+        if(Lautstaerke > 0){Lautstaerke-=1;}
+        else Lautstaerke = 0;
     }
     @Override
     public int getVolume() {

src/main/java/device/usbPlayer/UsbPlayer.java

@@ -111,12 +111,19 @@ public class UsbPlayer implements Device {
 
     @Override
     public void next() {
-
+        int currentIdex = Playlist.indexOf(playTrack);
+        int nextIndex = (currentIdex + 1) % Playlist.size();
+        playTrack = Playlist.get(nextIndex);
     }
 
     @Override
     public void prev() {
-
+        int currentIdex = Playlist.indexOf(playTrack);
+        int nextIndex = Playlist.size() - 1;
+        if (currentIdex != 0) {
+            nextIndex = (currentIdex - 1);
+        }
+        playTrack = Playlist.get(nextIndex);
     }
 
     @Override

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

@@ -156,10 +156,17 @@ class CDPlayerTest {
     @ParameterizedTest
     @MethodSource("nextTestData")
     void nextTest(String testName,String testDirection, CDPlayer _cdPlayer,int anzClicks, String expectedResult){
+
+        if(testDirection.equals("SecondSongSelected")|| testDirection.equals("ThirdSongSelected")){
             for (int i = 0; i < anzClicks; i++) {
                 _cdPlayer.next();
             }
-        if(testDirection.equals("SecondSongSelected")){
+            assertThat(_cdPlayer.getActualPlayTrack()).describedAs(testName).isEqualTo(expectedResult);
+        }
+        if(testDirection.equals("FirstSongSelected")){
+            for (int i = 0; i <anzClicks; i++) {
+                _cdPlayer.next();
+            }
             assertThat(_cdPlayer.getActualPlayTrack()).describedAs(testName).isEqualTo(expectedResult);
         }
     }
@@ -168,13 +175,25 @@ class CDPlayerTest {
         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();
+        CDPlayer cdPlayer1=new CDPlayer();
+        cdPlayer1.tapOnCdFlap();
+        cdPlayer1.setCD(audioCD);
+        cdPlayer1.tapOnCdFlap();
+
+        CDPlayer cdPlayer2=new CDPlayer();
+        cdPlayer2.tapOnCdFlap();
+        cdPlayer2.setCD(audioCD);
+        cdPlayer2.tapOnCdFlap();
+
+        CDPlayer cdPlayer3=new CDPlayer();
+        cdPlayer3.tapOnCdFlap();
+        cdPlayer3.setCD(audioCD);
+        cdPlayer3.tapOnCdFlap();
 
         return Stream.of(
-                Arguments.of("[getActualPlayTrack() after 1x next() starting by firstSong] => SecondSongSelected","SecondSongSelected", cdPlayer, 1, cdPlayer.getSongByNumber(1))
+                Arguments.of("[getActualPlayTrack() after 1x next() starting by firstSong] => SecondSongSelected","SecondSongSelected", cdPlayer1, 1, cdPlayer1.getSongByNumber(1)),
+                Arguments.of("[getActualPlayTrack() after 2x next() starting by firstSong] => ThirdSongSelected","ThirdSongSelected" ,cdPlayer2,2,cdPlayer2.getSongByNumber(2)),
+                Arguments.of("[getActualPlayTrack() after 1x next() starting by lastSong] => FirstSongSelected","FirstSongSelected", cdPlayer3,cdPlayer3.getItemList().length,cdPlayer3.getSongByNumber(0))
         );
     }
 

src/test/java/device/radioPlayer/RadioPlayerTest.java

@@ -16,35 +16,58 @@ class RadioPlayerTest {
 
     RadioPlayer rp = new RadioPlayer();
 
-
-    @Test
-    void louder() {
-        rp.setLautstaerke(0);
-        rp.louder();
-        assertThat(rp.getLautstaerke()).isEqualTo(1);
+    @ParameterizedTest
+    @MethodSource("quieterLouderOptions")
+    void quieterLouderTest(String testName, RadioPlayer testRp, int expectedResult) {
+        int volume = testRp.getLautstaerke();
+        assertThat(volume).describedAs(testName).isEqualTo(expectedResult);
     }
 
-    @Test
-    void louderMax() {
-        rp.setLautstaerke(100);
-        rp.louder();
-        assertThat(rp.getLautstaerke()).isEqualTo(100);
+    static Stream<Arguments> quieterLouderOptions() {
+        RadioPlayer rp1 = new RadioPlayer();
+        RadioPlayer rp2 = new RadioPlayer();
+        RadioPlayer rp3 = new RadioPlayer();
+        RadioPlayer rp4 = new RadioPlayer();
+        rp1.setLautstaerke(0);
+        rp1.louder();
+        rp2.setLautstaerke(100);
+        rp2.louder();
+        rp3.setLautstaerke(1);
+        rp3.quieter();
+        rp4.setLautstaerke(0);
+        rp4.quieter();
+        return Stream.of(
+                Arguments.of("Test for one step louder", rp1, 1),
+                Arguments.of("Test for max louder", rp2, 100),
+                Arguments.of("Test for one step quieter", rp3, 0),
+                Arguments.of("Test for min quieter", rp4, 0)
+        );
     }
 
