public async Task DeleteByProduct_ShouldOk()
{
var mock = new Mock <IReviewService>(MockBehavior.Strict);
mock.Setup(repo => repo.DeleteReviewByProductAsync(1, "")).Returns(Task.Run(() => { })).Verifiable();
var controller = new ReviewController(mock.Object);
var result = await controller.DeleteByProduct(1);
var controllerResult = result as OkResult;
Assert.IsNotNull(controllerResult);
mock.Verify();
mock.Verify(repo => repo.DeleteReviewByProductAsync(1, ""), Times.Once);
}