added saveStation() and first test for adding station to savedPlaylist

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

@@ -11,15 +11,18 @@ public class RadioPlayer implements Device {
 
     public RadioPlayer() {
         super();
-        Playlist.add("YouFM");
-        Playlist.add("Teddy");
-        Playlist.add("MegaHits");
-        playTrack=Playlist.get(0);
+        savedPlaylist.add("YouFM");
+        savedPlaylist.add("Teddy");
+        savedPlaylist.add("MegaHits");
+        playedStation = savedPlaylist.get(0);
     }
 
-    ArrayList<String> Playlist=new ArrayList<String>();
+    ArrayList<String> savedPlaylist = new ArrayList<String>();
+    ArrayList<String> regionPlaylist = new ArrayList<String>();
     LocalDateTime now = LocalDateTime.now();
     int hour = now.getHour();
+    int Lautstaerke = 0;
+    String playedStation = "";
 
     public String getYouFMInfoByTime(int x) {
         if (x >= 5 && x < 10) return YouFMInfo[0];
@@ -57,9 +60,6 @@ public class RadioPlayer implements Device {
     String[] AntenneBYInfo = {"ANTENNE BAYERN Guten Morgen Bayern", "ANTENNE BAYERN bei der Arbeit", "ANTENNE BAYERN am Nachmittag", "ANTENNE BAYERN am Abend", "ANTENNE BAYERN Hit-Nacht"};
 
 
-    int Lautstaerke = 0;
-    String playTrack="";
-
     public void setLautstaerke(int lautstaerke) {
         Lautstaerke = lautstaerke;
     }
@@ -67,50 +67,46 @@ public class RadioPlayer implements Device {
     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);
+                regionPlaylist.clear();
+                regionPlaylist.add("Antenne Bayern");
+                regionPlaylist.add("Bayern 1");
+                regionPlaylist.add("Bayern 3");
+                regionPlaylist.add("Hit Radio N1");
+                playedStation = regionPlaylist.get(0);
                 break;
             case "HE":
-                Playlist.clear();
-                Playlist.add("Hit Radio FFH");
-                Playlist.add("HR 1");
-                Playlist.add("HR 3");
-                Playlist.add("YouFM");
-                playTrack=Playlist.get(0);
+                regionPlaylist.clear();
+                regionPlaylist.add("Hit Radio FFH");
+                regionPlaylist.add("HR 1");
+                regionPlaylist.add("HR 3");
+                regionPlaylist.add("YouFM");
+                playedStation = regionPlaylist.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);
+                regionPlaylist.clear();
+                regionPlaylist.add("DASDING");
+                regionPlaylist.add("SWR 1");
+                regionPlaylist.add("SWR 3");
+                regionPlaylist.add("sunshine live");
+                playedStation = regionPlaylist.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() {
         return Lautstaerke;
@@ -118,17 +114,19 @@ public class RadioPlayer implements Device {
 
     @Override
     public void next() {
-        int currentIndex=Playlist.indexOf(playTrack);
-        int nextIndex=(currentIndex+1)%Playlist.size();
-        playTrack=Playlist.get(nextIndex);
+        int currentIndex = savedPlaylist.indexOf(playedStation);
+        int nextIndex = (currentIndex + 1) % savedPlaylist.size();
+        playedStation = savedPlaylist.get(nextIndex);
     }
 
     @Override
     public void prev() {
-        int currentIndex=Playlist.indexOf(playTrack);
-        int nextIndex=Playlist.size()-1;
-        if(currentIndex!=0){nextIndex=(currentIndex-1);}
-        playTrack=Playlist.get(nextIndex);
+        int currentIndex = savedPlaylist.indexOf(playedStation);
+        int nextIndex = savedPlaylist.size() - 1;
+        if (currentIndex != 0) {
+            nextIndex = (currentIndex - 1);
+        }
+        playedStation = savedPlaylist.get(nextIndex);
     }
 
     @Override
@@ -149,20 +147,26 @@ public class RadioPlayer implements Device {
 
     @Override
     public String play() {
-        return ("Radio is playing station: 0"+(Playlist.indexOf(playTrack)+1)+ " "+this.playTrack);
+        return ("Radio is playing station: 0" + (savedPlaylist.indexOf(playedStation) + 1) + " " + this.playedStation);
     }
 
     public String showStationInfo() {
-        switch (playTrack) {
+        switch (playedStation) {
             case "Antenne Bayern":
                 return getAntenneBYInfoByTime(hour);
             case "YouFM":
                 return getYouFMInfoByTime(hour);
             case "Bayern 3":
                 return getBR3InfoByTime(hour);
-            default: return "";
+            default:
+                return "";
         }
 
 
     }
+
+    public String saveStation() {
+        savedPlaylist.add(playedStation);
+        return "";
+    }
 }

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

@@ -1,8 +1,6 @@
 package device.radioPlayer;
 
 
-import device.radioPlayer.RadioPlayer;
-import device.usbPlayer.UsbPlayer;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
@@ -15,7 +13,6 @@ import static org.assertj.core.api.Assertions.assertThat;
 class RadioPlayerTest {
 
 
-
     @ParameterizedTest
     @MethodSource("quieterLouderOptions")
     void quieterLouderTest(String testName, RadioPlayer testRp, int expectedResult) {
@@ -47,7 +44,7 @@ class RadioPlayerTest {
     @ParameterizedTest
     @MethodSource("changeRegionOptions")
     void changeRegionTest(String testName, RadioPlayer testRp, String expectedResult) {
-        String station = testRp.playTrack;
+        String station = testRp.playedStation;
         assertThat(station).describedAs(testName).isEqualTo(expectedResult);
     }
 
@@ -70,7 +67,7 @@ class RadioPlayerTest {
     @ParameterizedTest
     @MethodSource("prevNextOptions")
     void prevNextTest(String testName, RadioPlayer testRp, String expectedResult) {
-        String station = testRp.playTrack;
+        String station = testRp.playedStation;
         assertThat(station).describedAs(testName).isEqualTo(expectedResult);
     }
 
@@ -180,4 +177,21 @@ void testPlay(String testName, RadioPlayer testRp, String expectedResult) {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("saveStationOptions")
+    void testSaveStation(String testName, RadioPlayer testRp, String expectedResult) {
+        String savedStation = testRp.savedPlaylist.get(testRp.savedPlaylist.size() - 1);
+        assertThat(savedStation).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> saveStationOptions() {
+        RadioPlayer rp1 = new RadioPlayer();
+        rp1.changeRegion("BY");
+        rp1.saveStation();
+
+        return Stream.of(
+                Arguments.of("Test for saving station in saved playlist", rp1, "Antenne Bayern")
+        );
+    }
+
 }