Wrote all the Tests for the Scanner UI

src/main/java/hhn/temp/project/AssignmentManager.java

@@ -26,11 +26,14 @@ public class AssignmentManager {
         workerMap.put(workerIdCounter, worker);
         return workerIdCounter;
     }
+    public void removeWorker(int workerId) {
+        workerMap.remove(workerId);
+    }
     public int addTask(int workerId, String name, String description) {
         if (!workerMap.containsKey(workerId) || name == null || description == null) {
             throw new IllegalArgumentException("WorkerId must exist and name or description can't be null");
         }
-        Task task = new Task(++taskIdCounter, workerId, name, description, this);
+        Task task = new Task(++taskIdCounter, workerId, name, description);
         taskMap.put(taskIdCounter, task);
         return taskIdCounter;
     }