BordComputer.play; instance of CDPlayer -> after all preconditions ShouldReturnAnItemToPlay.

src/main/java/BordComputer.java

@@ -1,4 +1,8 @@
 import device.Device;
+import device.cdPlayer.CD;
+import device.cdPlayer.CDPlayer;
+import device.radioPlayer.RadioPlayer;
+import device.usbPlayer.UsbPlayer;
 
 import java.io.FileReader;
 import java.lang.reflect.InvocationTargetException;
@@ -35,4 +39,43 @@ public class BordComputer {
             installedDevices[i] = (Device) c.getConstructor().newInstance();
         }
     }
+
+    public String play(){
+        String itemToPlay=activeDevice.play();
+        return itemToPlay;
+    }
+
+    //===== Hilf-Funktionen ======
+
+    public Object getInstanceByName(String deviceName){
+        for (int i = 0; i <installedDevices.length ; i++) {
+            if(installedDevices[i].getClass().getSimpleName().equals(deviceName)){
+                if(deviceName.equals("CDPlayer")){
+                    return (CDPlayer)installedDevices[i];
+                }
+                if(deviceName.equals("RadioPlayer")){
+                    return (RadioPlayer)installedDevices[i];
+                }
+                if(deviceName.equals("UsbPlayer")){
+                    return (UsbPlayer)installedDevices[i];
+                }
+            }
+        }
+        return null;
+    }
+    public void meetAllPreconditionForPlay(){
+
+        String[] audioPlayList = new String[]{"Audio 01", "Audio 02", "Audio 03", "Audio 04", "Audio 05"};
+        CD audioCD1 = new CD("Audio", "PopMusic", audioPlayList, "XAc20044");
+        CD audioCD2=new CD("Audio","RockMusic",audioPlayList,"BLXPP78");
+
+        CDPlayer cdPlayer=(CDPlayer) activeDevice;
+        cdPlayer.changePlaySource();
+        cdPlayer.loadCDWechseler(audioCD1, 0);
+        cdPlayer.loadCDWechseler(audioCD2, 1);
+
+        cdPlayer.setCD(cdPlayer.getCdWechseler().getCDList().get(0));
+        activeDevice=cdPlayer;
+    }
+
 }

src/main/java/device/cdPlayer/CDPlayer.java

@@ -28,6 +28,8 @@ public class CDPlayer implements Device {
     private boolean muted=false;
     private int oldVolume=0;
 
+    private String status="";
+
     @Override
     public void louder() {
         if(volume < 100) {
@@ -138,8 +140,8 @@ public class CDPlayer implements Device {
             throw new FormatNotSupportedException();
         }
         else if(!isCdFlapOpen()&&getCdDriveContent()==1&&checkFormat(loadedCD.getFormat())){
-            System.out.println(loadedCD.getFormat()+" "+this.actualPlayTrack+" is playing.");
-            return "AllConditionsForPlayMet";
+            status="AllConditionsForPlayMet";
+            return (loadedCD.getFormat()+":"+this.actualPlayTrack+" is playing.");
         }
         return null;
     }
@@ -247,4 +249,7 @@ public class CDPlayer implements Device {
         return oldVolume;
     }
 
+    public String getStatus() {
+        return status;
+    }
 }

src/test/java/BordComputerTest.java

@@ -81,4 +81,21 @@ class BordComputerTest {
         }
         return count;
     }
+
+    @ParameterizedTest
+    @MethodSource("playDate")
+    void playTest(String testName, String testCase,BordComputer bordComputer,String instanceName) {
+            bordComputer.meetAllPreconditionForPlay();
+            assertThat(bordComputer.play()).describedAs(testName).isNotEqualTo(null);
+    }
+
+    static Stream<Arguments> playDate()throws ClassNotFoundException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
+        BordComputer bordComputer = new BordComputer();
+            bordComputer.readConfig();
+        return Stream.of(
+                Arguments.of("[CDPlayer-> play(): after all preconditions are met] => ShouldReturnAnItemToPlay","Case1",bordComputer,"CDPlayer")
+        );
+    }
+
+
 }

src/test/java/device/cdPlayer/CDPlayerTest.java

@@ -30,7 +30,8 @@ class CDPlayerTest {
             Exception newException=assertThrows(exception.getClass(),()->_cdPlayer.play());
             assertEquals(expectedResult, newException.getMessage());
         }else{
-            assertThat(_cdPlayer.play()).describedAs(testName).isEqualTo(expectedResult);
+            _cdPlayer.play();
+            assertThat(_cdPlayer.getStatus()).describedAs(testName).isEqualTo(expectedResult);
         }
     }
     static Stream<Arguments> playTestData () {