graphify_core/
error.rs

1use thiserror::Error;
2
3#[derive(Debug, Error)]
4pub enum GraphifyError {
5    #[error("invalid node: {0}")]
6    InvalidNode(String),
7
8    #[error("invalid edge: {0}")]
9    InvalidEdge(String),
10
11    #[error("duplicate node with id `{0}`")]
12    DuplicateNode(String),
13
14    #[error("node not found: `{0}`")]
15    NodeNotFound(String),
16
17    #[error("IO error: {0}")]
18    IoError(#[from] std::io::Error),
19
20    #[error("serialization error: {0}")]
21    SerializationError(#[from] serde_json::Error),
22
23    #[error("graph error: {0}")]
24    GraphError(String),
25}
26
27pub type Result<T> = std::result::Result<T, GraphifyError>;
28
29#[cfg(test)]
30mod tests {
31    use super::*;
32
33    #[test]
34    fn error_display() {
35        let e = GraphifyError::InvalidNode("bad".into());
36        assert_eq!(e.to_string(), "invalid node: bad");
37    }
38
39    #[test]
40    fn error_from_serde() {
41        let raw = "not json";
42        let err: std::result::Result<serde_json::Value, _> = serde_json::from_str(raw);
43        let g: GraphifyError = err.unwrap_err().into();
44        assert!(matches!(g, GraphifyError::SerializationError(_)));
45    }
46
47    #[test]
48    fn error_from_io() {
49        let io = std::io::Error::new(std::io::ErrorKind::NotFound, "missing");
50        let g: GraphifyError = io.into();
51        assert!(matches!(g, GraphifyError::IoError(_)));
52    }
53
54    #[test]
55    fn duplicate_node_display() {
56        let e = GraphifyError::DuplicateNode("abc".into());
57        assert_eq!(e.to_string(), "duplicate node with id `abc`");
58    }
59}
graphify_core/error.rs

graphify_core/
error.rs
