turbomcp_core/
error_utils.rs

1//! Error handling utility functions for consistent error patterns
2//!
3//! This module provides standardized error conversion and handling patterns
4//! to eliminate inconsistencies across the codebase.
5
6use std::fmt;
7
8/// Standard error conversion pattern for consistent error formatting
9pub trait StandardErrorConversion<T> {
10    /// Convert error to standard string format with context
11    fn to_standard_error(self, context: &str) -> Result<T, String>;
12}
13
14impl<T, E: fmt::Display> StandardErrorConversion<T> for Result<T, E> {
15    fn to_standard_error(self, context: &str) -> Result<T, String> {
16        self.map_err(|e| format!("{context}: {e}"))
17    }
18}
19
20/// Convenience function for consistent JSON parsing errors
21pub fn json_parse_error<T>(
22    result: Result<T, serde_json::Error>,
23    context: &str,
24) -> Result<T, String> {
25    result.map_err(|e| format!("{context}: {e}"))
26}
27
28/// Convenience function for consistent I/O errors  
29pub fn io_error<T>(result: Result<T, std::io::Error>, context: &str) -> Result<T, String> {
30    result.map_err(|e| format!("{context}: {e}"))
31}
32
33/// Convenience function for consistent network errors
34pub fn network_error<T>(
35    result: Result<T, Box<dyn std::error::Error + Send + Sync>>,
36    context: &str,
37) -> Result<T, String> {
38    result.map_err(|e| format!("{context}: {e}"))
39}
40
41#[cfg(test)]
42mod tests {
43    use super::*;
44    use serde_json;
45
46    #[test]
47    fn test_standard_error_conversion() {
48        let result: Result<i32, &str> = Err("original error");
49        let converted = result.to_standard_error("Operation failed");
50        assert_eq!(converted.unwrap_err(), "Operation failed: original error");
51    }
52
53    #[test]
54    fn test_json_parse_error() {
55        let invalid_json = "{ invalid json";
56        let result: Result<serde_json::Value, _> = serde_json::from_str(invalid_json);
57        let converted = json_parse_error(result, "Failed to parse JSON");
58        assert!(converted.unwrap_err().starts_with("Failed to parse JSON:"));
59    }
60
61    #[test]
62    fn test_io_error() {
63        let result: Result<String, std::io::Error> = Err(std::io::Error::new(
64            std::io::ErrorKind::NotFound,
65            "file not found",
66        ));
67        let converted = io_error(result, "Failed to read file");
68        assert_eq!(
69            converted.unwrap_err(),
70            "Failed to read file: file not found"
71        );
72    }
73}
turbomcp_core/error_utils.rs

turbomcp_core/
error_utils.rs
