From fc6f610b6a2aa6a8844a03773bbe467f4324b797 Mon Sep 17 00:00:00 2001
From: JPANZO <jpanzo@bpe.local>
Date: Tue, 15 Feb 2022 17:35:57 +0100
Subject: [PATCH] test+productive code for case:1 of method prev in CDPlayer
 created.

---
 src/main/java/device/cdPlayer/CDPlayer.java   |  3 ++-
 .../java/device/cdPlayer/CDPlayerTest.java    | 23 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/main/java/device/cdPlayer/CDPlayer.java b/src/main/java/device/cdPlayer/CDPlayer.java
index 5a55a91..9a55f4c 100644
--- a/src/main/java/device/cdPlayer/CDPlayer.java
+++ b/src/main/java/device/cdPlayer/CDPlayer.java
@@ -52,7 +52,8 @@ public class CDPlayer implements Device {
 
     @Override
     public void prev() {
-
+        List<String> playList =  Arrays.asList(loadedCD.getPlayList());
+        this.actualPlayTrack=playList.get(playList.indexOf(actualPlayTrack)-1);
     }
 
     @Override
diff --git a/src/test/java/device/cdPlayer/CDPlayerTest.java b/src/test/java/device/cdPlayer/CDPlayerTest.java
index 17bb3c0..fdd833a 100644
--- a/src/test/java/device/cdPlayer/CDPlayerTest.java
+++ b/src/test/java/device/cdPlayer/CDPlayerTest.java
@@ -197,4 +197,27 @@ class CDPlayerTest {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("prevTestData")
+    void prevTest(String testName,String testDirection, CDPlayer _cdPlayer,int anzClicks, String expectedResult){
+        for (int i = 0; i <anzClicks; i++) {
+            _cdPlayer.prev();
+        }
+        assertThat(_cdPlayer.getActualPlayTrack()).describedAs(testName).isEqualTo(expectedResult);
+    }
+    static Stream<Arguments> prevTestData () {
+
+        String[] audioPlayList = new String[]{"Audio 01", "Audio 02", "Audio 03", "Audio 04", "Audio 05"};
+        CD audioCD = new CD("Audio", audioPlayList);
+
+        CDPlayer cdPlayer1 = new CDPlayer();
+        cdPlayer1.tapOnCdFlap();
+        cdPlayer1.setCD(audioCD);
+        cdPlayer1.tapOnCdFlap();
+        cdPlayer1.next();
+
+        return Stream.of(
+                Arguments.of("[getActualPlayTrack() after 1x prev() starting by secondSong] => FirstSongSelected", "FirstSongSelected", cdPlayer1, 1, cdPlayer1.getSongByNumber(0))
+        );
+    }
 }
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