Implements testable function signature and first unit test

src/main/java/Credential.java

@@ -10,7 +10,7 @@ public class Credential {
 
     public Credential(String name, String password, int id) throws Exception {
         if(name == null || password == null)
-            throw new Exception("kein leeres Objekt erstellen bliat");
+            throw new Exception("kein leeres Objekt erstellen");
 
         this.name = name;
         this.password = password;

src/main/java/CredentialRepository.java

@@ -10,7 +10,7 @@ public class CredentialRepository implements CredentialRepositoryInterface{
         this.credentials = new ArrayList<Credential>();
     }
 
-    public void createNewCredential(String name, String password)
+    public int createNewCredential(String name, String password)
     {
         try {
             this.credentials.add(new Credential(name, password, this.idCounter++));
@@ -19,6 +19,8 @@ public class CredentialRepository implements CredentialRepositoryInterface{
         {
             System.err.println(fail.getMessage());
         }
+
+        return this.getListSize();
     }
 
     @Override
@@ -50,6 +52,12 @@ public class CredentialRepository implements CredentialRepositoryInterface{
     public void loadCredentialsFromJSON() {
 
     }
+
+    private int getListSize()
+    {
+        return this.credentials.size();
+    }
+
 }
 
 

src/main/java/CredentialRepositoryInterface.java

@@ -1,6 +1,6 @@
 public interface CredentialRepositoryInterface {
 
-    void createNewCredential(String name, String password);
+    int createNewCredential(String name, String password);
     void edit();
     void delete();
     void getCredentials();

src/test/java/CredentialRepositoryTest.java

@@ -1,5 +1,6 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Assertions;
 
 class CredentialRepositoryTest {
 
@@ -15,8 +16,17 @@ class CredentialRepositoryTest {
     @Test
     void createNewCredentialAndAddToList() {
 
-
-
+        Assertions.assertEquals(1, this.credentialRepository.createNewCredential("mock", "mock"));
+        Assertions.assertEquals(2, this.credentialRepository.createNewCredential("kek", "mate"));
     }
 
 }
+
+
+      /*
+        Exception failed = Assertions.assertThrows(Exception.class, () -> {
+            this.credentialRepository.createNewCredential(null,null);
+        });
+
+        Assertions.assertEquals("kein leeres Objekt erstellen", failed.getMessage());
+        */