diff --git a/src/main/java/device/cdPlayer/CDPlayer.java b/src/main/java/device/cdPlayer/CDPlayer.java
index f0b82a6..b7134fa 100644
--- a/src/main/java/device/cdPlayer/CDPlayer.java
+++ b/src/main/java/device/cdPlayer/CDPlayer.java
@@ -1,7 +1,7 @@
 package device.cdPlayer;
 
 import device.Device;
-
+import device.cdPlayer.exceptions.*;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -16,8 +16,6 @@ public class CDPlayer implements Device {
 
     private String actualPlayTrack="";
     private CD loadedCD;
-    private String[] cdAlbum=new String[]{};
-
 
     @Override
     public void louder() {
@@ -70,10 +68,23 @@ public class CDPlayer implements Device {
 
     @Override
     public String play() {
+        if(isCdFlapOpen()){
+            throw new CdFlapIsOpenException();
+        }
+        else if(!isCdFlapOpen()&&getCdDriveContent()==0){
+            throw new NoCDException();
+        }
+        else if(!isCdFlapOpen()&&getCdDriveContent()==1&&!checkFormat(loadedCD.getFormat())){
+            throw new FormatNotSupportedException();
+        }
+        else if(!isCdFlapOpen()&&getCdDriveContent()==1&&checkFormat(loadedCD.getFormat())){
+            System.out.println(loadedCD.getFormat()+" "+this.actualPlayTrack+" is playing.");
+            return "AllConditionsForPlayMet";
+        }
         return null;
     }
 
-    //Getters und Setters
+    //Getters, Setters und SupportMethods
     public void setCD(CD _loadedCD) {
         loadedCD=_loadedCD;
         this.setCdDriveContent();
@@ -84,4 +95,23 @@ public class CDPlayer implements Device {
         CdDriveContent = 1;
     }
 
+    public void tapOnCdFlap(){
+        this.CdFlap+=1;
+    }
+    private boolean checkFormat(String format){
+        if(this.supportedFormats.contains(format))
+            return true;
+        else return false;
+    }
+    private int getCdDriveContent() {
+        return CdDriveContent;
+    }
+    private boolean isCdFlapOpen() {
+        if(CdFlap==1) {
+            return true;
+        }
+        else
+            return false;
+    }
+
 }
diff --git a/src/test/java/device/cdPlayer/CDPlayerTest.java b/src/test/java/device/cdPlayer/CDPlayerTest.java
index 548d937..3d651ac 100644
--- a/src/test/java/device/cdPlayer/CDPlayerTest.java
+++ b/src/test/java/device/cdPlayer/CDPlayerTest.java
@@ -1,5 +1,6 @@
 package device.cdPlayer;
 
+import device.cdPlayer.exceptions.*;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -16,37 +17,85 @@ import static org.junit.jupiter.api.Assertions.*;
 class CDPlayerTest {
 
     @ParameterizedTest
-    @MethodSource("quieterTestData")
-    void quieterTest(String testName,String testDirection, CDPlayer _cdPlayer,int anzClicks, int expectedResult) {
-        for (int i = 0; i < anzClicks; i++) {
-            _cdPlayer.quieter();
+    @MethodSource("playTestData")
+    void play(String testName, CDPlayer _cdPlayer,Exception exception , String expectedResult) {
+        if(exception!=null){
+            Exception newException=assertThrows(exception.getClass(),()->_cdPlayer.play());
+            assertEquals(expectedResult, newException.getMessage());
+        }else{
+            assertThat(_cdPlayer.play()).describedAs(testName).isEqualTo(expectedResult);
         }
+    }
+    static Stream<Arguments> playTestData () {
+        //some PlayLists
+        String[] videoPlayList=new String[]{"Video 01","Video 02","Video 03","Video 04","Video 05"};
+        String[] audioPlayList=new String[]{"Audio 01","Audio 02","Audio 03","Audio 04","Audio 05"};
+        //some CDs
+        CD videoCD1=new CD("DVD",videoPlayList);
+        CD videoCD2=new CD("Blue-ray",videoPlayList);
+        CD audioCD1=new CD("Audio",audioPlayList);
+        CD audioCD2=new CD("MP3",audioPlayList);
+        CD audioCD3=new CD("WMA",audioPlayList);
+        CD audioCD4=new CD("AAC",audioPlayList);
 
-        if(testDirection.equals("VolumeDecreased")){
-            for (int i = 0; i < 20; i++) {
-                _cdPlayer.louder();
-            }
-            for (int i = 0; i < anzClicks; i++) {
-                _cdPlayer.quieter();
-            }
-            assertThat(_cdPlayer.getVolume()).describedAs(testName).isEqualTo(expectedResult);
-        }
-        if(testDirection.equals("VolumeHasNotChanged")){
-            assertThat(_cdPlayer.getVolume()).describedAs(testName).isEqualTo(expectedResult);
-        }if(testDirection.equals("VolumeNotIncreased")){
+        //some CDPlayers
+        CDPlayer cdPlayer1=new CDPlayer();
 
