UsbPlayerTest.louder_10_Test() first Case

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

@@ -104,6 +104,10 @@ public class UsbPlayer implements Device {
         }
     }
 
+    public void Louder_10(){
+        Lautstaerke += 10;
+    }
+
     @Override
     public int getVolume() {
         return 0;

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

@@ -114,7 +114,6 @@ void louderTest(String testName, UsbPlayer inputPlay, int expectedResult) {
         );
     }
 
-    ////////////////
     @ParameterizedTest
     @MethodSource("PrevOptions")
     void PrevTest(String testName, UsbPlayer inputPlay, String expectedResult) {
@@ -137,4 +136,20 @@ void louderTest(String testName, UsbPlayer inputPlay, int expectedResult) {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("louder_10_Options")
+    void louder_10_Test(String testName, UsbPlayer inputPlay, int expectedResult) {
+        int volumeNum = inputPlay.getLautstaerke();
+        assertThat(volumeNum).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> louder_10_Options() {
+        UsbPlayer up1 = new UsbPlayer();
+        up1.Louder_10();
+
+        return Stream.of(
+                Arguments.of("Volume was 0, should 10 ", up1, 10)
+        );
+    }
+
 }