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

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

@@ -149,7 +149,7 @@ public class RadioPlayer implements Device {
 
     @Override
     public String getInfoText() {
-        return "InfoText";
+        return playedStation;
     }
 
     @Override

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

@@ -377,17 +377,21 @@ class RadioPlayerTest {
 
     @ParameterizedTest
     @MethodSource("getInfoTextOptions")
-    void testGetInfoText(String testName, RadioPlayer testRp, boolean expectedResult) {
-        Boolean volume = Strings.isNullOrEmpty(testRp.getInfoText());
+    void testGetInfoText(String testName, String testTyp, RadioPlayer testRp, boolean expectedResult) {
+        Boolean bool;
+        if(testTyp.equals("null")) bool = Strings.isNullOrEmpty(testRp.getInfoText());
+        else bool = testRp.getInfoText().contains(testRp.playedStation);
 
-        assertThat(volume).describedAs(testName).isEqualTo(expectedResult);
+        assertThat(bool).describedAs(testName).isEqualTo(expectedResult);
     }
 
     static Stream<Arguments> getInfoTextOptions() {
         RadioPlayer rp = new RadioPlayer();
+        RadioPlayer rp1 = new RadioPlayer();
 
         return Stream.of(
-                Arguments.of("Test for getInfoText is not empty or null", rp, false)
+                Arguments.of("Test for getInfoText is not empty or null", "null", rp, false),
+                Arguments.of("Test for getInfoText contains played station", "station", rp1, true)
         );
     }
 }