Media

[Fact]
public void HowToMockMediaItemProvider()
{
  const string MyImageUrl = "~/media/myimage.ashx";
  Sitecore.Data.ID mediaItemId = Sitecore.Data.ID.NewID;

  // create some media item. Location, fields and template are not important
  using (Sitecore.FakeDb.Db db = new Sitecore.FakeDb.Db
  {
    new Sitecore.FakeDb.DbItem("my-image", mediaItemId)
  })
  {
    Sitecore.Data.Items.Item mediaItem = db.GetItem(mediaItemId);

    // create media provider mock and configure behaviour
    Sitecore.Resources.Media.MediaProvider mediaProvider =
      NSubstitute.Substitute.For<Sitecore.Resources.Media.MediaProvider>();

    mediaProvider
      .GetMediaUrl(Arg.Is<Sitecore.Data.Items.MediaItem>(i => i.ID == mediaItemId))
      .Returns(MyImageUrl);

    // substitute the original provider with the mocked one
    using (new Sitecore.FakeDb.Resources.Media.MediaProviderSwitcher(mediaProvider))
    {
      string mediaUrl = Sitecore.Resources.Media.MediaManager.GetMediaUrl(mediaItem);
      Xunit.Assert.Equal(MyImageUrl, mediaUrl);
    }
  }
}