junobuild_utils/serializers/
bigint.rs

1use crate::serializers::types::DocDataBigInt;
2use serde::de::{self, MapAccess, Visitor};
3use serde::ser::SerializeStruct;
4use serde::{Deserialize, Deserializer, Serialize, Serializer};
5use std::fmt;
6
7impl fmt::Display for DocDataBigInt {
8    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
9        write!(f, "{}", self.value)
10    }
11}
12
13impl Serialize for DocDataBigInt {
14    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
15    where
16        S: Serializer,
17    {
18        let mut state = serializer.serialize_struct("DocDataBigInt", 1)?;
19        state.serialize_field("__bigint__", &self.value.to_string())?;
20        state.end()
21    }
22}
23
24impl<'de> Deserialize<'de> for DocDataBigInt {
25    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
26    where
27        D: Deserializer<'de>,
28    {
29        deserializer.deserialize_struct("DocDataBigInt", &["__bigint__"], DocDataBigIntVisitor)
30    }
31}
32
33struct DocDataBigIntVisitor;
34
35impl<'de> Visitor<'de> for DocDataBigIntVisitor {
36    type Value = DocDataBigInt;
37
38    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
39        formatter.write_str("an object with a key __bigint__")
40    }
41
42    fn visit_map<V>(self, mut map: V) -> Result<DocDataBigInt, V::Error>
43    where
44        V: MapAccess<'de>,
45    {
46        let mut value = None;
47        while let Some(key) = map.next_key::<String>()? {
48            if key == "__bigint__" {
49                if value.is_some() {
50                    return Err(de::Error::duplicate_field("__bigint__"));
51                }
52                value = Some(map.next_value::<String>()?);
53            }
54        }
55        let value_str = value.ok_or_else(|| de::Error::missing_field("__bigint__"))?;
56        let bigint_value = value_str
57            .parse::<u64>()
58            .map_err(|_| de::Error::custom("Invalid format for __bigint__"))?;
59        Ok(DocDataBigInt {
60            value: bigint_value,
61        })
62    }
63}
64
65#[cfg(test)]
66mod tests {
67    use super::*;
68    use serde_json::{self};
69
70    #[test]
71    fn serialize_doc_data_bigint() {
72        let data = DocDataBigInt {
73            value: 12345678901234,
74        };
75        let s = serde_json::to_string(&data).expect("serialize");
76        assert_eq!(s, r#"{"__bigint__":"12345678901234"}"#);
77    }
78
79    #[test]
80    fn deserialize_doc_data_bigint() {
81        let s = r#"{"__bigint__":"12345678901234"}"#;
82        let data: DocDataBigInt = serde_json::from_str(s).expect("deserialize");
83        assert_eq!(data.value, 12345678901234);
84    }
85
86    #[test]
87    fn round_trip() {
88        let original = DocDataBigInt { value: u64::MAX };
89        let json = serde_json::to_string(&original).unwrap();
90        let decoded: DocDataBigInt = serde_json::from_str(&json).unwrap();
91        assert_eq!(decoded.value, original.value);
92    }
93
94    #[test]
95    fn error_on_missing_field() {
96        let err = serde_json::from_str::<DocDataBigInt>(r#"{}"#).unwrap_err();
97        assert!(
98            err.to_string().contains("missing field `__bigint__`"),
99            "got: {err}"
100        );
101    }
102
103    #[test]
104    fn error_on_duplicate_field() {
105        let s = r#"{"__bigint__":"123","__bigint__":"456"}"#;
106        let err = serde_json::from_str::<DocDataBigInt>(s).unwrap_err();
107        assert!(
108            err.to_string().contains("duplicate field `__bigint__`"),
109            "got: {err}"
110        );
111    }
112
113    #[test]
114    fn error_on_invalid_bigint_format() {
115        let s = r#"{"__bigint__":"not-a-number"}"#;
116        let err = serde_json::from_str::<DocDataBigInt>(s).unwrap_err();
117        assert!(
118            err.to_string().contains("Invalid format for __bigint__"),
119            "got: {err}"
120        );
121    }
122
123    #[test]
124    fn test_display_implementation() {
125        let data = DocDataBigInt {
126            value: 12345678901234,
127        };
128        assert_eq!(format!("{}", data), "12345678901234");
129    }
130}
junobuild_utils/serializers/bigint.rs

junobuild_utils/serializers/
bigint.rs
