Merge pull request 'implemented RadioPlayer function next & JUnit for this function' (#9) from feature-rp-next into master

src/main/java/device/RadioPlayer.java

@@ -1,7 +1,21 @@
 package device;
 
+import java.util.ArrayList;
+
 public class RadioPlayer implements Device {
 
+    public RadioPlayer() {
+        super();
+        Playlist.add("Radio YouFM");
+        Playlist.add("Radio Teddy");
+        Playlist.add("Radio MegaHits");
+        playTrack=Playlist.get(0);
+    }
+
+    ArrayList<String> Playlist=new ArrayList<String>();
+    int Lautstaerke = 0;
+    String playTrack="";
+
     public void setLautstaerke(int lautstaerke) {
         Lautstaerke = lautstaerke;
     }
@@ -10,7 +24,7 @@ public class RadioPlayer implements Device {
         return Lautstaerke;
     }
 
-    int Lautstaerke = 0;
+
     @Override
     public void louder() {
         if(Lautstaerke < 100) {
@@ -35,7 +49,9 @@ public class RadioPlayer implements Device {
 
     @Override
     public void next() {
-
+        int currentIndex=Playlist.indexOf(playTrack);
+        int nextIndex=(currentIndex+1)%Playlist.size();
+        playTrack=Playlist.get(nextIndex);
     }
 
     @Override

src/test/java/device/RadioPlayerTest.java

@@ -36,18 +36,18 @@ class RadioPlayerTest {
         assertThat(rp.getLautstaerke()).isEqualTo(0);
     }
 /*
-Test3 for Jeninks Pipeline reaction to Pull request
-hopefully last test2
-test for pr only
 
     @Test
     void getVolume() {
     }
-
+*/
     @Test
     void next() {
+        rp.next();
+        int currentIndex=rp.Playlist.indexOf(rp.playTrack);
+        assertThat(rp.playTrack).isEqualTo(rp.Playlist.get((currentIndex)%rp.Playlist.size()));
     }
-
+/*
     @Test
     void prev() {
     }