-    @Test
-    void quieter() {
-        rp.setLautstaerke(1);
-        rp.quieter();
-        assertThat(rp.getLautstaerke()).isEqualTo(0);
+    @ParameterizedTest
+    @MethodSource("changeRegionOptions")
+    void changeRegionTest(String testName, RadioPlayer testRp, String expectedResult) {
+        String station = testRp.playTrack;
+        assertThat(station).describedAs(testName).isEqualTo(expectedResult);
     }
-    @Test
-    void quieterMax() {
-        rp.setLautstaerke(0);
-        rp.quieter();
-        assertThat(rp.getLautstaerke()).isEqualTo(0);
+
+    static Stream<Arguments> changeRegionOptions() {
+        RadioPlayer rp1 = new RadioPlayer();
+        RadioPlayer rp2 = new RadioPlayer();
+        RadioPlayer rp3 = new RadioPlayer();
+        rp1.changeRegion("BY");
+        rp2.changeRegion("HE");
+        rp3.changeRegion("BW");
+
+        return Stream.of(
+                Arguments.of("Test change Region to Bayern", rp1, "Antenne Bayern"),
+                Arguments.of("Test change Region to Hessen", rp2, "Hit Radio FFH"),
+                Arguments.of("Test change Region to Baden-Wuerttemberg", rp3, "DASDING")
+        );
     }
+
+
 /*
-    Jenkins config test
     @Test
     void getVolume() {
     }
@@ -66,9 +89,9 @@ class RadioPlayerTest {
         rp2.prev();
         rp3.prev();
         return Stream.of(
-                Arguments.of("Next Station Test", rp1, "Radio Teddy"),
-                Arguments.of("Prev Station Test", rp2, "Radio YouFM"),
-                Arguments.of("Prev works on first Station ", rp3, "Radio MegaHits")
+                Arguments.of("Next Station Test", rp1, "Teddy"),
+                Arguments.of("Prev Station Test", rp2, "YouFM"),
+                Arguments.of("Prev works on first Station ", rp3, "MegaHits")
         );
     }
 

src/test/java/device/usbPlayer/UsbPlayerTest.java

@@ -86,4 +86,55 @@ void louderTest(String testName, UsbPlayer inputPlay, int expectedResult) {
         );
     }
 
+
+    @ParameterizedTest
+    @MethodSource("NextOptions")
+    void NextTest(String testName, UsbPlayer inputPlay, String expectedResult) {
+        String current_Track = inputPlay.getPlayTrack();
+        assertThat(current_Track).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> NextOptions() {
+        UsbPlayer up1 = new UsbPlayer();
+        up1.next();
+        UsbPlayer up2 = new UsbPlayer();
+        for (int i = 1; i < up2.getPlaylist().size(); i++) {
+            up2.next();
+        }
+        UsbPlayer up3 = new UsbPlayer();
+        for (int i = 1; i < up3.getPlaylist().size(); i++) {
+            up3.next();
+        }
+        up3.next();
+        return Stream.of(
+                Arguments.of("Second-Song : Musik 02.mp3 ", up1, "Musik 02.mp3"),
+                Arguments.of("Last-Song : Musik 03.mp3  ", up2, "Musik 03.mp3"),
+                Arguments.of("From last to first Song : Musik 01.mp3  ", up3, "Musik 01.mp3")
+
+        );
+    }
+
+    ////////////////
+    @ParameterizedTest
+    @MethodSource("PrevOptions")
+    void PrevTest(String testName, UsbPlayer inputPlay, String expectedResult) {
+        String current_Track = inputPlay.getPlayTrack();
+        assertThat(current_Track).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> PrevOptions() {
+        UsbPlayer up1 = new UsbPlayer();
+        up1.prev();
+        UsbPlayer up2 = new UsbPlayer();
+        for (int i = 1; i < up2.getPlaylist().size(); i++) {//3
+            up2.prev();
+        }
+
+
+        return Stream.of(
+                Arguments.of("From first-Song to last-Song : Musik 03.mp3 ", up1, "Musik 03.mp3"),
+                Arguments.of("From first-Song to second-Song(Backward) : Musik 02.mp3 ", up2, "Musik 02.mp3")
+        );
+    }
+
 }