#[cfg(feature = "nativeshell_derive")]
mod tests {
    use std::collections::HashMap;

    use nativeshell_core::{IntoValue, TryFromError, TryFromValue, Value};

    #[derive(PartialEq, Debug, Clone)]
    struct Unserializable {}

    #[derive(PartialEq, IntoValue, TryFromValue, Debug, Clone)]
    enum Enum1DefaultTag<
        T: std::fmt::Debug + PartialEq + Into<Value> + TryFrom<Value, Error = E>,
        E: Into<TryFromError> + PartialEq,
    > {
        Unit1,
        #[nativeshell(rename = "yyy")]
        Unit2,
        SingleValue(String),
        DoubleValue(String, String),
        SingleValueT(T),
        DoubleValueT(T, T),
        #[nativeshell(skip)]
        _Unserializable(Unserializable),
        #[nativeshell(rename = "_Xyz")]
        Xyz {
            #[nativeshell(rename = "xabc")]
            a: String,
            #[nativeshell(skip)]
            b: i64,
            c: Value,
            d: T,
        },
    }

    #[test]
    fn test_enum_1() -> Result<(), TryFromError> {
        {
            let v1: Enum1DefaultTag<i64, _> = Enum1DefaultTag::Unit1;
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, "Unit1".into());
            let v1d: Enum1DefaultTag<i64, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: Enum1DefaultTag<i64, _> = Enum1DefaultTag::Unit2;
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, "yyy".into());
            let v1d: Enum1DefaultTag<i64, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: Enum1DefaultTag<i64, _> = Enum1DefaultTag::SingleValue("Hello".into());
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(vec![("SingleValue".into(), "Hello".into())].into())
            );
            let v1d: Enum1DefaultTag<i64, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: Enum1DefaultTag<i64, _> =
                Enum1DefaultTag::DoubleValue("Hello".into(), "Hello2".into());
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![(
                        "DoubleValue".into(),
                        Value::List(vec!["Hello".into(), "Hello2".into()].into())
                    )]
                    .into()
                )
            );
            let v1d: Enum1DefaultTag<i64, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: Enum1DefaultTag<String, _> = Enum1DefaultTag::SingleValueT("String".into());
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(vec![("SingleValueT".into(), "String".into())].into())
            );
            let v1d: Enum1DefaultTag<String, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: Enum1DefaultTag<Value, _> = Enum1DefaultTag::SingleValueT(Value::I64(10));
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(vec![("SingleValueT".into(), Value::I64(10))].into())
            );
            let v1d: Enum1DefaultTag<Value, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: Enum1DefaultTag<String, _> =
                Enum1DefaultTag::DoubleValueT("Hello".into(), "Hello2".into());
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![(
                        "DoubleValueT".into(),
                        Value::List(vec!["Hello".into(), "Hello2".into()].into())
                    )]
                    .into()
                )
            );
            let v1d: Enum1DefaultTag<String, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: Enum1DefaultTag<Value, _> =
                Enum1DefaultTag::DoubleValueT(10i64.into(), 11i64.into());
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![(
                        "DoubleValueT".into(),
                        Value::List(vec![Value::I64(10), Value::I64(11)])
                    )]
                    .into()
                )
            );
            let v1d: Enum1DefaultTag<Value, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let mut v1 = Enum1DefaultTag::Xyz {
                a: "String".into(),
                b: 10.into(),
                c: Value::F64(10.5),
                d: 15i64,
            };
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![(
                        "_Xyz".into(),
                        Value::Map(
                            vec![
                                ("xabc".into(), "String".into()),
                                ("d".into(), 15i64.into()),
                                ("c".into(), Value::F64(10.5)),
                            ]
                            .into()
                        )
                    )]
                    .into()
                )
            );
            let v1d: Enum1DefaultTag<i64, _> = sv1.try_into()?;
            assert_ne!(v1, v1d);
            match &mut v1 {
                Enum1DefaultTag::Xyz {
                    a: _,
                    b,
                    c: _,
                    d: _,
                } => {
                    *b = 0;
                }
                _ => {}
            }
            assert_eq!(v1, v1d);
        }
        Ok(())
    }

    #[derive(PartialEq, IntoValue, TryFromValue, Debug, Clone)]
    #[nativeshell(tag = "t")]
    enum Enum2CustomTag {
        Abc,
        #[nativeshell(rename = "_Def")]
        Def,
        #[nativeshell(rename_all = "UPPERCASE")]
        Xyz {
            x: i64,
            s: String,
        },
    }

