public AssetFolderGrainTests()
{
A.CallTo(() => assetQuery.FindAssetFolderAsync(parentId))
.Returns(new List <IAssetFolderEntity> {
A.Fake <IAssetFolderEntity>()
});
sut = new AssetFolderGrain(Store, assetQuery, limit, A.Dummy <ISemanticLog>());
sut.ActivateAsync(Id).Wait();
}