Unit test the Automapper profiles

Question

I do want to test the custom logic in the CreateMap method. I do NOT want to test whether the mapping exist at all for some types.

How can I do that or what are the classes that I need to know. I am grateful for every hint The document about. Automapper unit testing seems very rare...

public class UnitProfile : Profile {    protected override void Configure()    {       // Here I create my maps with custom logic that needs to be tested      CreateMap<Unit, UnitTreeViewModel>()          .ForMember(dest => dest.IsFolder, o => o.MapFrom(src => src.UnitTypeState == UnitType.Folder ? true : false));      CreateMap<CreateUnitViewModel, Unit>()          .ForMember(dest => dest.UnitTypeState, o => o.MapFrom(src => (UnitType)Enum.ToObject(typeof(UnitType), src.SelectedFolderTypeId)));    } } 

Answer 1

This is the documentation for configuration testing: http://docs.automapper.org/en/stable/Configuration-validation.html

You can see an example of it here: https://stackoverflow.com/a/14150006/1505426

Answer 2

An example of tests for Automapper profile (I used Automapper in version 10.0.0 amd NUnit in version 3.12.0):

RowStatusEnum

namespace StackOverflow.RowStatus {     public enum RowStatusEnum     {         Modified = 1,         Removed = 2,         Added = 3     } } 

MyProfile

namespace StackOverflow.RowStatus {     using System;     using System.Linq;      using AutoMapper;      public class MyProfile : Profile     {         public MyProfile()         {             CreateMap<byte, RowStatusEnum>().ConvertUsing(                 x => Enum.GetValues(typeof(RowStatusEnum))                     .Cast<RowStatusEnum>().First(y => (byte)y == x));             CreateMap<RowStatusEnum, byte>().ConvertUsing(                 x => (byte)x);         }     } } 

MappingTests

namespace StackOverflow.RowStatus {     using AutoMapper;      using NUnit.Framework;      [TestFixture]     public class MappingTests     {         [Test]         public void AutoMapper_Configuration_IsValid()         {             var config = new MapperConfiguration(cfg => cfg.AddProfile<MyProfile>());             config.AssertConfigurationIsValid();         }          [TestCase(1, ExpectedResult = RowStatusEnum.Modified)]         [TestCase(2, ExpectedResult = RowStatusEnum.Removed)]         [TestCase(3, ExpectedResult = RowStatusEnum.Added)]         public RowStatusEnum AutoMapper_ConvertFromByte_IsValid(             byte rowStatusEnum)         {             var config = new MapperConfiguration(cfg => cfg.AddProfile<MyProfile>());             var mapper = config.CreateMapper();             return mapper.Map<byte, RowStatusEnum>(rowStatusEnum);         }          [TestCase(RowStatusEnum.Modified, ExpectedResult = 1)]         [TestCase(RowStatusEnum.Removed, ExpectedResult = 2)]         [TestCase(RowStatusEnum.Added, ExpectedResult = 3)]         public byte AutoMapper_ConvertFromEnum_IsValid(             RowStatusEnum rowStatusEnum)         {             var config = new MapperConfiguration(cfg => cfg.AddProfile<MyProfile>());             var mapper = config.CreateMapper();             return mapper.Map<RowStatusEnum, byte>(rowStatusEnum);         }     } }