#[cfg(feature = "serde")]
mod serde_tests {

    use ndhistogram::{
        axis::{Category, CategoryNoFlow, Uniform, UniformNoFlow, Variable, VariableNoFlow},
        ndhistogram,
        value::{Mean, Sum, WeightedMean, WeightedSum},
        Hist1D, HistND, Histogram,
    };
    use rand::{prelude::StdRng, Rng, SeedableRng};

    macro_rules! test_serialize_empty_impl {
        ($fnname:ident; $Type:ty; $construct:expr) => {
            #[allow(clippy::type_complexity)]
            #[test]
            fn $fnname() {
                let hist: $Type = $construct;
                let serialized = serde_json::to_string(&hist).unwrap();
                let deserialized: $Type = serde_json::from_str(&serialized).unwrap();
                assert_eq!(hist, deserialized)
            }
        };
    }

    test_serialize_empty_impl! {
        test_serialized_vec_histogram_1d_f64;
        Hist1D<Uniform>;
        ndhistogram!(Uniform::new(10, -5.0, 5.0).unwrap(); f64)
    }

    test_serialize_empty_impl! {
        test_serialized_vec_histogram_6d_f64;
        HistND<(Uniform, Variable<i32>, Category<&str>, UniformNoFlow, VariableNoFlow<i32>, CategoryNoFlow<&str>)>;
        ndhistogram!(
            Uniform::new(10, -5.0, 5.0).unwrap(),
            Variable::new(vec![0, 2, 4, 8, 16]).unwrap(),
            Category::new(vec!["A", "B", "C"]),
            UniformNoFlow::new(10, -5.0, 5.0).unwrap(),
            VariableNoFlow::new(vec![0, 2, 4, 8, 16]).unwrap(),
            CategoryNoFlow::new(vec!["A", "B", "C"]),
            ; f64
        )
    }

    macro_rules! test_serialize_filled_value_impl {
    ($fnname:ident; $Type:ty; $hist:ident; $rng:ident; $fillexpr:expr) => {
        #[test]
        fn $fnname() {
            let mut $hist: Hist1D<Uniform, $Type> = ndhistogram!(Uniform::new(10, -5.0, 5.0).unwrap(); $Type);
            let mut $rng = StdRng::seed_from_u64(123);
            (0..1000).for_each(|_| $fillexpr);
            let serialized = serde_json::to_string(&$hist).unwrap();
            let deserialized: Hist1D<Uniform, $Type> = serde_json::from_str(&serialized).unwrap();
            assert_eq!($hist, deserialized)
        }
    }
}

    test_serialize_filled_value_impl! {
        test_serialized_vec_histogram_1d_sum;
        Sum;
        hist;
        rng; hist.fill(&rng.gen_range(-6.0..6.0))
    }

    test_serialize_filled_value_impl! {
        test_serialized_vec_histogram_1d_weightedsum;
        WeightedSum;
        hist;
        rng;
        hist.fill_with(&rng.gen_range(-6.0..6.0), rng.gen_range(0.0..10.0))
    }

    test_serialize_filled_value_impl! {
        test_serialized_vec_histogram_1d_mean;
        Mean<i64, i64>;
        hist;
        rng;
        hist.fill_with(&rng.gen_range(-6.0..6.0), rng.gen_range(0..10))
    }

    test_serialize_filled_value_impl! {
        test_serialized_vec_histogram_1d_weightedmean;
        WeightedMean<i64, i64, i64>;
        hist;
        rng;
        hist.fill_with_weighted(&rng.gen_range(-6.0..6.0), rng.gen_range(0..10), rng.gen_range(0..10))
    }
}