Method getVolume of CDPlayer tested on getVolumeReturnValueBetween0And100.

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

@@ -2,6 +2,7 @@ package device.cdPlayer;
 
 import device.Device;
 import device.cdPlayer.exceptions.*;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
@@ -249,10 +250,7 @@ class CDPlayerTest {
             for (int i = 0; i < interfaceMethods.length; i++) {
                 assertThat(deviceMethods.contains(interfaceMethods[i].getName())).describedAs(testName).isEqualTo(true);
             }
-
         }
-
-
     }
     static Stream<Arguments> getOptionsTestData () {
         CDPlayer cdPlayer1 = new CDPlayer();
@@ -263,6 +261,15 @@ class CDPlayerTest {
         );
     }
 
-
+    @Test
+    void getVolumeReturnValueBetween0And100(){
+        CDPlayer cdPlayer1 = new CDPlayer();
+        boolean volumeIstInValueRange=false;
+        int volume=cdPlayer1.getVolume();
+        if(volume>=0 && volume <=100){
+            volumeIstInValueRange=true;
+        }
+        assertThat(volumeIstInValueRange).isEqualTo(true);
+    }
 
 }