UsbPlayerTest.unmuteTest second Case

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

@@ -192,6 +192,7 @@ public class UsbPlayer implements Device {
     @Override
     public String unmute() {
 
+        setLautstaerke(soundWas);
         return "unmuted";
     }
 

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

@@ -458,22 +458,23 @@ class UsbPlayerTest {
 
     @ParameterizedTest
     @MethodSource("unmuteOptions")
-    void unmuteTest(String testName, UsbPlayer inputUSB, String expectedResult) {
-
+    void unmuteTest(String testName, UsbPlayer inputUSB, String expectedResult,String testName2) {
+        int prevSound = inputUSB.getLautstaerke();
         String unMuted = inputUSB.unmute();
         //first case
         assertThat(unMuted).describedAs(testName).isEqualTo(expectedResult);
+        //Second case
+        assertThat(inputUSB.getLautstaerke()).describedAs(testName2).isEqualTo(prevSound);
 
     }
 
     static Stream<Arguments> unmuteOptions() {
         USB_Stick USBDrive = new USB_Stick();
-
         UsbPlayer up1 = new UsbPlayer(USBDrive);
         up1.unmute();
 
         return Stream.of(
-                Arguments.of("The Sound is unmuted ", up1,"unmuted")
+                Arguments.of("The Sound is unmuted ", up1,"unmuted","Sound level has changed")
 
         );
     }