git-comma 1.0.3

AI-powered git commit message generator using OpenRouter API
Documentation 
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use tempfile::TempDir;

#[test]
fn test_config_load_preserves_api_key_field() {
    let tmp = TempDir::new().unwrap();
    let path = tmp.path().join("comma.json");

    let cfg = git_comma::config::Config {
        api_key: "sk-or-v1-test".to_string(),
        model_id: "anthropic/claude-3-haiku".to_string(),
    };
    cfg.save(&path).unwrap();

    let loaded = git_comma::config::Config::load_from_path(&path).unwrap();
    assert_eq!(loaded.api_key, "sk-or-v1-test");
    assert_eq!(loaded.model_id, "anthropic/claude-3-haiku");
}

#[test]
fn test_load_config_malformed_json() {
    let tmp = TempDir::new().unwrap();
    let path = tmp.path().join("comma.json");
    std::fs::write(&path, "{invalid json}").unwrap();

    let result = git_comma::config::Config::load_from_path(&path);
    assert!(matches!(result, Err(git_comma::config::ConfigError::MalformedJson)));
}

#[test]
fn test_load_config_missing_file() {
    let tmp = TempDir::new().unwrap();
    let path = tmp.path().join("nonexistent.json");

    let result = git_comma::config::Config::load_from_path(&path);
    assert!(matches!(result, Err(git_comma::config::ConfigError::IoError(_))));
}

#[test]
fn test_load_config_success() {
    let tmp = TempDir::new().unwrap();
    let config_path = tmp.path().join("comma.json");
    let content = r#"{"api_key": "sk-or-v1-test", "model_id": "test/model"}"#;
    std::fs::write(&config_path, content).unwrap();

    let result = git_comma::config::Config::load_from_path(&config_path);
    assert!(result.is_ok());
    let cfg = result.unwrap();
    assert_eq!(cfg.api_key, "sk-or-v1-test");
    assert_eq!(cfg.model_id, "test/model");
}

#[test]
fn test_save_config_atomic() {
    let tmp = TempDir::new().unwrap();
    let config_path = tmp.path().join("comma.json");

    let cfg = git_comma::config::Config {
        api_key: "sk-or-v1-test".into(),
        model_id: "test/model".into(),
    };

    cfg.save(&config_path).unwrap();

    let loaded = std::fs::read_to_string(&config_path).unwrap();
    assert!(loaded.contains("sk-or-v1-test"));
    #[cfg(unix)]
    {
        use std::os::unix::fs::PermissionsExt;
        let meta = std::fs::metadata(&config_path).unwrap();
        let perm = meta.permissions().mode();
        assert_eq!(perm & 0o777, 0o600);
    }
}