UsbPlayerTest.louder_10_Test Fifth Case

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

@@ -202,12 +202,19 @@ class UsbPlayerTest {
         up4.setLautstaerke(10);
         up4.mute();
         up4.Louder_10();
+        //fifth case
+        UsbPlayer up5 = new UsbPlayer(USBDrive);
+        up5.setLautstaerke(10);
+        up5.mute();
+        up5.unmute();
+        up5.Louder_10();
 
         return Stream.of(
                 Arguments.of("Volume was 0, should be 10 ", up1, 10),
                 Arguments.of("Volume was 0, should be 30 ", up2, 30),
                 Arguments.of("Volume was 100, should stay 100 ", up3, 100),
-                Arguments.of("Volume is muted,no change can be made ", up4, 0)
+                Arguments.of("Volume is muted,no change can be made ", up4, 0),
+                Arguments.of("Volume is unmuted,a change has been made ", up5, 20)
         );
     }