implement menu navigation to create a new vault

src/main/java/PasswordManager.java

@@ -58,7 +58,8 @@ public class PasswordManager implements PasswordManagerInterface {
         sb.append("\nciip Gruppe 8 - Password Manager\n\n");
 
         sb.append("Menu:\n");
-        sb.append("- list vaults: l:\n");
+        sb.append("- list vaults: l\n");
+        sb.append("- create new vault: v\n");
         sb.append("- select vault: v x (replace x with vault id)\n");
         sb.append("- exit: e\n");
 
@@ -70,6 +71,8 @@ public class PasswordManager implements PasswordManagerInterface {
             running = false;
         } else if (input.equals("l")) {
             listVaults();
+        } else if (input.equals("v")) {
+            createNewVault();
         } else if (input.startsWith("v")) {
             String vaultAction = (input.replace('v', ' ')).trim();
             int vaultId = -1;

src/test/java/PasswordManagerTest.java

@@ -49,6 +49,16 @@ class PasswordManagerTest {
         assertTrue(outputStream.toString().endsWith("Vaults:\n"));
     }
 
+    @Test
+    void menuNavigationCreateNewVault() {
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        pm.inputStream = new ByteArrayInputStream("v\n".getBytes(StandardCharsets.UTF_8));
+        pm.outputStream = outputStream;
+        int vaultCount = pm.vaults.size();
+        pm.showMenu();
+        assertEquals(vaultCount + 1, pm.vaults.size());
+    }
+
     @Test
     void menuNavigationOpenVault() {
         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();