Merge commit 'dff29bea43d8fa550cb061fe11dbc1d095eecd6d' into HEAD

src/main/java/device/cdPlayer/CD.java

@@ -2,6 +2,7 @@ package device.cdPlayer;
 
 public class CD {
     private String format;
+    private String albumName;
     private String[] playList;
 
     public CD() {}
@@ -30,4 +31,12 @@ public class CD {
     public void setPlayList(String[] playList) {
         this.playList = playList;
     }
+
+    public String getAlbumName() {
+        return albumName;
+    }
+
+    public void setAlbumName(String albumName) {
+        this.albumName = albumName;
+    }
 }

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

@@ -14,6 +14,7 @@ public class CDPlayer implements Device {
     private int CdDriveContent=0;
     private int CdFlap=0;
     private int volume = 0;
+    private String infoText=null;
     private List<String> supportedFormats = new ArrayList<String>(Arrays.asList(new String[] {"Audio","MP3","WMA","AAC"}));
 
     private String actualPlayTrack="";
@@ -66,7 +67,10 @@ public class CDPlayer implements Device {
 
     @Override
     public String getInfoText() {
-        return null;
+        if(infoText==null){
+            throw new ReturnValueNullException();
+        }
+        return infoText;
     }
 
     @Override
@@ -157,4 +161,12 @@ public class CDPlayer implements Device {
         return actualPlayTrack;
     }
 
+    public void setInfoText() {
+        this.infoText=this.getClass().getSimpleName()+": Item->"+actualPlayTrack+" from Album->"+this.loadedCD.getAlbumName()+" running.";
+    }
+
+
+    public CD getCD() {
+        return this.loadedCD;
+    }
 }

src/main/java/device/cdPlayer/exceptions/ReturnValueNullException.java

@@ -0,0 +1,9 @@
+package device.cdPlayer.exceptions;
+
+public class ReturnValueNullException extends RuntimeException{
+
+    public ReturnValueNullException() {
+        super("Method should not return a Null-Value.");
+    }
+
+}

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

@@ -7,6 +7,7 @@ import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.mockito.Mockito;
 import org.mockito.junit.jupiter.MockitoExtension;
 
 import java.lang.reflect.Method;
@@ -17,6 +18,8 @@ import java.util.stream.Stream;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.when;
+
 @ExtendWith(MockitoExtension.class)
 class CDPlayerTest {
 
@@ -272,4 +275,56 @@ class CDPlayerTest {
         assertThat(volumeIstInValueRange).isEqualTo(true);
     }
 
+    @ParameterizedTest
+    @MethodSource("getInfoTestData")
+    void getInfoTest(String testName,String cases, CDPlayer _cdPlayer,Exception exception , String expectedResult){
+
+        if(cases.equals("Case1")) {
+            Exception newException = assertThrows(exception.getClass(), () -> _cdPlayer.getInfoText());
+            assertEquals(ReturnValueNullException.class, newException.getClass());
+        }
+        if(cases.equals("Case2")) {
+            Exception newException = assertThrows(exception.getClass(), () -> _cdPlayer.getInfoText());
+            assertThat(newException.getMessage()).describedAs(testName).isEqualTo(expectedResult);
+        }
+        if(cases.equals("Case3")) {
+           String[] album= _cdPlayer.getItemList();
+           boolean containsInfoOfActualPlayTrack=false;
+            for (int i = 0; i < album.length; i++) {
+                if(_cdPlayer.getInfoText().contains(expectedResult))
+                    containsInfoOfActualPlayTrack=true;
+            }
+            assertThat(containsInfoOfActualPlayTrack).describedAs(testName).isEqualTo(true);
+        }
+        if(cases.equals("Case4")) {
+            String albumName= _cdPlayer.getCD().getAlbumName();
+            assertThat(_cdPlayer.getInfoText().contains(albumName)).describedAs(testName).isEqualTo(true);
+        }
+        if(cases.equals("Case5")) {
+            assertThat(_cdPlayer.getInfoText().contains("CDPlayer")).describedAs(testName).isEqualTo(true);
+        }
+
+    }
+    static Stream<Arguments> getInfoTestData () {
+        CDPlayer cdPlayer1 = new CDPlayer();
+
+        String[] audioPlayList=new String[]{"Audio 01","Audio 02","Audio 03","Audio 04","Audio 05"};
+        //some CDs
+        CD audioCD1=new CD("Audio",audioPlayList);
+        audioCD1.setAlbumName("Love Songs");
+        CDPlayer cdPlayer2 = new CDPlayer();
+        cdPlayer2.tapOnCdFlap();
+        cdPlayer2.setCD(audioCD1);
+        cdPlayer2.tapOnCdFlap();
+        cdPlayer2.setInfoText();
+
+        return Stream.of(
+                Arguments.of("[getInfoText() by infoText=null ] => shouldThrowReturnValueNullException","Case1", cdPlayer1,new ReturnValueNullException(),""),
+                Arguments.of("[getInfoText() by infoText=null ] => ExceptionShouldReturnAMessage","Case2",cdPlayer1,new ReturnValueNullException(),"Method should not return a Null-Value."),
+                Arguments.of("[getInfoText() by infoText=Message ] => MessageShouldContainInfoOfActualPlayTrack","Case3",cdPlayer2,null,""),
+                Arguments.of("[getInfoText() by infoText=Message ] => MessageShouldContainInfoAboutAlbum","Case4",cdPlayer2,null,""),
+                Arguments.of("[getInfoText() by infoText=Message ] => MessageShouldContainInfoAboutDevice","Case5",cdPlayer2,null,"")
+        );
+    }
+
 }