public async Task UploadValidIdentityNumberFiles_Test_ReturnsOk()
        {
            // Arrange
            var identityNumberService = new IdentityNumberService(_fixture.MockValidIdentityNumberRepository.Object,
                                                                  _fixture.MockInvalidIdentityNumberRepository.Object);
            var controller = new IdentityNumberController(_fixture.Configuration, identityNumberService);

            var          fileMock = new Mock <IFormFile>();
            var          content  = "8501015800088" + Environment.NewLine + "85010" + Environment.NewLine;
            const string fileName = "IdentityNumbers.txt";
            var          ms       = new MemoryStream();
            var          writer   = new StreamWriter(ms);

            writer.Write(content);
            writer.Flush();
            ms.Position = 0;
            ms.SetLength(content.Length);
            fileMock.Setup(_ => _.OpenReadStream()).Returns(ms);
            fileMock.Setup(_ => _.FileName).Returns(fileName);
            fileMock.Setup(_ => _.Length).Returns(ms.Length);

            // Act
            var result = await controller.ValidateUploadFilesAsync(new List <IFormFile> {
                fileMock.Object
            });

            // Assert
            Assert.NotNull(result);
            var actionResult = Assert.IsType <ActionResult <IdentityNumberListModel> >(result);
            var objectResult = Assert.IsType <OkObjectResult>(actionResult.Result);
            var model        = Assert.IsType <IdentityNumberListModel>(objectResult.Value);

            Assert.Single(model.ValidIdentityNumbers);
            Assert.Single(model.InvalidIdentityNumbers);
        }
        public async Task PostUploadInvalidIdentityNumberFiles_Test_ReturnsBadRequest()
        {
            // Arrange
            var identityNumberService = new IdentityNumberService(_fixture.MockValidIdentityNumberRepository.Object,
                                                                  _fixture.MockInvalidIdentityNumberRepository.Object);
            var controller = new IdentityNumberController(_fixture.Configuration, identityNumberService);

            // Act
            var result = await controller.ValidateUploadFilesAsync(null);

            // Assert
            Assert.NotNull(result);
            Assert.IsType <BadRequestObjectResult>(result.Result);
        }