public void CreatePatch() { var mapper = new ApiUnitMeasureModelMapper(); var model = new ApiUnitMeasureRequestModel(); model.SetProperties(DateTime.Parse("1/1/1987 12:00:00 AM"), "A"); JsonPatchDocument <ApiUnitMeasureRequestModel> patch = mapper.CreatePatch(model); var response = new ApiUnitMeasureRequestModel(); patch.ApplyTo(response); response.ModifiedDate.Should().Be(DateTime.Parse("1/1/1987 12:00:00 AM")); response.Name.Should().Be("A"); }