implement exiting menu

src/main/java/PasswordManager.java

@@ -1,14 +1,18 @@
-import java.io.BufferedInputStream;
 import java.io.InputStream;
+import java.util.Scanner;
 
 public class PasswordManager implements PasswordManagerInterface {
+
+    boolean running = true;
+
     public static void main(String[] args) {
         PasswordManager pm = new PasswordManager();
 
-        while (true) {
+        while (pm.running) {
             InputStream inputStream = System.in;
             pm.showMenu(inputStream);
         }
+        System.exit(0);
     }
 
     public PasswordManager() {
@@ -27,6 +31,20 @@ public class PasswordManager implements PasswordManagerInterface {
 
     @Override
     public void showMenu(InputStream inputStream) {
+        StringBuilder sb = new StringBuilder();
+        Scanner scan = new Scanner(inputStream);
+
+        sb.append("ciip Gruppe 8 - Password Manager\n\n");
+
+        sb.append("Menu:\n");
+        sb.append("- exit: e\n");
 
+        System.out.println(sb + "\n");
+
+        String input = scan.nextLine();
+
+        if (input.equals("e")) {
+            running = false;
+        }
     }
 }

src/test/java/PasswordManagerTest.java

@@ -4,6 +4,7 @@ import org.junit.jupiter.api.Test;
 import java.io.BufferedInputStream;
 import java.io.ByteArrayInputStream;
 import java.nio.charset.StandardCharsets;
+import java.util.NoSuchElementException;
 
 import static org.junit.jupiter.api.Assertions.*;
 
@@ -34,6 +35,13 @@ class PasswordManagerTest {
 
     @Test
     void showMenu() {
-        pm.showMenu(new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8)));
+        ByteArrayInputStream virtualConsoleInput = new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8));
+        assertThrowsExactly(NoSuchElementException.class, () -> pm.showMenu(virtualConsoleInput));
+    }
+
+    @Test
+    void exitMenu() {
+        pm.showMenu(new ByteArrayInputStream("e\n".getBytes(StandardCharsets.UTF_8)));
+        assertFalse(pm.running);
     }
 }