public async Task GetLeastFavouriteColor_WithGrainState_ReturnsColor()
{
// Arrange
var state = new ColorGrainState
{
Color = Color.Red,
Id = GrainId,
};
Silo.AddGrainState <ColorRankingGrain, ColorGrainState>(state: state);
var grain = await Silo.CreateGrainAsync <ColorRankingGrain>(GrainId);
// Act
var color = await grain.GetLeastFavouriteColor();
color.Should().Be(Color.Red);
}