Wrote the first BadCasesTests

test/hhn/temp/project/BadCasesTest.java

@@ -4,27 +4,35 @@ import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
 public class BadCasesTest {
+    AssignmentManager manager;
 
     @BeforeEach
     public void setup() {
-        AssignmentManager manager = new AssignmentManager();
+        manager = new AssignmentManager();
     }
 
     @Test
     @DisplayName("Assert that added tasks can't be Null")
     public void assertNewTasksAreNotNull() {
-
+        int workerId = manager.createWorker("Alfred");
+        assertThrows(manager.addTask(workerId, null, null) instanceof IllegalArgumentException);
     }
     @Test
     @DisplayName("Assert List isn't empty after adding a task")
     public void assertListNowEmptyAfterAdd() {
-
+        int workerId = manager.createWorker("Alfred");
+        int taskId = manager.addTask(workerId, "Run", "Jog 10 Miles");
+        assertTrue(manager.getTaskList().size >= 1);
     }
     @Test
     @DisplayName("Assert only existing tasks can be edited")
     public void assertEditOnlyExistingTasks() {
-
+        int workerId = manager.createWorker("Alfred");
+        assertThrows(manager.editTask(workerId, 99969, "I", "am Illegal") instanceof IllegalArgumentException);
     }
 
 }