UsbPlayerTest.chooseItemTest First Case

src/main/java/device/usbPlayer/UsbPlayer.java

@@ -171,8 +171,7 @@ public class UsbPlayer implements Device {
         String InfoText = "";
         if (isAllAudio()) {
             InfoText = "USB Player is on : " + this.getPlayTrack();
-        }
-        else
+        } else
             InfoText = "USB Player with no Albums";
         return InfoText;
     }
@@ -184,8 +183,14 @@ public class UsbPlayer implements Device {
 
     @Override
     public String chooseItem(int itemNr) {
-        return null;
+        String songName="";
+        if (itemNr < this.getPlaylist().size()) {
+            songName= this.getPlaylist().get(itemNr ).toString();
         }
+        return songName;
+    }
+
+
 
     @Override
     public String[] getItemList() {

src/test/java/device/usbPlayer/UsbPlayerTest.java

@@ -542,6 +542,23 @@ class UsbPlayerTest {
                 Arguments.of("The Sound is unmuted ", up1,"unmuted","Sound level has changed","previous sound level is 0")
 
         );
+    }//chooseItem
+
+    @ParameterizedTest
+    @MethodSource("chooseItem")
+    void chooseItemTest(String testName, String inputSong, String expectedResult) {
+        //int volumeNum = inputPlay.getLautstaerke();
+        assertThat(inputSong).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> chooseItem() {
+        USB_Stick USBDrive = new USB_Stick();
+        //first case
+        UsbPlayer up1 = new UsbPlayer(USBDrive);
+
+        return Stream.of(
+                Arguments.of("An Item from the Album was chosen ", up1.chooseItem(0), "Musik 01.mp3")
+        );
     }
 
 }