PrevTest in UsbPlayerTest.java

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

@@ -114,4 +114,21 @@ void louderTest(String testName, UsbPlayer inputPlay, int expectedResult) {
         );
     }
 
+    ////////////////
+    @ParameterizedTest
+    @MethodSource("PrevOptions")
+    void PrevTest(String testName, UsbPlayer inputPlay, String expectedResult) {
+        String current_Track = inputPlay.getPlayTrack();
+        assertThat(current_Track).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> PrevOptions() {
+        UsbPlayer up1 = new UsbPlayer();
+        up1.prev();
+
+        return Stream.of(
+                Arguments.of("From first-Song to last-Song : Musik 03.mp3 ", up1, "Musik 03.mp3")
+        );
+    }
+
 }