derusted 0.2.0

// Integration Tests for HTTP Proxy
// Phase 5: End-to-end testing with real HTTP/HTTPS requests


#[cfg(test)]
mod http_integration_tests {
    

    /// Test basic HTTP GET request through proxy
    /// Requires: httpbin.org or local test server
    #[tokio::test]
    #[ignore] // Run with: cargo test --test integration_tests -- --ignored
    async fn test_http_get_success() {
        // This test requires a running proxy instance
        // Start proxy: cargo run --release
        // Run test: cargo test test_http_get_success -- --ignored --nocapture

        // TODO: Implement with reqwest client configured to use proxy
        // let client = reqwest::Client::builder()
        //     .proxy(reqwest::Proxy::all("https://localhost:8443").unwrap())
        //     .build()
        //     .unwrap();
        // let response = client.get("http://httpbin.org/get").send().await.unwrap();
        // assert_eq!(response.status(), 200);
    }

    /// Test HTTP POST with JSON body
    #[tokio::test]
    #[ignore]
    async fn test_http_post_with_body() {
        // TODO: Implement POST request with JSON body
        // Verify body is correctly forwarded
    }

    /// Test HTTPS request with TLS handshake
    #[tokio::test]
    #[ignore]
    async fn test_https_get_success() {
        // TODO: Implement HTTPS request
        // Verify TLS connection works end-to-end
    }

    /// Test request body size limit (413 response)
    #[tokio::test]
    #[ignore]
    async fn test_request_body_too_large() {
        // TODO: Send request exceeding MAX_REQUEST_BODY_SIZE
        // Verify 413 Payload Too Large response
    }

    /// Test response body size limit (502 response)
    #[tokio::test]
    #[ignore]
    async fn test_response_body_too_large() {
        // TODO: Request resource that returns > MAX_RESPONSE_BODY_SIZE
        // Verify 502 Bad Gateway response
    }

    /// Test IP limit enforcement across multiple requests
    #[tokio::test]
    #[ignore]
    async fn test_ip_limit_across_requests() {
        // TODO: Make requests from 6 different IPs with same token
        // Verify 6th IP gets 403 Forbidden
    }

    /// Test SSRF protection (blocked destinations)
    #[tokio::test]
    #[ignore]
    async fn test_ssrf_localhost_blocked() {
        // TODO: Attempt to access http://localhost:22/
        // Verify 403 Forbidden response
    }

    /// Test SSRF protection (RFC1918 private ranges)
    #[tokio::test]
    #[ignore]
    async fn test_ssrf_private_ip_blocked() {
        // TODO: Attempt to access http://192.168.1.1/
        // Verify 403 Forbidden response
    }

    /// Test DNS cache functionality
    #[tokio::test]
    #[ignore]
    async fn test_dns_cache_performance() {
        // TODO: Make multiple requests to same domain
        // Verify subsequent requests are faster (DNS cached)
    }

    /// Test chunked transfer encoding
    #[tokio::test]
    #[ignore]
    async fn test_chunked_response_handling() {
        // TODO: Request resource that returns chunked encoding
        // Verify response is correctly dechunked
    }

    /// Test authentication enforcement
    #[tokio::test]
    #[ignore]
    async fn test_missing_auth_returns_407() {
        // TODO: Send request without Proxy-Authorization header
        // Verify 407 Proxy Authentication Required
    }

    /// Test invalid JWT token
    #[tokio::test]
    #[ignore]
    async fn test_invalid_token_returns_403() {
        // TODO: Send request with invalid/expired JWT
        // Verify 403 Forbidden
    }

    /// Test rate limiting
    #[tokio::test]
    #[ignore]
    async fn test_rate_limit_enforcement() {
        // TODO: Send requests exceeding rate limit
        // Verify 429 Too Many Requests
    }

    /// Test concurrent requests
    #[tokio::test]
    #[ignore]
    async fn test_concurrent_requests() {
        // TODO: Send 100 concurrent requests
        // Verify all succeed with 200 OK
    }

    /// Test large response body streaming
    #[tokio::test]
    #[ignore]
    async fn test_large_response_streaming() {
        // TODO: Request 50MB response
        // Verify streaming works without memory issues
    }
}

#[cfg(test)]
mod load_test_helpers {
    /// Helper to generate JWT token for testing
    pub fn generate_test_token() -> String {
        // TODO: Implement JWT generation for load tests
        "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9...".to_string()
    }

    /// Helper to start test proxy instance
    pub async fn start_test_proxy() -> Result<(), Box<dyn std::error::Error>> {
        // TODO: Start proxy in background for integration tests
        Ok(())
    }

    /// Helper to stop test proxy instance
    pub async fn stop_test_proxy() {
        // TODO: Stop background proxy instance
    }
}

/// Load Test Scenarios (to be run with h2load)
///
/// Scenario 1: Basic throughput test
/// ```bash
/// h2load -n 10000 -c 100 -t 4 \
///   --header="Proxy-Authorization: Bearer $TOKEN" \
///   http://httpbin.org/get
/// ```
///
/// Scenario 2: Concurrent connections test
/// ```bash
/// h2load -n 100000 -c 1000 -t 8 \
///   --header="Proxy-Authorization: Bearer $TOKEN" \
///   http://httpbin.org/get
/// ```
///
/// Scenario 3: Large body test
/// ```bash
/// h2load -n 1000 -c 10 -t 2 \
///   --header="Proxy-Authorization: Bearer $TOKEN" \
///   http://httpbin.org/bytes/1048576
/// ```
mod load_test_documentation {
    // This module contains documentation and helper scripts for load testing
    // Actual load tests should be run manually with h2load or similar tools
}

/// Performance benchmarks to track
///
/// 1. Request latency (p50, p95, p99)
/// 2. Throughput (requests/second)
/// 3. Memory usage under load
/// 4. DNS cache hit rate
/// 5. Connection pool efficiency
/// 6. IP retry performance
#[cfg(test)]
mod performance_benchmarks {
    // TODO: Implement criterion benchmarks for critical paths
}