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August 20, 2024 19:08
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config.json in rust
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| use serde::Deserialize; | |
| #[derive(Debug, Clone, Deserialize)] | |
| pub struct Config { | |
| #[serde(rename = "serverHost", default = "default_host")] | |
| pub server_host: String, | |
| #[serde(rename = "serverPort", default = "default_port")] | |
| pub server_port: u16, | |
| } | |
| fn default_host() -> String { | |
| "localhost".to_string() | |
| } | |
| fn default_port() -> u16 { | |
| 0 | |
| } | |
| fn load_config() -> eyre::Result<Config> { | |
| let config_path = std::env::var("CONFIG_PATH").unwrap_or_else(|_| "config.json".to_string()); | |
| let config = std::fs::read_to_string(config_path)?; | |
| let config: Config = serde_json::from_str(&config)?; | |
| tracing::info!("Loaded config: {:?}", config); | |
| Ok(config) | |
| } | |
| #[cfg(test)] | |
| mod tests { | |
| use super::*; | |
| #[test] | |
| fn test_config_deserialization() { | |
| let config = r#"{ | |
| "serverHost": "0.1.2.3" | |
| }"#; | |
| let config: Config = serde_json::from_str(config).unwrap(); | |
| assert_eq!(config.server_host, "0.1.2.3"); | |
| assert_eq!(config.server_port, 0); | |
| } | |
| #[test] | |
| fn test_default_host() { | |
| let config = r#"{ | |
| }"#; | |
| let config: Config = serde_json::from_str(config).unwrap(); | |
| assert_eq!(config.server_host, "localhost"); | |
| } | |
| #[test] | |
| fn test_port() { | |
| let config = r#"{ | |
| "serverHost": "0.0.0.0", | |
| "serverPort": 1234 | |
| }"#; | |
| let config: Config = serde_json::from_str(config).unwrap(); | |
| assert_eq!(config.server_port, 1234); | |
| } | |
| } |
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