UsbPlayerTest.chooseItemTest First Case

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

@@ -12,7 +12,7 @@ public class UsbPlayer implements Device {
     private Boolean isConnected;
     private Boolean isDefect;
     int Lautstaerke = 0;
-    int soundWas =-1;
+    int soundWas = -1;
 
     public USB_Stick USBDrive = new USB_Stick();
 
@@ -104,8 +104,8 @@ public class UsbPlayer implements Device {
     //**********search method*************
     @Override
     public void quieter() {
-        if(this.soundWas == -1){
-            if (Lautstaerke > 0  ) {
+        if (this.soundWas == -1) {
+            if (Lautstaerke > 0) {
                 Lautstaerke -= 1;
             } else {
                 Lautstaerke = 0;
@@ -116,7 +116,7 @@ public class UsbPlayer implements Device {
 
     @Override
     public void louder() {
-        if(this.soundWas == -1) {
+        if (this.soundWas == -1) {
             if (Lautstaerke < 100) {
                 Lautstaerke += 1;
             } else {
@@ -126,7 +126,7 @@ public class UsbPlayer implements Device {
     }
 
     public void Louder_10() {
-        if(this.soundWas == -1) {
+        if (this.soundWas == -1) {
             Lautstaerke += 10;
             if (Lautstaerke > 100) {
                 Lautstaerke = 100;
@@ -136,7 +136,7 @@ public class UsbPlayer implements Device {
     }
 
     public void quieter_10() {
-        if(this.soundWas == -1) {
+        if (this.soundWas == -1) {
             Lautstaerke -= 10;
             if (Lautstaerke < 0) {
                 Lautstaerke = 0;
@@ -168,12 +168,11 @@ public class UsbPlayer implements Device {
 
     @Override
     public String getInfoText() {
-        String InfoText="";
+        String InfoText = "";
         if (isAllAudio()) {
-            InfoText="USB Player is on : "+this.getPlayTrack();
-        }
-        else
-            InfoText="USB Player with no Albums";
+            InfoText = "USB Player is on : " + this.getPlayTrack();
+        } else
+            InfoText = "USB Player with no Albums";
         return InfoText;
     }
 
@@ -184,8 +183,14 @@ public class UsbPlayer implements Device {
 
     @Override
     public String chooseItem(int itemNr) {
-        return null;
+        String songName="";
+        if (itemNr < this.getPlaylist().size()) {
+            songName= this.getPlaylist().get(itemNr ).toString();
         }
+        return songName;
+    }
+
+
 
     @Override
     public String[] getItemList() {

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

@@ -542,6 +542,23 @@ class UsbPlayerTest {
                 Arguments.of("The Sound is unmuted ", up1,"unmuted","Sound level has changed","previous sound level is 0")
 
         );
+    }//chooseItem
+
+    @ParameterizedTest
+    @MethodSource("chooseItem")
+    void chooseItemTest(String testName, String inputSong, String expectedResult) {
+        //int volumeNum = inputPlay.getLautstaerke();
+        assertThat(inputSong).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> chooseItem() {
+        USB_Stick USBDrive = new USB_Stick();
+        //first case
+        UsbPlayer up1 = new UsbPlayer(USBDrive);
+
+        return Stream.of(
+                Arguments.of("An Item from the Album was chosen ", up1.chooseItem(0), "Musik 01.mp3")
+        );
     }
 
 }