public async Task AddOrUpdate_ValidIdAndDocument_CallsApplicationService()
{
// Arrange
var service = new Mock <IDocumentService>();
var target = new DocumentsController(service.Object);
var fixture = new Fixture();
var model = fixture.Create <AddOrUpdateDocumentModel>();
var documentId = Guid.NewGuid();
// Act
await target.AddOrUpdate(documentId, model);
// Assert
service.Verify(i => i.Save(documentId, It.IsAny <DocumentDto>()));
}