Sitecore.FakeDb.Db.GetItem C# (CSharp) Méthode

    public Item GetItem(ID id)
    {
      return this.Database.GetItem(id);
    }

    public void Update_ItemPassed_ShouldReplaceLinks([Substitute] LinkDatabase linkDb, Db db)
    {
      var datasourceItemId = ID.NewID;

      db.Add(new DbItem("source")
      {
        Children =
        {
          new DbItem("_Local")
          {
            new DbItem("DatasourceItem")
          }
        },
        Fields =
        {
          "testField"
        }
      });
      ;
      db.Add(new DbItem("target")
      {
        Children =
        {
          new DbItem("_Local")
          {
            new DbItem("DatasourceItem")
          }
        },
        Fields =
        {
          "testField"
        }
      });
      ;


      var sourceItem = db.GetItem("/sitecore/content/source");
      var targetItem = db.GetItem("/sitecore/content/target");
      var datasourceItem = db.GetItem("/sitecore/content/source/_Local/DatasourceItem");
      var targetDatasourceItem = db.GetItem("/sitecore/content/target/_Local/DatasourceItem");
      var itemLinks = new[]
      {
        new ItemLink(sourceItem, FieldIDs.LayoutField, datasourceItem, string.Empty)
      };

      linkDb.GetReferences(sourceItem).Returns(itemLinks.ToArray());
      using (new LinkDatabaseSwitcher(linkDb))
      {
        using (new EditContext(targetItem))
        {
          targetItem["__Renderings"] = datasourceItem.ID.ToString();
        }
        var referenceReplacer = new UpdateLocalDatasourceReferencesService(sourceItem, targetItem);

        referenceReplacer.Update();

        var expectedValue = targetDatasourceItem.ID.ToString();
        targetItem["__Renderings"].Should().Be(expectedValue);
      }
    }