UsbPlayerTest.unmuteTest first Case

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

@@ -191,7 +191,8 @@ public class UsbPlayer implements Device {
 
     @Override
     public String unmute() {
-        return null;
+
+        return "unmuted";
     }
 
 

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

@@ -447,15 +447,35 @@ class UsbPlayerTest {
     static Stream<Arguments> muteOptions() {
         USB_Stick USBDrive = new USB_Stick();
 
-        //first case
         UsbPlayer up1 = new UsbPlayer(USBDrive);
         up1.mute();
 
-
         return Stream.of(
                 Arguments.of("The Sound is muted ", up1,"muted","Sound level is 0","previous sound level is saved ")
 
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("unmuteOptions")
+    void unmuteTest(String testName, UsbPlayer inputUSB, String expectedResult) {
+
+        String unMuted = inputUSB.unmute();
+        //first case
+        assertThat(unMuted).describedAs(testName).isEqualTo(expectedResult);
+
+    }
+
+    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")
+
+        );
+    }
+
 }