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

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

@@ -149,7 +149,9 @@ public class RadioPlayer implements Device {
 
     @Override
     public String getInfoText() {
-        return playedStation;
+        String infoText = playedStation;
+        if(regionPlaylist.contains(playedStation)) return ("Regional playlist " + infoText);
+        else return infoText;
     }
 
     @Override

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

@@ -378,9 +378,10 @@ class RadioPlayerTest {
     @ParameterizedTest
     @MethodSource("getInfoTextOptions")
     void testGetInfoText(String testName, String testTyp, RadioPlayer testRp, boolean expectedResult) {
-        Boolean bool;
+        Boolean bool = null;
         if(testTyp.equals("null")) bool = Strings.isNullOrEmpty(testRp.getInfoText());
-        else bool = testRp.getInfoText().contains(testRp.playedStation);
+        else if(testTyp.contains("station")) bool = testRp.getInfoText().contains(testRp.playedStation);
+        else if(testTyp.contains("region")) bool = testRp.getInfoText().contains("Regional playlist");
 
         assertThat(bool).describedAs(testName).isEqualTo(expectedResult);
     }
@@ -388,10 +389,13 @@ class RadioPlayerTest {
     static Stream<Arguments> getInfoTextOptions() {
         RadioPlayer rp = new RadioPlayer();
         RadioPlayer rp1 = new RadioPlayer();
+        RadioPlayer rp2 = new RadioPlayer();
+        rp2.changeRegion("BY");
 
         return Stream.of(
                 Arguments.of("Test for getInfoText is not empty or null", "null", rp, false),
-                Arguments.of("Test for getInfoText contains played station", "station", rp1, true)
+                Arguments.of("Test for getInfoText contains played station", "station", rp1, true),
+                Arguments.of("Test for getInfoText contains regional playlist if played station is in it", "region", rp2, true)
         );
     }
 }