public async Task DeletComments_ShouldDeleteDestinationCommentsCorrectly()
{
List <Comment> deletedComments = new List <Comment>();
var commentsRepoBuilder = new CommentsRepositoryBuilder();
commentsRepoBuilder.CommentsRepoMock.Setup(r => r.Delete(It.IsAny <Comment>()))
.Callback <Comment>(c => deletedComments.Add(c));
var commentsRepo = commentsRepoBuilder
.WithAll()
.Build();
var sut = new DestinationService(null, null, null, commentsRepo, null, null, null, Mapper);
await sut.DeleteComments("2");
Assert.Equal(3, deletedComments.Count);
deletedComments.ForEach(c => Assert.Equal("2", c.DestinationId));
commentsRepoBuilder.CommentsRepoMock.Verify(c => c.Delete(It.IsAny <Comment>()), Times.Exactly(3));
commentsRepoBuilder.CommentsRepoMock.Verify(c => c.SaveChangesAsync(), Times.Once);
}