DD.WellWorkover.Cloud/AsbCloudWebApi.Tests/RepositoryFactory.cs

using AsbCloudApp.Services;
using Moq;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudWebApi.Tests
{
    public class RepositoryFactory
    {
        public static Mock<TRepository> Make<TRepository, TDto>(ICollection<TDto> data)
            where TDto : AsbCloudApp.Data.IId
            where TRepository : class, ICrudService<TDto>
        {
            var repositoryMock = new Mock<TRepository>();

            repositoryMock.Setup(x => x.InsertAsync(It.IsAny<TDto>(), It.IsAny<CancellationToken>()))
                .Returns((TDto dto, CancellationToken token) => {
                    var id = data.Max(x => x.Id);
                    dto.Id = ++id;
                    data.Add(dto);
                    return Task.FromResult(dto.Id);
                });
            repositoryMock.Setup(x => x.DeleteAsync(It.IsAny<int>(), It.IsAny<CancellationToken>()))
                .Returns((int idFile, CancellationToken token) => {
                    var cnt = data.Count;
                    var dto = data.FirstOrDefault(x => x.Id == idFile);
                    data.Remove(dto);
                    return Task.FromResult(cnt - data.Count);
                });

            repositoryMock.Setup(x => x.GetAllAsync(It.IsAny<CancellationToken>())).ReturnsAsync(data);
            repositoryMock.Setup(x => x.GetOrDefaultAsync(It.IsAny<int>(), It.IsAny<CancellationToken>()))
                .Returns((int idFile, CancellationToken token) => {
                    return Task.FromResult(data.FirstOrDefault(x => x.Id == idFile));
                });

            return repositoryMock;
        }
    }
}