From 64d051326de6e2033428c0157b33731b154e53ab Mon Sep 17 00:00:00 2001
From: JPANZO <jpanzo@bpe.local>
Date: Wed, 9 Feb 2022 19:28:00 +0100
Subject: [PATCH 1/2] Base-Test for method next created.

---
 src/main/java/device/cdPlayer/CDPlayer.java   |  8 ++++++
 .../java/device/cdPlayer/CDPlayerTest.java    | 25 +++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/main/java/device/cdPlayer/CDPlayer.java b/src/main/java/device/cdPlayer/CDPlayer.java
index b7134fa..209e646 100644
--- a/src/main/java/device/cdPlayer/CDPlayer.java
+++ b/src/main/java/device/cdPlayer/CDPlayer.java
@@ -114,4 +114,12 @@ public class CDPlayer implements Device {
             return false;
     }
 
+    public String getSongByNumber(int songNr){
+        return "";
+    }
+
+    public String getActualPlayTrack() {
+        return actualPlayTrack;
+    }
+
 }
diff --git a/src/test/java/device/cdPlayer/CDPlayerTest.java b/src/test/java/device/cdPlayer/CDPlayerTest.java
index 91ef68a..694460a 100644
--- a/src/test/java/device/cdPlayer/CDPlayerTest.java
+++ b/src/test/java/device/cdPlayer/CDPlayerTest.java
@@ -153,4 +153,29 @@ class CDPlayerTest {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("nextTestData")
+    void nextTest(String testName,String testDirection, CDPlayer _cdPlayer,int anzClicks, String expectedResult){
+        for (int i = 0; i < anzClicks; i++) {
+            _cdPlayer.next();
+        }
+        if(testDirection.equals("SecondSongSelected")){
+            assertThat(_cdPlayer.getActualPlayTrack()).describedAs(testName).isEqualTo(expectedResult);
+        }
+    }
+    static Stream<Arguments> nextTestData () {
+
+        String[] audioPlayList=new String[]{"Audio 01","Audio 02","Audio 03","Audio 04","Audio 05"};
+        CD audioCD=new CD("Audio",audioPlayList);
+
+        CDPlayer cdPlayer=new CDPlayer();
+        cdPlayer.tapOnCdFlap();
+        cdPlayer.setCD(audioCD);
+        cdPlayer.tapOnCdFlap();
+
+        return Stream.of(
+                Arguments.of("[getActualPlayTrack() after 1x next() starting by firstSong] => SecondSongSelected","SecondSongSelected", cdPlayer, 1, cdPlayer.getSongByNumber(1))
+        );
+    }
+
 }
\ No newline at end of file

From d1cb0386ba8ee77bb957c37f13dc82ccf10155fb Mon Sep 17 00:00:00 2001
From: JPANZO <jpanzo@bpe.local>
Date: Wed, 9 Feb 2022 20:00:48 +0100
Subject: [PATCH 2/2] Productive code for case:1 of method-test next created.

---
 src/main/java/device/cdPlayer/CDPlayer.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/java/device/cdPlayer/CDPlayer.java b/src/main/java/device/cdPlayer/CDPlayer.java
index 209e646..ff1caf2 100644
--- a/src/main/java/device/cdPlayer/CDPlayer.java
+++ b/src/main/java/device/cdPlayer/CDPlayer.java
@@ -42,7 +42,10 @@ public class CDPlayer implements Device {
 
     @Override
     public void next() {
+        List<String> playList =  Arrays.asList(loadedCD.getPlayList());
+        int indexOfActualPlayTrack=playList.indexOf(actualPlayTrack);
 
+        this.actualPlayTrack=playList.get(indexOfActualPlayTrack +1);
     }
 
     @Override
@@ -115,7 +118,8 @@ public class CDPlayer implements Device {
     }
 
     public String getSongByNumber(int songNr){
-        return "";
+        List<String> playList =  Arrays.asList(loadedCD.getPlayList());
+        return playList.get(songNr);
     }
 
     public String getActualPlayTrack() {