added showStationInfo() & first test case

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

@@ -155,4 +155,8 @@ public class RadioPlayer implements Device {
     public String play() {
         return null;
     }
+
+    public String showStationInfo() {
+        return getYouFMInfoByTime(hour);
+    }
 }

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

@@ -131,6 +131,20 @@ class RadioPlayerTest {
         assertThat(rp.getBR3InfoByTime(21)).describedAs("BR3 info by Time at 21.00").isEqualTo("Matuschke - der etwas andere Abend");
     }
 
+    @ParameterizedTest
+    @MethodSource("showStationInfoOptions")
+    void showStationInfo(String testName, RadioPlayer testRp, String expectedResult) {
+        String info = testRp.showStationInfo();
+        assertThat(info).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> showStationInfoOptions() {
+        RadioPlayer rp1 = new RadioPlayer();
+
+        return Stream.of(
+                Arguments.of("Show Station Info for first saved Radio", rp1, rp1.getYouFMInfoByTime(rp1.hour))
+        );
+    }
 
 /*