added sevens test case for getInfoText() & and added productive code for RadioPlayer

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

@@ -149,6 +149,10 @@ public class RadioPlayer implements Device {
 
     @Override
     public String getInfoText() {
+        return (buildInfoText() + "\n Now playing: " + showStationInfo());
+    }
+
+    private String buildInfoText() {
         String infoText = playedStation;
         if(regionPlaylist.contains(playedStation)) return ("Regional playlist: " + (regionPlaylist.indexOf(playedStation) + 1) + infoText);
         else return ("Saved playlist: " + (savedPlaylist.indexOf(playedStation) + 1) + infoText);

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

@@ -385,6 +385,7 @@ class RadioPlayerTest {
         else if(testTyp.contains("saved")) bool = testRp.getInfoText().contains("Saved playlist");
         else if(testTyp.contains("savedNum")) bool = testRp.getInfoText().contains(("0") + testRp.savedPlaylist.indexOf(testRp.playedStation) + 1);
         else if(testTyp.contains("regionNum")) bool = testRp.getInfoText().contains(("0") + testRp.regionPlaylist.indexOf(testRp.playedStation) + 1);
+        else if(testTyp.contains("stationInfo")) bool = testRp.getInfoText().contains("Now playing");
 
         assertThat(bool).describedAs(testName).isEqualTo(expectedResult);
     }
@@ -400,6 +401,8 @@ class RadioPlayerTest {
         RadioPlayer rp5 = new RadioPlayer();
         rp5.changeRegion("HE");
         rp5.next();
+        RadioPlayer rp6 = new RadioPlayer();
+        rp6.changeRegion("BY");
 
         return Stream.of(
                 Arguments.of("Test for getInfoText is not empty or null", "null", rp, false),
@@ -407,7 +410,8 @@ class RadioPlayerTest {
                 Arguments.of("Test for getInfoText contains regional playlist if played station is in it", "region", rp2, true),
                 Arguments.of("Test for getInfoText contains saved playlist if played station is in it", "saved", rp3, true),
                 Arguments.of("Test for getInfoText contains station number in saved playlist", "savedNum", rp4, true),
-                Arguments.of("Test for getInfoText contains station number in regional playlist", "regionNum", rp5, true)
+                Arguments.of("Test for getInfoText contains station number in regional playlist", "regionNum", rp5, true),
+                Arguments.of("Test for getInfoText contains station info if station has one", "stationInfo", rp6, true)
         );
     }
 }