Set PWLength Functionality, proved against wrong input

src/main/java/Vault.java

@@ -45,7 +45,13 @@ public class Vault implements VaultInterface {
         Scanner scan = new Scanner(inputS);
         String input = scan.nextLine();
 
-        PWLength = Integer.parseInt(input);
+        try {
+            PWLength = Integer.parseInt(input);
+        } catch (NumberFormatException e) {
+            println("Please Enter Valid Number.");
+        }
+
+
 
         println("\nNew PWlength is now: ");
     }

src/test/java/VaultTest.java

@@ -89,6 +89,19 @@ public class VaultTest {
         assertTrue(outputStream.toString().contains("now:"));
     }
 
+    @Test
+    void setPWLengthWrongInput() {
+        vlt.inputS = new ByteArrayInputStream("T\n".getBytes(StandardCharsets.UTF_8));
+        vlt.setPWLength();
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        vlt.inputS = getEmptyStringInputStream();
+        vlt.outputS = outputStream;
+
+        assertThrowsExactly(NoSuchElementException.class, () -> vlt.setPWLength());
+        assertTrue(outputStream.toString().startsWith("Set"));
+    }
+
     private ByteArrayInputStream getEmptyStringInputStream() {
         return new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8));
     }