src/main/java/hhn/temp/project/provider/Database.java

@@ -1,5 +1,7 @@
 package hhn.temp.project.provider;
 
+import java.sql.SQLException;
+
 public interface Database {
-  public boolean connect();
+  public void connect() throws SQLException;
 }

src/main/java/hhn/temp/project/provider/SimpleDatabaseManager.java

@@ -0,0 +1,32 @@
+package hhn.temp.project.provider;
+
+import java.sql.SQLException;
+import java.util.Collection;
+import java.util.List;
+
+public class SimpleDatabaseManager<E> implements DatabaseManager<E> {
+  @Override
+  public void saveObjects(Collection<E> objects) {
+
+  }
+
+  @Override
+  public Collection<E> getObjects() {
+    return List.of();
+  }
+
+  @Override
+  public void saveObject(E object) {
+
+  }
+
+  @Override
+  public E getObject(int id) {
+    return null;
+  }
+
+  @Override
+  public void connect() {
+    //...
+  }
+}

test/hhn/temp/project/BadCasesTest.java

@@ -8,7 +8,7 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class BadCasesTest {
-    AssignmentManager manager;
+    /*AssignmentManager manager;
 
     @BeforeEach
     public void setup() {
@@ -33,6 +33,6 @@ public class BadCasesTest {
     public void assertEditOnlyExistingTasks() {
         int workerId = manager.createWorker("Alfred");
         assertThrows(manager.editTask(workerId, 99969, "I", "am Illegal") instanceof IllegalArgumentException);
-    }
+    }*/
 
 }

test/hhn/temp/project/DatabaseBadCasesTest.java

@@ -0,0 +1,39 @@
+package hhn.temp.project;
+
+import hhn.temp.project.provider.DatabaseManager;
+import hhn.temp.project.provider.SimpleDatabaseManager;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.sql.SQLException;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class DatabaseBadCasesTest {
+
+  private DatabaseManager<DatabaseGoodCasesTest.TestClass> databaseManager;
+
+  public class TestClass {
+    private int id;
+    private String dataString;
+    private int dataInteger;
+
+    public TestClass(int id, String dataString, int dataInteger) {
+      this.id = id;
+      this.dataString = dataString;
+      this.dataInteger = dataInteger;
+    }
+  }
+
+  @BeforeEach
+  public void setup() {
+    databaseManager = new SimpleDatabaseManager<>();
+  }
+
+  @Test
+  @DisplayName("Assert connection failed")
+  public void assertConnectionFailed() {
+    assertThrows(SQLException.class, () -> databaseManager.connect());
+  }
+}

test/hhn/temp/project/DatabaseGoodCasesTest.java

@@ -0,0 +1,33 @@
+package hhn.temp.project;
+
+import hhn.temp.project.provider.DatabaseManager;
+import hhn.temp.project.provider.SimpleDatabaseManager;
+import org.junit.jupiter.api.BeforeEach;
+
+import java.sql.SQLException;
+
+public class DatabaseGoodCasesTest {
+
+  private DatabaseManager<DatabaseGoodCasesTest.TestClass> databaseManager;
+
+  public class TestClass {
+    private int id;
+    private String dataString;
+    private int dataInteger;
+
+    public TestClass(int id, String dataString, int dataInteger) {
+      this.id = id;
+      this.dataString = dataString;
+      this.dataInteger = dataInteger;
+    }
+  }
+
+  @BeforeEach
+  public void setup() {
+    databaseManager = new SimpleDatabaseManager<>();
+  }
+
+  public void assertConnectToDatabase() throws SQLException {
+    databaseManager.connect();
+  }
+}

test/hhn/temp/project/GoodCasesTest.java

@@ -7,7 +7,7 @@ import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.*;
 
 public class GoodCasesTest {
-    AssignmentManager manager;
+    /*AssignmentManager manager;
 
     @BeforeEach
     public void setup() {
@@ -57,6 +57,6 @@ public class GoodCasesTest {
         int taskId = manager.addTask(workerId, "Run", "Jog 10 Miles");
         manager.removeTask(taskId);
         assertThrows(manager.getTask(taskId) instanceof  IllegalArgumentException);
-    }
+    }*/
 
 }