DataMapperTests.cs

    public class DataMapperTests
    {

        [TestFixture]
        public class WhenMap
        {
            internal class Source
            {
                public int id { get; set; }
            }

            internal class Destination
            {
                public int id { get; set; }
            }

            [SetUp]
            public void Setup()
            {
                Mapper.Reset();
            }

            [Test]
            public void ThenShouldMapSourceTypeToDestinationTypeGivenConfigured()
            {
                // Arrange
                Mapper.CreateMap<Source, Destination>();
                var mapper = new DataMapper(Mapper.Engine);

                //Act
                const int id = 1;
                var destination = mapper.Map<Destination>(new Source {id = id});

                //Assert
                Assert.That(destination.id, Is.EqualTo(id));
            }
            [Test] 
            public void ThenShouldThrowAutoMapperMappingExceptionGivenNotConfigured()
            {
                // Arrange
                var mapper = new DataMapper(Mapper.Engine);
                var source = new Source { id = 1 };

                //Act //Assert
                Assert.Throws<AutoMapperMappingException>(() => mapper.Map<Destination>(source));
            }
        }
 
    }