USB_StickTest.ChangeAlbumTest First Case

src/main/java/device/usbPlayer/USB_Stick.java

@@ -4,36 +4,45 @@ import java.util.ArrayList;
 
 public class USB_Stick {
 
-    public ArrayList<ArrayList<String>> albums = new ArrayList<>();
+    public ArrayList<ArrayList<String>> Folders = new ArrayList<>();
+    int currentAlbum ;
 
     USB_Stick() {
         ArrayList<String> a1 = new ArrayList<String>();
         a1.add("Musik 01.mp3");
         a1.add("Musik 02.mp3");
         a1.add("Musik 03.mp3");
-       albums.add(0,a1);
+       Folders.add(0,a1);
 
         ArrayList<String> a2 = new ArrayList<String>();
         a2.add("File 01.txt");
-        a2.add("File 01.txt");
-        a2.add("File 01.txt");
-        albums.add(1,a2);
+        a2.add("File 02.txt");
+        a2.add("File 03.txt");
+        Folders.add(1,a2);
 
         ArrayList<String> a3 = new ArrayList<String>();
         a3.add("Photo 01.gif");
         a3.add("Photo 02.gif");
         a3.add("Photo 03.gif");
-        albums.add(2,a3);
+        Folders.add(2,a3);
 
         ArrayList<String> a4 = new ArrayList<String>();
         a4.add("Music 01.mp3");
         a4.add("Music 02.mp3");
         a4.add("Music 03.mp3");
-        albums.add(3,a4);
+        Folders.add(3,a4);
+
+        currentAlbum = 0;
+
+
 
     }
     public ArrayList<String> getAlbum(){
-        return albums.get(0);
+        return Folders.get(currentAlbum);
+    }
+
+    public void ChangeAlbum(){
+        ++currentAlbum;
     }
 
 }

src/test/java/device/usbPlayer/USB_StickTest.java

@@ -30,4 +30,25 @@ class USB_StickTest {
         );
     }
 
+    //ChangeAlbum
+    @ParameterizedTest
+    @MethodSource("ChangeAlbumOptions")
+    void ChangeAlbumTest(String testName, USB_Stick s) {//, int expectedResult
+        ArrayList<String> a = new ArrayList<String>();
+        a = s.getAlbum();
+
+            assertThat(a).describedAs(testName).contains("File 01.txt","File 02.txt","File 03.txt");
+    }
+
+    static Stream<Arguments> ChangeAlbumOptions() {
+        USB_Stick stick = new USB_Stick();
+        ArrayList<String> AlbumsItems = new ArrayList<>();
+        stick.ChangeAlbum();
+
+
+        return Stream.of(
+                Arguments.of("First Album is loaded", stick)//,something
+        );
+    }
+
 }