    #[test]
    fn test_enum_2() -> Result<(), TryFromError> {
        {
            let v1 = Enum2CustomTag::Abc;
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::Map(vec![("t".into(), "Abc".into())].into()));
            let v1d: Enum2CustomTag = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = Enum2CustomTag::Def;
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::Map(vec![("t".into(), "_Def".into())].into()));
            let v1d: Enum2CustomTag = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = Enum2CustomTag::Xyz {
                x: 15,
                s: "Hello".into(),
            };
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        ("t".into(), "Xyz".into()),
                        ("X".into(), 15.into()),
                        ("S".into(), "Hello".into())
                    ]
                    .into()
                )
            );
            let v1d: Enum2CustomTag = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        Ok(())
    }

    #[derive(PartialEq, IntoValue, TryFromValue, Debug, Clone)]
    #[nativeshell(tag = "t", content = "c")]
    #[nativeshell(rename_all = "UPPERCASE")]
    enum Enum3CustomTagContent {
        Abc,
        #[nativeshell(rename = "_Def")]
        Def,
        SingleValue(i64),
        #[nativeshell(rename = "_DoubleValue")]
        DoubleValue(f64, f64),
        Xyz {
            x: i64,
            s: String,
            z1: Option<i64>,
            #[nativeshell(skip_if_empty)]
            z2: Option<i64>,
            z3: Option<f64>,
        },
    }

    #[test]
    fn test_enum_3() -> Result<(), TryFromError> {
        {
            let v1 = Enum3CustomTagContent::Abc;
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::Map(vec![("t".into(), "ABC".into())].into()));
            let v1d: Enum3CustomTagContent = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = Enum3CustomTagContent::Def;
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::Map(vec![("t".into(), "_Def".into())].into()));
            let v1d: Enum3CustomTagContent = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = Enum3CustomTagContent::SingleValue(10);
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        ("t".into(), "SINGLEVALUE".into()), //
                        ("c".into(), 10i64.into()),
                    ]
                    .into()
                )
            );
            let v1d: Enum3CustomTagContent = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = Enum3CustomTagContent::DoubleValue(10.5, 11.5);
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        ("t".into(), "_DoubleValue".into()), //
                        (
                            "c".into(),
                            Value::List(vec![10.5f64.into(), 11.5f64.into()])
                        ),
                    ]
                    .into()
                )
            );
            let v1d: Enum3CustomTagContent = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = Enum3CustomTagContent::Xyz {
                x: 15,
                s: "hello".into(),
                z1: None,
                z2: None,
                z3: Some(10.5f64),
            };
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        ("t".into(), "XYZ".into()), //
                        (
                            "c".into(),
                            Value::Map(
                                vec![
                                    ("x".into(), 15.into()), //
                                    ("s".into(), "hello".into()),
                                    ("z1".into(), Value::Null),
                                    ("z3".into(), 10.5.into())
                                ]
                                .into()
                            )
                        ),
                    ]
                    .into()
                )
            );
            let v1d: Enum3CustomTagContent = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        Ok(())
    }

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewType1(i64);
    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewType2(Value);
    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewType3(Option<i64>);

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewType4(NewType1);
    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewTypeInStruct {
        v: NewType1,
    }

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewTypeStruct {
        x: i64,
        y: String,
    }
    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewTypeWithStruct(NewTypeStruct);

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct NewTypeGeneric<
        T: std::fmt::Debug + PartialEq + Into<Value> + TryFrom<Value, Error = E>,
        E: Into<TryFromError> + PartialEq,
    >(T);

    #[test]
    fn test_new_type() -> Result<(), TryFromError> {
        {
            let v1 = NewType1(10);
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::I64(10));
            let v1d: NewType1 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = NewType2(Value::String("Hello".into()));
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::String("Hello".into()));
            let v1d: NewType2 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = NewType3(Some(10.into()));
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::I64(10));
            let v1d: NewType3 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = NewType3(None);
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::Null);
            let v1d: NewType3 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = NewType4(NewType1(15));
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::I64(15));
            let v1d: NewType4 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = NewTypeInStruct { v: NewType1(15) };
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::Map(vec![("v".into(), 15.into())].into()));
            let v1d: NewTypeInStruct = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = NewTypeWithStruct(NewTypeStruct {
                x: 10,
                y: "Hello".into(),
            });
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        ("x".into(), 10.into()), //
                        ("y".into(), "Hello".into())
                    ]
                    .into()
                )
            );
            let v1d: NewTypeWithStruct = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = NewTypeGeneric(10i64);
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, 10i64.into());
            let v1d: NewTypeGeneric<i64, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        Ok(())
    }

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct Tuple1(i64, Option<String>, Value);

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct TupleGeneric<
        T: std::fmt::Debug + PartialEq + Into<Value> + TryFrom<Value, Error = E>,
        E: Into<TryFromError> + PartialEq,
    >(i64, Option<T>, Value, T);

