USB_StickTest.getAlbumTest Second Case

src/main/java/device/usbPlayer/NoFolderFound.java

@@ -0,0 +1,8 @@
+package device.usbPlayer;
+
+public class NoFolderFound extends Exception{
+    public NoFolderFound(String message)
+    {
+        super(message);
+    }
+}

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

@@ -1,6 +1,7 @@
 package device.usbPlayer;
 
 import java.util.ArrayList;
+import device.usbPlayer.NoFolderFound;
 
 public class USB_Stick {
 
@@ -34,12 +35,21 @@ public class USB_Stick {
 
         currentAlbum = 0;
 
+    }
 
+   USB_Stick(String a){
 
     }
-    public ArrayList<String> getAlbum(){
+    public ArrayList<String> getAlbum() throws NoFolderFound{
+        if(Folders.size()==0) {
+            System.out.println("list ist leer");
+            throw new NoFolderFound("The USB Drive is empty");
+        }
+        else {
+            System.out.println("nicht leer");
             return Folders.get(currentAlbum);
         }
+    }
 
     public void ChangeAlbum(){
         ++currentAlbum;

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

@@ -69,7 +69,11 @@ public class UsbPlayer implements Device {
         Playlist.add("Musik 02.mp3");
         Playlist.add("Musik 03.mp3");
         playTrack = Playlist.get(0);*/
+        try {
             Playlist = USBDrive.getAlbum();
+        } catch (NoFolderFound e) {
+            e.printStackTrace();
+        }
         playTrack = Playlist.get(0);
 
     }

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

@@ -2,42 +2,59 @@ package device.usbPlayer;
 
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
-import org.junit.jupiter.params.provider.MethodSource;
+import org.junit.jupiter.params.provider.MethodSource;//hasMessageMatching
 
 import java.util.stream.Stream;
 import java.util.ArrayList;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThatExceptionOfType;
+import static org.assertj.core.api.AssertionsForClassTypes.catchThrowable;
+import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 class USB_StickTest {
 
     @ParameterizedTest
     @MethodSource("getAlbumOptions")
-    void getAlbumTest(String testName, ArrayList<String> album,int TestNr) {//, int expectedResult
-        //int volumeNum = inputPlay.getLautstaerke();
-        if(TestNr == 1)
-       assertThat(album).describedAs(testName).isNotEmpty();
+    void getAlbumTest(String testName, USB_Stick s, int TestNr) throws NoFolderFound {
+        ArrayList<String> album =new ArrayList<String>();
+
+        if (TestNr == 1){
+            album = s.getAlbum();
+            assertThat(album).describedAs(testName).isNotEmpty();}
+        else {
+            // when
+            Throwable thrown = catchThrowable(() -> s.getAlbum());
+
+            // then
+            assertThat(thrown)
+                    .isInstanceOf(NoFolderFound.class)
+                    .hasMessageContaining("The USB Drive is empty");
+
         }
 
-    static Stream<Arguments> getAlbumOptions() {
-        USB_Stick stick = new USB_Stick();
-        ArrayList<String> AlbumsItems = new ArrayList<>();
-        AlbumsItems= stick.getAlbum();
+    }
 
+    static Stream<Arguments> getAlbumOptions() throws NoFolderFound {
+        USB_Stick stick = new USB_Stick();
+        USB_Stick emptyStick = new USB_Stick("");
 
         return Stream.of(
-                Arguments.of("First Album is loaded", stick.getAlbum(),1)//,something
+                Arguments.of("First Album is loaded", stick, 1),
+                Arguments.of("No Album is loaded", emptyStick, 2)
         );
     }
 
     //ChangeAlbum
     @ParameterizedTest
     @MethodSource("ChangeAlbumOptions")
-    void ChangeAlbumTest(String testName, USB_Stick s) {//, int expectedResult
+    void ChangeAlbumTest(String testName, USB_Stick s) throws NoFolderFound {
         ArrayList<String> a = new ArrayList<String>();
         a = s.getAlbum();
 
-            assertThat(a).describedAs(testName).contains("File 01.txt","File 02.txt","File 03.txt");
+        assertThat(a).describedAs(testName).contains("File 01.txt", "File 02.txt", "File 03.txt");
     }
 
     static Stream<Arguments> ChangeAlbumOptions() {