zod_rs/schema/
null.rs

1use crate::schema::Schema;
2use serde_json::Value;
3use zod_rs_util::{ValidateResult, ValidationError, ValidationType};
4
5#[derive(Debug, Clone)]
6pub struct NullSchema;
7
8impl NullSchema {
9    pub fn new() -> Self {
10        Self
11    }
12}
13
14impl Default for NullSchema {
15    fn default() -> Self {
16        Self::new()
17    }
18}
19
20impl Schema<()> for NullSchema {
21    fn validate(&self, value: &Value) -> ValidateResult<()> {
22        if value.is_null() {
23            Ok(())
24        } else {
25            Err(ValidationError::invalid_type(
26                ValidationType::Null,
27                ValidationType::from(value),
28            )
29            .into())
30        }
31    }
32}
33
34pub fn null() -> NullSchema {
35    NullSchema::new()
36}
37
38#[cfg(test)]
39mod tests {
40    use super::*;
41    use serde_json::json;
42
43    #[test]
44    fn test_null_validation() {
45        let schema = null();
46
47        assert!(schema.validate(&json!(null)).is_ok());
48        assert!(schema.validate(&json!(true)).is_err());
49        assert!(schema.validate(&json!(false)).is_err());
50        assert!(schema.validate(&json!("null")).is_err());
51        assert!(schema.validate(&json!(0)).is_err());
52    }
53
54    #[test]
55    fn test_null_returns_unit() {
56        let schema = null();
57        let result = schema.validate(&json!(null));
58        assert!(result.is_ok());
59        assert_eq!(result.unwrap(), ());
60    }
61
62    #[test]
63    fn test_rejects_empty_string() {
64        let schema = null();
65        assert!(schema.validate(&json!("")).is_err());
66    }
67
68    #[test]
69    fn test_rejects_array() {
70        let schema = null();
71        assert!(schema.validate(&json!([])).is_err());
72    }
73
74    #[test]
75    fn test_rejects_object() {
76        let schema = null();
77        assert!(schema.validate(&json!({})).is_err());
78    }
79}
zod_rs/schema/null.rs

zod_rs/schema/
null.rs