    #[test]
    fn test_tuple() -> Result<(), TryFromError> {
        {
            let v1 = Tuple1(10, None, Value::Bool(false));
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::List(vec![10i64.into(), Value::Null, false.into()])
            );
            let v1d: Tuple1 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = Tuple1(10, Some("Hello".into()), Value::Bool(false));
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::List(vec![10i64.into(), "Hello".into(), false.into()])
            );
            let v1d: Tuple1 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = TupleGeneric(10, Some("Hello".into()), Value::Bool(false), "S2".into());
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::List(vec![
                    10i64.into(),
                    "Hello".into(),
                    false.into(),
                    "S2".into()
                ])
            );
            let v1d: TupleGeneric<String, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = TupleGeneric(10, None, Value::Bool(false), "S2".into());
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::List(vec![10i64.into(), Value::Null, false.into(), "S2".into()])
            );
            let v1d: TupleGeneric<String, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        Ok(())
    }

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    enum EnumInStruct1 {
        Value,
        Value2,
    }

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct Struct1 {
        s1: String,
        i: Option<i64>,
        #[nativeshell(rename = "abc")]
        v: Value,
        v2: Option<Value>,
        e: EnumInStruct1,
        e2: Option<EnumInStruct1>,
        #[nativeshell(skip_if_empty)]
        e3: Option<EnumInStruct1>,
        e4: Option<EnumInStruct1>,
    }

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    #[nativeshell(rename_all = "UPPERCASE")]
    struct StructGeneric<
        T: std::fmt::Debug + PartialEq + Into<Value> + TryFrom<Value, Error = E>,
        E: Into<TryFromError> + PartialEq,
    > {
        t: T,
        t2: Option<T>,
        #[nativeshell(skip_if_empty)]
        t3: Option<T>,
        #[nativeshell(rename = "_T4")]
        t4: Option<T>,
    }

    // Special behavior - skip_if_empty with Option<Value> will preserve Value::Null.
    // Normally Value::Null would deserialize as None, however in this particular case
    // it will deserialize as Some(Value::Null)
    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct StructOptionalValue {
        #[nativeshell(skip_if_empty)]
        v1: Option<Value>,
        #[nativeshell(skip_if_empty)]
        v2: Option<Value>,
    }

    #[derive(Clone, PartialEq, Debug, IntoValue, TryFromValue)]
    struct StructWithMap {
        map: HashMap<Value, Value>,
        map2: HashMap<i64, String>,
    }

    #[test]
    fn test_struct() -> Result<(), TryFromError> {
        {
            let v1 = Struct1 {
                s1: "Hello".into(),
                i: Some(5),
                v: Value::I64(10),
                v2: None,
                e: EnumInStruct1::Value,
                e2: Some(EnumInStruct1::Value2),
                e3: None,
                e4: None,
            };
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        ("s1".into(), "Hello".into()), //
                        ("i".into(), 5.into()),
                        ("abc".into(), 10.into()),
                        ("v2".into(), Value::Null),
                        ("e".into(), "Value".into()),
                        ("e2".into(), "Value2".into()),
                        ("e4".into(), Value::Null),
                    ]
                    .into()
                ),
            );
            let v1d: Struct1 = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1: StructGeneric<String, _> = StructGeneric {
                t: "Hello".into(),
                t2: Some("Hello2".into()),
                t3: None,
                t4: None,
            };
            let sv1: Value = v1.clone().into();
            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        ("T".into(), "Hello".into()), //
                        ("T2".into(), "Hello2".into()),
                        ("_T4".into(), Value::Null),
                    ]
                    .into()
                ),
            );
            let v1d: StructGeneric<String, _> = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let v1 = StructOptionalValue {
                v1: None,
                v2: Some(Value::Null),
            };
            let sv1: Value = v1.clone().into();
            assert_eq!(sv1, Value::Map(vec![("v2".into(), Value::Null),].into()),);
            let v1d: StructOptionalValue = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        {
            let mut map = HashMap::<Value, Value>::new();
            map.insert("key".into(), 100i64.into());
            map.insert(10f64.into(), "Value".into());

            let mut map2 = HashMap::<i64, String>::new();
            map2.insert(10, "Hello".into());
            map2.insert(20, "World".into());

            let v1 = StructWithMap { map, map2 };
            let sv1: Value = v1.clone().into();

            assert_eq!(
                sv1,
                Value::Map(
                    vec![
                        (
                            "map".into(),
                            Value::Map(
                                vec![
                                    ("key".into(), 100i64.into()), //
                                    (10f64.into(), "Value".into()),
                                ]
                                .into()
                            )
                        ),
                        (
                            "map2".into(),
                            Value::Map(
                                vec![
                                    (10i64.into(), "Hello".into()), //
                                    (20i64.into(), "World".into()),
                                ]
                                .into()
                            )
                        )
                    ]
                    .into()
                )
            );
            let v1d: StructWithMap = sv1.try_into()?;
            assert_eq!(v1d, v1);
        }
        Ok(())
    }
}