serde_qs_ext 0.12.0

#[macro_use]
extern crate serde_derive;
extern crate serde_qs as qs;

#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
struct Address {
    city: String,
    street: String,
    postcode: String,
}

#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
struct QueryParams {
    id: u8,
    name: String,
    phone: u32,
    address: Address,
    user_ids: Vec<u8>,
}

#[test]
fn serialize_struct() {
    let params = QueryParams {
        id: 42,
        name: "Acme".to_string(),
        phone: 12345,
        address: Address {
            city: "Carrot City".to_string(),
            street: "Special-Street* No. 11".to_string(),
            postcode: "12345".to_string(),
        },
        user_ids: vec![1, 2, 3, 4],
    };

    assert_eq!(
        qs::to_string(&params).unwrap(),
        "\
         id=42&name=Acme&phone=12345&address[city]=Carrot+City&\
         address[street]=Special-Street*+No.+11&\
         address[postcode]=12345&user_ids[0]=1&user_ids[1]=2&\
         user_ids[2]=3&user_ids[3]=4"
    );
}

#[test]
fn serialize_option() {
    #[derive(Debug, Serialize, Deserialize, PartialEq)]
    struct Query {
        vec: Option<Vec<u8>>,
    }

    let params = "";
    let query = Query { vec: None };
    let rec_params = qs::to_string(&query).unwrap();
    assert_eq!(rec_params, params);

    let params = "vec[0]=1&vec[1]=2";
    let query = Query {
        vec: Some(vec![1, 2]),
    };
    let rec_params = qs::to_string(&query).unwrap();
    assert_eq!(rec_params, params);
}

#[test]
fn serialize_enum() {
    #[derive(Debug, Serialize, Deserialize, PartialEq)]
    #[serde(rename_all = "lowercase")]
    enum TestEnum {
        A,
        B(bool),
        C { x: u8, y: u8 },
        D(u8, u8),
    }

    #[derive(Debug, Serialize, Deserialize, PartialEq)]
    struct Query {
        e: TestEnum,
    }

    let params = "e=a";
    let query = Query { e: TestEnum::A };
    let rec_params = qs::to_string(&query).unwrap();
    assert_eq!(rec_params, params);

    let params = "e[b]=true";
    let query = Query {
        e: TestEnum::B(true),
    };
    let rec_params = qs::to_string(&query).unwrap();
    assert_eq!(rec_params, params);

    let params = "e[c][x]=2&e[c][y]=3";
    let query = Query {
        e: TestEnum::C { x: 2, y: 3 },
    };
    let rec_params = qs::to_string(&query).unwrap();
    assert_eq!(rec_params, params);

    let params = "e[d][0]=128&e[d][1]=1";
    let query = Query {
        e: TestEnum::D(128, 1),
    };
    let rec_params = qs::to_string(&query).unwrap();
    assert_eq!(rec_params, params);
}

#[test]
fn serialize_flatten() {
    #[derive(Deserialize, Serialize, Debug, PartialEq)]
    struct Query {
        a: u8,
        #[serde(flatten)]
        common: CommonParams,
    }

    #[derive(Deserialize, Serialize, Debug, PartialEq)]
    struct CommonParams {
        limit: u64,
        offset: u64,
    }

    let params = "a=1&limit=100&offset=50";
    let query = Query {
        a: 1,
        common: CommonParams {
            limit: 100,
            offset: 50,
        },
    };
    let rec_params = qs::to_string(&query).unwrap();
    assert_eq!(rec_params, params);
}

#[test]
fn serialize_map_with_unit_enum_keys() {
    use std::collections::HashMap;

    #[derive(Serialize, Eq, PartialEq, Hash)]
    enum Operator {
        Lt,
        Gt,
    }

    #[derive(Serialize)]
    struct Filter {
        point: HashMap<Operator, u64>,
    }

    let mut map = HashMap::new();
    map.insert(Operator::Gt, 123);
    map.insert(Operator::Lt, 321);
    let test = Filter { point: map };

    let query = qs::to_string(&test).unwrap();

    assert!(query == "point[Lt]=321&point[Gt]=123" || query == "point[Gt]=123&point[Lt]=321");
}

#[test]
fn serialize_bytes() {
    struct Bytes(&'static [u8]);

    #[derive(Serialize)]
    struct Query {
        bytes: Bytes,
    }

    impl serde::Serialize for Bytes {
        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
        where
            S: serde::Serializer,
        {
            serializer.serialize_bytes(self.0)
        }
    }
    let bytes = Bytes(b"hello, world!");
    let s = qs::to_string(&Query { bytes }).unwrap();
    assert_eq!(s, "bytes=hello%2C+world%21");
}

#[test]
fn serialize_hashmap_keys() {
    // Issue: https://github.com/samscott89/serde_qs/issues/45

    #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
    struct HashParams {
        attrs: std::collections::HashMap<String, String>,
    }

    let data = HashParams {
        attrs: vec![
            ("key 1!".to_owned(), "val 1".to_owned()),
            ("key 2!".to_owned(), "val 2".to_owned()),
        ]
        .into_iter()
        .collect(),
    };
    let s = qs::to_string(&data).unwrap();
    assert!(
        s == "attrs[key+1%21]=val+1&attrs[key+2%21]=val+2"
            || s == "attrs[key+2%21]=val+2&attrs[key+1%21]=val+1"
    );
}

#[test]
fn test_serializer() {
    use serde::Serialize;
    #[derive(Serialize, Debug, Clone)]
    struct Query {
        a: Vec<u8>,
        b: &'static str,
    }

    let mut writer = Vec::new();
    {
        let serializer = &mut qs::Serializer::new(&mut writer);
        let q = Query {
            a: vec![0, 1],
            b: "b",
        };
        q.serialize(serializer).unwrap();
    }

    assert_eq!(writer, b"a[0]=0&a[1]=1&b=b");
    writer.clear();

    {
        let serializer = &mut qs::Serializer::new(&mut writer);
        let q = Query {
            a: vec![3, 2],
            b: "a",
        };
        q.serialize(serializer).unwrap();
    }

    assert_eq!(writer, b"a[0]=3&a[1]=2&b=a");
}

#[test]
fn test_serializer_unit() {
    use serde::Serialize;
    #[derive(Serialize)]
    struct A;
    #[derive(Serialize)]
    struct B {
        t: (),
    }

    let mut writer = Vec::new();
    {
        let serializer = &mut qs::Serializer::new(&mut writer);
        // allow this clippy lints cause I like how explicit the test is
        #[allow(clippy::let_unit_value)]
        let q = ();
        q.serialize(serializer).unwrap();
    }

    assert_eq!(writer, b"", "we are testing ()");
    writer.clear();

    {
        let serializer = &mut qs::Serializer::new(&mut writer);
        let q = A;
        q.serialize(serializer).unwrap();
    }

    assert_eq!(writer, b"", "we are testing A");
    writer.clear();

    {
        let serializer = &mut qs::Serializer::new(&mut writer);
        let q = B { t: () };
        q.serialize(serializer).unwrap();
    }

    assert_eq!(writer, b"t=", "we are testing B{{t: ()}}");
}