public void FontCollection_TestRemoveFontAndReUseIndex_ReturnCorrectCountAndAddSuccessfully()
{
var messenger = Substitute.For <IFrameworkMessenger>();
var surfaceManager = Substitute.For <IGpuSurfaceManager>();
IFontCollection collection = new FontCollection(messenger, surfaceManager);
collection.Add(0, Substitute.For <IFontModel>());
collection.Add(1, Substitute.For <IFontModel>());
collection.Add(2, Substitute.For <IFontModel>());
collection.Add(3, Substitute.For <IFontModel>());
collection.Add(4, Substitute.For <IFontModel>());
collection.Destroy(3, false);
Assert.Equal(4, collection.Count);
Assert.True(collection.Add(3, Substitute.For <IFontModel>()));
}