public void SupportsParmeterization_DoesNotCacheParameter() { // Arrange int value = 0; Expression<Func<SourceWithParams, int>> sourceMember = src => value + 5; var config = new MapperConfiguration(cfg => cfg.CreateMap<SourceWithParams, DestWithParams>() .ForMember(dest => dest.Value, opt => opt.MapFrom(sourceMember))); var mapper = new Mapper(config); var source = new[] { new SourceWithParams() }.AsQueryable(); // Act var result1 = source.UseAsDataSource(mapper).For<DestWithParams>(new Dictionary<string, object> { { "value", 10 } }).ToArray(); var result = source.UseAsDataSource(mapper).For<DestWithParams>(new Dictionary<string, object> { { "value", 15 } }).ToArray(); // Assert result.ShouldNotBeNull(); result.ShouldNotBeEmpty(); result.Single().Value.ShouldEqual(20); }