BordComputer.play; instance of CDPlayer -> without fulfilling preconditions: ShouldReturnAnException.

src/main/java/BordComputer.java

@@ -4,6 +4,7 @@ import device.cdPlayer.CDPlayer;
 import device.radioPlayer.RadioPlayer;
 import device.usbPlayer.USB_Stick;
 import device.usbPlayer.UsbPlayer;
+import exception.NoItemEvenAllPreconditionAreMet;
 
 import java.io.FileReader;
 import java.lang.reflect.InvocationTargetException;
@@ -42,7 +43,13 @@ public class BordComputer {
     }
 
     public String play(){
-        String itemToPlay=activeDevice.play();
+        String itemToPlay=null;
+        try {
+            itemToPlay=activeDevice.play();
+        }catch (RuntimeException exception) {
+            throw new NoItemEvenAllPreconditionAreMet();
+        }
+
         return itemToPlay;
     }
 

src/main/java/exception/NoItemEvenAllPreconditionAreMet.java

@@ -0,0 +1,7 @@
+package exception;
+
+public class NoItemEvenAllPreconditionAreMet extends RuntimeException{
+    public NoItemEvenAllPreconditionAreMet(){
+        super("No Item returned even all preconditions are met.");
+    }
+}

src/test/java/BordComputerTest.java

@@ -1,7 +1,9 @@
 import device.Device;
 import device.cdPlayer.CDPlayer;
+import device.cdPlayer.exceptions.NegativeInputException;
 import device.radioPlayer.RadioPlayer;
 import device.usbPlayer.UsbPlayer;
+import exception.NoItemEvenAllPreconditionAreMet;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
@@ -100,15 +102,25 @@ class BordComputerTest {
             bordComputer.meetAllPreconditionForPlay();
             assertThat(bordComputer.play()).describedAs(testName).isNotEqualTo(null);
         }
+        if(testCase.equals("Case4")) {
+            Exception newException = assertThrows(NoItemEvenAllPreconditionAreMet.class, () -> bordComputer.play());
+            assertEquals(NoItemEvenAllPreconditionAreMet.class, newException.getClass());
+            assertEquals(newException.getMessage(), "No Item returned even all preconditions are met.");
+        }
     }
 
     static Stream<Arguments> playDate()throws ClassNotFoundException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
         BordComputer bordComputer = new BordComputer();
         bordComputer.readConfig();
+
+        BordComputer bordComputer2 = new BordComputer();
+        bordComputer2.readConfig();
+
         return Stream.of(
                 Arguments.of("[CDPlayer-> play(): after all preconditions are met] => ShouldReturnAnItemToPlay","Case1",bordComputer,"CDPlayer"),
                 Arguments.of("[RadioPlayer-> play(): after all preconditions are met] => ShouldReturnAnItemToPlay","Case2",bordComputer,"RadioPlayer"),
-                Arguments.of("[UsbPlayer-> play(): after all preconditions are met] => ShouldReturnAnItemToPlay","Case3",bordComputer,"UsbPlayer")
+                Arguments.of("[UsbPlayer-> play(): after all preconditions are met] => ShouldReturnAnItemToPlay","Case3",bordComputer,"UsbPlayer"),
+                Arguments.of("[CDPlayer-> play(): without fulfilling preconditions] => ShouldReturnAnException","Case4",bordComputer2,"CDPlayer")
         );
     }