-            assertThat(_cdPlayer.getVolume()).describedAs(testName).isNotEqualTo(expectedResult);
-        }
-    }
+        CDPlayer cdPlayer2=new CDPlayer();
+        cdPlayer2.tapOnCdFlap();
+        cdPlayer2.tapOnCdFlap();
+
+        CDPlayer cdPlayer3=new CDPlayer();
+        cdPlayer3.tapOnCdFlap();
+
+        CDPlayer cdPlayer4=new CDPlayer();
+        cdPlayer4.tapOnCdFlap();
+        cdPlayer4.setCD(videoCD1);
+
+        //===================================
+        CDPlayer cdPlayer5=new CDPlayer();
+        cdPlayer5.tapOnCdFlap();
+        cdPlayer5.setCD(videoCD1);
+        cdPlayer5.tapOnCdFlap();
+
+        CDPlayer cdPlayer6=new CDPlayer();
+        cdPlayer6.tapOnCdFlap();
+        cdPlayer6.setCD(videoCD2);
+        cdPlayer6.tapOnCdFlap();
+        //===================================
+
+        CDPlayer cdPlayer7=new CDPlayer();
+        cdPlayer7.tapOnCdFlap();
+        cdPlayer7.setCD(audioCD1);
+        cdPlayer7.tapOnCdFlap();
+
+        CDPlayer cdPlayer8=new CDPlayer();
+        cdPlayer8.tapOnCdFlap();
+        cdPlayer8.setCD(audioCD2);
+        cdPlayer8.tapOnCdFlap();
+
+        CDPlayer cdPlayer9=new CDPlayer();
+        cdPlayer9.tapOnCdFlap();
+        cdPlayer9.setCD(audioCD3);
+        cdPlayer9.tapOnCdFlap();
+
+        CDPlayer cdPlayer10=new CDPlayer();
+        cdPlayer10.tapOnCdFlap();
+        cdPlayer10.setCD(audioCD4);
+        cdPlayer10.tapOnCdFlap();
 
-    static Stream<Arguments> quieterTestData () {
-        CDPlayer cdPlayer=new CDPlayer();
         return Stream.of(
-                Arguments.of("[getVolume() after 20x quieter() starting by 20] => VolumeHasDecreased","VolumeDecreased", cdPlayer, 19, 1),
-                Arguments.of("[getVolume() after 20x quieter() starting by 0] => VolumeHasNotChanged","VolumeHasNotChanged" ,cdPlayer,20,0),
-                Arguments.of("[getVolume() after 5x quieter() starting by 0] => VolumeNotIncreased","VolumeNotIncreased", cdPlayer,5,5)
+                Arguments.of("[CdFlap=isClosed , CdDriveContent=>isEmpty] => NoCD", cdPlayer1, new NoCDException(), "CD must be set."),
+                Arguments.of("[CdFlap has been Opened and Closed, CdDriveContent=>isEmpty] => NoCD", cdPlayer2,new NoCDException(),"CD must be set."),
+                Arguments.of("[CdFlap=isOpen , CdDriveContent=>isEmpty] => CdFlapIsOpen", cdPlayer3,new CdFlapIsOpenException(),"Cd Flap must be closed."),
+                Arguments.of("[CdFlap=isOpen , CdDriveContent=>isSet] => CdFlapIsOpen", cdPlayer4,new CdFlapIsOpenException(),"Cd Flap must be closed."),
+                Arguments.of("[CdFlap=isClosed , CdDriveContent=>isSet, CdFormat=>DVD] => FormatNotSupported",cdPlayer5,new  FormatNotSupportedException(),"Cd-Format not supported."),
+                Arguments.of("[CdFlap=isClosed , CdDriveContent=>isSet, CdFormat=>Blue-ray] => FormatNotSupported",cdPlayer6, new  FormatNotSupportedException(),"Cd-Format not supported."),
+                Arguments.of("[CdFlap=isClosed , CdDriveContent=>isSet, CdFormat=>Audio] => AllConditionsForPlayMet", cdPlayer7,null,"AllConditionsForPlayMet"),
+                Arguments.of("[CdFlap=isClosed , CdDriveContent=>isSet, CdFormat=>MP3] => AllConditionsForPlayMet", cdPlayer8,null,"AllConditionsForPlayMet"),
+                Arguments.of("[CdFlap=isClosed , CdDriveContent=>isSet, CdFormat=>WMA] => AllConditionsForPlayMet", cdPlayer9,null,"AllConditionsForPlayMet"),
+                Arguments.of("[CdFlap=isClosed , CdDriveContent=>isSet, CdFormat=>AAC] => AllConditionsForPlayMet", cdPlayer10,null,"AllConditionsForPlayMet")
         );
     }
 
-
 }
\ No newline at end of file