SparkyTools.AutoMapper 1.3.0

see also:

• SparkyTestHelpers.Mapping: Helpers for testing properties "mapped" from one type to another
• SparkyTestHelpers.AutoMapper: Extends SparkyTestHelpers.Mapping with with additional extension methods specifically for use with AutoMapper.
• the rest of the "Sparky suite" of .NET utilities and test helpers

This package enables an alternate, less verbose syntax for some of the functions that "dot on" to AutoMapper "ForMember" functions, including .MapFrom, .NullSubstitute, .UseValue and .Ignore.

Without SparkyTools.AutoMapper:

    Mapper.Initialize(cfg => 
        cfg.CreateMap<Foo, Bar>()
            .ForMember(dest => dest.Status, opt => opt.MapFrom(src => src.StatusCode))
            .ForMember(dest => dest.Comments, opt => opt.NullSubstitute("(none)"))
            .ForMember(dest => dest.IsImportant, opt => opt.UseValue(true))
            .ForMember(dest => dest.UniqueId, opt => opt.UseValue(Guid.NewGuid()))
            .ForMember(dest => dest.Useless, opt => opt.Ignore());

With SparkyTools.AutoMapper:

using SparkyTools.AutoMapper;

    Mapper.Initialize(cfg => 
        cfg.CreateMap<Foo, Bar>()
            .ForMember(dest => dest.Status).MapFrom(src => src.StatusCode)
            .ForMember(dest => dest.Comments).NullSubstitute("(none)")
            .ForMember(dest => dest.IsImportant).UseValue(true)
            .ForMember(dest => dest.UniqueId).UseValue(Guid.NewGuid())
            .ForMember(dest => dest.Useless).Ignore();

Ignoring members can be simplified even further.

.ForMember(dest => dest.Useless).Ignore()

can be coded as:

.IgnoreMember(dest => dest.Useless)

...or, to ignore multiple members:

.IgnoringMembers(dest => dest.Useless, dest => dest.Useless2, dest => dest.Useless3)

MappedTo extension methods

The package also contains an extension method that allows you to replace

    Bar bar = Mapper.Map<Foo, Bar>(foo); // with static Mapper
    Bar bar = mapper.Map<foo, Bar>(foo): // with IMapper instance

with:

    Bar bar = foo.MappedTo<Bar>(); // with static Mapper
    Bar bar = foo.MappedTo<Bar>(mapper); // with IMapper instance

AutoMapperConfigurationValidity

The Assert methods in this static class wrap Mapper.AssertConfigurationIsValid and IConfigurationProvider.AssertConfigurationIsValid with an exception handler that provides suggestions for dealing with unmapped properties.