Reverts some mistakes

Implements and tests function to delete entries

@TODO: catch index left-shift after deleting an item

src/main/java/Credential.java

@@ -1,9 +1,5 @@
 public class Credential {
 
-    /**
-     * Value Object für das Tupel aus name + pw
-     */
-
     private String name, password;
     private int id;
 
@@ -27,4 +23,9 @@ public class Credential {
     {
         this.password = newPassword;
     }
+
+    public void updateUsername(String newUsername)
+    {
+        this.name = newUsername;
+    }
 }

src/main/java/CredentialRepository.java

@@ -49,7 +49,6 @@ public class CredentialRepository implements CredentialRepositoryInterface{
            return null;
         }
 
-
     }
 
     /*
@@ -60,20 +59,53 @@ public class CredentialRepository implements CredentialRepositoryInterface{
 
 
     @Override
-    public void updatePassword(int index) {
+    public void updatePassword(int index, String newPassword) {
 
+        try{
+            this.credentials.get(index).upDatePassword(newPassword);
+        }
+        catch (IndexOutOfBoundsException outOfBoundsException)
+        {
+            System.err.println("No Credential with Index" + index + " found");
         }
 
-    public void updateUsername(int index){
+    }
 
+    public void updateUsername(int index, String newUsername){
+
+        try{
+            this.credentials.get(index).updateUsername(newUsername);
+        }
+        catch (IndexOutOfBoundsException outOfBoundsException)
+        {
+            System.err.println("No Credential with Index" + index + " found");
+        }
     }
 
     @Override
     public void delete(int index) {
 
+        this.credentials.remove(index);
+
     }
 
+/*
+    this function will be required in the future for catching the left-shift in the arrayList
+    after one entry was deleted. welp, maybe it won't. can't tell and i've no time atm to
+    finish this
 
+
+    private int mapIndexToListCounter(int needle) {
+        for(int c = 0; c<this.credentials.size(); c++)
+        {
+            if(this.credentials.get(c).getId() == needle)
+            {
+                return c;
+            }
+        }
+        return -1;
+    }
+*/
     private int getListSize()
     {
         return this.credentials.size();

src/main/java/CredentialRepositoryInterface.java

@@ -3,8 +3,8 @@ public interface CredentialRepositoryInterface {
     int createNewCredential(String name, String password);
     Credential getCredentialsViaName(String needle);
     Credential getCredentialsViaId(int id);
-    void updatePassword(int index);
-    void updateUsername(int index);
+    void updatePassword(int index, String newPassword);
+    void updateUsername(int indexl, String newUsername);
     void delete(int index);
 
 }

src/test/java/CredentialRepositoryTest.java

@@ -49,13 +49,36 @@ class CredentialRepositoryTest {
 
     }
 
+    @Test
+    void testUpdatePassword(){
+
+        this.credentialRepository.createNewCredential("mock", "mock");
+        this.credentialRepository.updatePassword(0, "newPassword");
+
+        Credential c = this.credentialRepository.getCredentialsViaId(0);
+
+        Assertions.assertEquals("newPassword", c.getPassword());
+
+    }
+
+    @Test
+    void testUpdateUsername(){
+
+        this.credentialRepository.createNewCredential("mock", "mock");
+        this.credentialRepository.updateUsername(0, "newUsername");
+
+        Credential c = this.credentialRepository.getCredentialsViaId(0);
+
+        Assertions.assertEquals("newUsername", c.getName());
     }
 
+    @Test
+    void testDeleteEntry(){
 
-      /*
-        Exception failed = Assertions.assertThrows(Exception.class, () -> {
-            this.credentialRepository.createNewCredential(null,null);
-        });
+        this.credentialRepository.createNewCredential("mock", "mock");
+        this.credentialRepository.delete(0);
+
+        Assertions.assertEquals(null, this.credentialRepository.getCredentialsViaId(0));
+    }
 
-        Assertions.assertEquals("kein leeres Objekt erstellen", failed.getMessage());
-        */
+}