Adjusted some tests and removed clearDatabase() method because of the reason of data persistence.

test/hhn/temp/project/DatabaseGoodCasesTest.java

@@ -19,7 +19,7 @@ public class DatabaseGoodCasesTest {
   public void setup() throws SQLException {
     databaseManager = new SimpleDatabaseManager();
     databaseManager.connect();
-    databaseManager.clearDatabase();
+    //databaseManager.clearDatabase();
   }
 
   @Test
@@ -37,7 +37,7 @@ public class DatabaseGoodCasesTest {
     assertEquals(task.getName(), reTask.getName());
     assertEquals(task.getWorkerId(), reTask.getWorkerId());
 
-    assertEquals(1, databaseManager.getTotalNumberOfTasks());
+    databaseManager.deleteTask(task.getTaskId());
   }
 
   @Test
@@ -53,9 +53,11 @@ public class DatabaseGoodCasesTest {
 
     assertEquals(worker.getId(), reWorker.getId());
     assertEquals(worker.getName(), reWorker.getName());
+
+    databaseManager.deleteWorker(worker.getId());
   }
 
-  @Test
+  /*@Test
   @DisplayName("Clearing the database (Task and Worker) test")
   public void clearDatabaseTest() throws SQLException, InterruptedException {
     Task task1 = new Task(10, 5, "Hello", "World");
@@ -79,5 +81,5 @@ public class DatabaseGoodCasesTest {
 
     assertEquals(0, databaseManager.getTotalNumberOfTasks());
     assertEquals(0, databaseManager.getTotalNumberOfWorkers());
-  }
+  }*/
 }