specters 2.1.2

HTTP client with full TLS, HTTP/2, and HTTP/3 fingerprint control
Documentation 
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//! RFC 9114 HTTP/3 Error Handling Tests
//!
//! https://www.rfc-editor.org/rfc/rfc9114

use specter::transport::h3::H3Client;

#[tokio::test]
async fn test_h3_unsupported_scheme_rfc9114() {
    let client = H3Client::new();
    // HTTP/3 only supports HTTPS URI scheme (RFC 9114 Section 3.1)
    // "h3" token in Alt-Svc implies UDP/443 typically, but URI must be https generally for semantics.
    // Our client explicitly checks parsing.

    let result = client
        .send_request(
            "http://example.com", // Error: scheme must be https
            "GET",
            vec![],
            None,
        )
        .await;

    assert!(result.is_err(), "Expected error for http scheme, got Ok");
    let err = result.err().unwrap().to_string();
    println!("Got error: {}", err);
    assert!(
        err.contains("Unsupported scheme")
            || err.contains("only https")
            || err.contains("requires https")
    );
}

#[tokio::test]
async fn test_h3_dns_resolution_failure() {
    let client = H3Client::new();
    // Use the reserved .invalid TLD (RFC 2606) which guarantees DNS failure
    let result = client
        .send_request("https://domain.invalid", "GET", vec![], None)
        .await;

    assert!(result.is_err(), "Expected error for invalid domain, got Ok");
    let err = result.err().unwrap().to_string();
    println!("Got error: {}", err);
    assert!(
        err.to_lowercase().contains("failed to resolve")
            || err.to_lowercase().contains("no address found")
            || err.to_lowercase().contains("dns")
            || err.to_lowercase().contains("service not known"),
        "Unexpected error message: {}",
        err
    );
}