public IEnumerator StorylistItem_Select_Story_Test() { //Create a blank canvas Canvas canvas = CreateTestGameObject <Canvas>(); //Fetch a dummy story Story story = GetStories()[0];//GetResources<Story>("Content/Stories/DummyStory"); //Fetch prefab from resources StorylistItem storylistItem = GetResources <StorylistItem>("Prefabs/UI elements/StorylistItem"); //Instantiate the prefab to the canvas Object.Instantiate(storylistItem, canvas.transform); //Get references to the storylistitem content components Text title = storylistItem.transform.Find("txtStorylistItemTitle").GetComponent <Text>(); Text description = storylistItem.transform.Find("txtStorylistItemDesc").GetComponent <Text>(); Button button = storylistItem.GetComponent <Button>(); //Create a substitute for the item select callback IOnStoryItemSelected callback = Substitute.For <IOnStoryItemSelected>(); //Construct the list item storylistItem.Constructor(title, description); storylistItem.SetItemContent(story, callback); //Simulate a click on the item button.onClick.Invoke(); //Move to the next frame yield return(null); //Check if the selection was registered callback.Received().OnStoryItemSelected(story); }