public class InventoryPickUpTest : MonoBehaviour
{
    public Item Item1;
    public Item Item2;

    private Inventory _inv;
    private bool _passed = true;

    public void Start()
    {
        _inv = GetComponent<Inventory>();
        if (_inv.GetDifferentItemsCount() != 0)
        {
            fail("Inventory not empty at start.");
        }
        if (_inv.GetItemCount(Item1) != 0)
        {
            fail("Item that was not added to inventory was found in inventory.");
        }
        _inv.AddItem(Item1);
        if (Item1.transform.parent != this.transform)
        {
            fail("First added item was not made a child of the inventory.");
        }
        if (Item1.gameObject.activeSelf)
        {
            fail("First added item was still active after being added.");
        }
        if (_inv.GetItemCount(Item1) != 1)
        {
            fail("GetItemCount for added item was not 1.");
        }
        _inv.AddItem(Item2);
        if (_inv.GetDifferentItemsCount() != 1)
        {
            fail("Diff item count in inventory != 1.");
        }
    }

    public void Update()
    {
        if (Item2 != null)
        {
            fail("Second identical item added was not destroyed at the time of addition.");
        }
        endTest();
    }

    private void fail(string reason)
    {
        print("FAIL:" + reason);
        _passed = false;
    }

    private void endTest()
    {
        if (_passed)
        {
            IntegrationTest.Pass(this.gameObject);
        }
        else
        {
            IntegrationTest.Fail(this.gameObject);
        }
    }
}