[Fact] public void GetPostById_ShouldContactBlogPostGrain()
{
var postGrain = new Mock <IBlogPostGrain>();
var post = new BlogPost {
BlogPostId = Guid.NewGuid()
};
_clusterClient.Setup(c => c.GetGrain <IBlogPostGrain>(post.BlogPostId, null))
.Returns(() => postGrain.Object);
postGrain.Setup(g => g.Find()).Returns(() => Task.FromResult(post));
_blogPostService.GetPostById(post.BlogPostId)
.Should().Be(post, "because that's what we requested");
_clusterClient.Verify(c => c.GetGrain <IBlogPostGrain>(post.BlogPostId, null), Times.Once(),
"because we need to fetch the grain");
postGrain.Verify(g => g.Find(), Times.Once(),
"because we need to fetch the post");
_clusterClient.VerifyNoOtherCalls();
postGrain.VerifyNoOtherCalls();
}