UpdateFile() private method

private UpdateFile ( Microsoft.Research.DataOnboarding.DomainModel.File modifiedFile ) : Microsoft.Research.DataOnboarding.DomainModel.File
modifiedFile Microsoft.Research.DataOnboarding.DomainModel.File
return Microsoft.Research.DataOnboarding.DomainModel.File
        public void Update_File_With_FileData_Null_Test()
        {
            IFileRepository repository = new FileRepository(testDBContext);

            var file = repository.GetItem(1, 1);

            file.BlobId = "TestBlobid";
            file.Citation = "Updated Citation";
            file.Description = "Updated description";
            file.FileMetadataFields = null;
            file.FileColumns = null;
            file.FileQualityChecks = null;

            repository.UpdateFile(file);
            testDBContext.Commit();
            var updatedFile = repository.GetItem(1, 1);

            Assert.AreEqual(updatedFile.BlobId, "TestBlobid");
            Assert.AreEqual(updatedFile.Citation, "Updated Citation");
            Assert.AreEqual(updatedFile.Description, "Updated description");

            Assert.IsNull(file.FileMetadataFields);
            Assert.IsNull(file.FileColumns);
            Assert.IsNull(file.FileQualityChecks);
        }