upload

test/project/BadCaseTaskTest.java

@@ -69,4 +69,18 @@ public class BadCaseTaskTest {
 
     }
 
+  @Test
+  @DisplayName("Assert an IllegalArgumentException when delete a existing Task with wrong arguments")
+  public void assertExceptionOnDeletingTask (){
+    String wrongName = "Manager";
+    String name = "Name";
+    String description = "Description";
+    Task task = taskManager.createTask(name, description);
+
+    assertThrows(IllegalArgumentException.class, () -> taskManager.deleteTask(null));
+    assertThrows(IllegalArgumentException.class, () -> taskManager.deleteTask(""));
+    assertThrows(IllegalArgumentException.class, () -> taskManager.deleteTask(wrongName));
+
+  }
+
 }