1use super::NaiveTime;
2use core::fmt;
3use serde::{de, ser};
4
5// TODO not very optimized for space (binary formats would want something better)
6// TODO round-trip for general leap seconds (not just those with second = 60)
7
8impl ser::Serialize for NaiveTime {
9 fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
10 where
11 S: ser::Serializer,
12 {
13 serializer.collect_str(&self)
14 }
15}
16
17struct NaiveTimeVisitor;
18
19impl de::Visitor<'_> for NaiveTimeVisitor {
20 type Value = NaiveTime;
21
22 fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
23 formatter.write_str(data:"a formatted time string")
24 }
25
26 fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
27 where
28 E: de::Error,
29 {
30 value.parse().map_err(E::custom)
31 }
32}
33
34impl<'de> de::Deserialize<'de> for NaiveTime {
35 fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
36 where
37 D: de::Deserializer<'de>,
38 {
39 deserializer.deserialize_str(visitor:NaiveTimeVisitor)
40 }
41}
42
43#[cfg(test)]
44mod tests {
45 use crate::NaiveTime;
46
47 #[test]
48 fn test_serde_serialize() {
49 assert_eq!(
50 serde_json::to_string(&NaiveTime::from_hms_opt(0, 0, 0).unwrap()).ok(),
51 Some(r#""00:00:00""#.into())
52 );
53 assert_eq!(
54 serde_json::to_string(&NaiveTime::from_hms_milli_opt(0, 0, 0, 950).unwrap()).ok(),
55 Some(r#""00:00:00.950""#.into())
56 );
57 assert_eq!(
58 serde_json::to_string(&NaiveTime::from_hms_milli_opt(0, 0, 59, 1_000).unwrap()).ok(),
59 Some(r#""00:00:60""#.into())
60 );
61 assert_eq!(
62 serde_json::to_string(&NaiveTime::from_hms_opt(0, 1, 2).unwrap()).ok(),
63 Some(r#""00:01:02""#.into())
64 );
65 assert_eq!(
66 serde_json::to_string(&NaiveTime::from_hms_nano_opt(3, 5, 7, 98765432).unwrap()).ok(),
67 Some(r#""03:05:07.098765432""#.into())
68 );
69 assert_eq!(
70 serde_json::to_string(&NaiveTime::from_hms_opt(7, 8, 9).unwrap()).ok(),
71 Some(r#""07:08:09""#.into())
72 );
73 assert_eq!(
74 serde_json::to_string(&NaiveTime::from_hms_micro_opt(12, 34, 56, 789).unwrap()).ok(),
75 Some(r#""12:34:56.000789""#.into())
76 );
77 let leap = NaiveTime::from_hms_nano_opt(23, 59, 59, 1_999_999_999).unwrap();
78 assert_eq!(serde_json::to_string(&leap).ok(), Some(r#""23:59:60.999999999""#.into()));
79 }
80
81 #[test]
82 fn test_serde_deserialize() {
83 let from_str = serde_json::from_str::<NaiveTime>;
84
85 assert_eq!(from_str(r#""00:00:00""#).ok(), Some(NaiveTime::from_hms_opt(0, 0, 0).unwrap()));
86 assert_eq!(from_str(r#""0:0:0""#).ok(), Some(NaiveTime::from_hms_opt(0, 0, 0).unwrap()));
87 assert_eq!(
88 from_str(r#""00:00:00.950""#).ok(),
89 Some(NaiveTime::from_hms_milli_opt(0, 0, 0, 950).unwrap())
90 );
91 assert_eq!(
92 from_str(r#""0:0:0.95""#).ok(),
93 Some(NaiveTime::from_hms_milli_opt(0, 0, 0, 950).unwrap())
94 );
95 assert_eq!(
96 from_str(r#""00:00:60""#).ok(),
97 Some(NaiveTime::from_hms_milli_opt(0, 0, 59, 1_000).unwrap())
98 );
99 assert_eq!(from_str(r#""00:01:02""#).ok(), Some(NaiveTime::from_hms_opt(0, 1, 2).unwrap()));
100 assert_eq!(
101 from_str(r#""03:05:07.098765432""#).ok(),
102 Some(NaiveTime::from_hms_nano_opt(3, 5, 7, 98765432).unwrap())
103 );
104 assert_eq!(from_str(r#""07:08:09""#).ok(), Some(NaiveTime::from_hms_opt(7, 8, 9).unwrap()));
105 assert_eq!(
106 from_str(r#""12:34:56.000789""#).ok(),
107 Some(NaiveTime::from_hms_micro_opt(12, 34, 56, 789).unwrap())
108 );
109 assert_eq!(
110 from_str(r#""23:59:60.999999999""#).ok(),
111 Some(NaiveTime::from_hms_nano_opt(23, 59, 59, 1_999_999_999).unwrap())
112 );
113 assert_eq!(
114 from_str(r#""23:59:60.9999999999997""#).ok(), // excess digits are ignored
115 Some(NaiveTime::from_hms_nano_opt(23, 59, 59, 1_999_999_999).unwrap())
116 );
117
118 // bad formats
119 assert!(from_str(r#""""#).is_err());
120 assert!(from_str(r#""000000""#).is_err());
121 assert!(from_str(r#""00:00:61""#).is_err());
122 assert!(from_str(r#""00:60:00""#).is_err());
123 assert!(from_str(r#""24:00:00""#).is_err());
124 assert!(from_str(r#""23:59:59,1""#).is_err());
125 assert!(from_str(r#""012:34:56""#).is_err());
126 assert!(from_str(r#""hh:mm:ss""#).is_err());
127 assert!(from_str(r#"0"#).is_err());
128 assert!(from_str(r#"86399"#).is_err());
129 assert!(from_str(r#"{}"#).is_err());
130 }
131
132 #[test]
133 fn test_serde_bincode() {
134 // Bincode is relevant to test separately from JSON because
135 // it is not self-describing.
136 use bincode::{deserialize, serialize};
137
138 let t = NaiveTime::from_hms_nano_opt(3, 5, 7, 98765432).unwrap();
139 let encoded = serialize(&t).unwrap();
140 let decoded: NaiveTime = deserialize(&encoded).unwrap();
141 assert_eq!(t, decoded);
142 }
143}
144