stemedb/crates/stemedb-api/tests/security_hardening.rs

//! Integration tests for P5.1 Security Hardening features.
//!
//! This test suite validates all 5 security hardening features:
//! 1. TLS/HTTPS (certificate validation)
//! 2. Body Limit Middleware (1MB write, 64KB read)
//! 3. Timeout Middleware (30s HTTP, 5s store)
//! 4. Secret Sanitization (no raw keys in logs)
//! 5. Rate Limiting (1 req/sec per IP for /v1/health)

// NOTE: These tests require additional setup and are marked as #[ignore] for now.
// Run with: cargo test --test security_hardening -- --ignored

#[cfg(test)]
mod tls_tests {

    #[test]
    #[ignore = "TLS tests require self-signed certificate generation"]
    fn test_tls_connection() {
        // TODO: Start server with self-signed cert
        // Make HTTPS request with reqwest
        // Verify successful connection
        todo!("Implement TLS connection test")
    }

    #[test]
    #[ignore = "TLS tests require self-signed certificate generation"]
    fn test_tls_certificate_validation() {
        // TODO: Start server with invalid cert
        // Request should fail with TLS error
        todo!("Implement certificate validation test")
    }

    #[test]
    #[ignore = "TLS tests require certificate setup"]
    fn test_plaintext_mode_when_no_tls_config() {
        // TODO: Start server without TLS env vars
        // Verify server starts in plaintext mode
        // Verify HTTP (not HTTPS) works
        todo!("Implement plaintext fallback test")
    }
}

#[cfg(test)]
mod body_limit_tests {

    #[test]
    #[ignore = "Body limit tests require test server"]
    fn test_write_endpoint_rejects_oversized_payload() {
        // TODO: POST to /v1/assert with 1MB + 1 byte
        // Should get 413 Payload Too Large
        todo!("Implement write body limit test")
    }

    #[test]
    #[ignore = "Body limit tests require test server"]
    fn test_read_endpoint_rejects_oversized_payload() {
        // TODO: GET to /v1/query with 64KB + 1 byte
        // Should get 413 Payload Too Large
        todo!("Implement read body limit test")
    }

    #[test]
    #[ignore = "Body limit tests require test server"]
    fn test_health_endpoint_no_limit() {
        // TODO: GET to /v1/health
        // Should succeed regardless of size
        todo!("Implement health endpoint no-limit test")
    }

    #[test]
    #[ignore = "Body limit tests require test server"]
    fn test_write_endpoint_accepts_max_size() {
        // TODO: POST to /v1/assert with exactly 1MB
        // Should succeed
        todo!("Implement write max size test")
    }
}

#[cfg(test)]
mod timeout_tests {

    #[test]
    #[ignore = "Timeout tests require mock slow handlers"]
    fn test_http_timeout() {
        // TODO: Mock slow handler (>30s)
        // Should timeout with 408
        todo!("Implement HTTP timeout test")
    }

    #[test]
    #[ignore = "Timeout tests require mock slow store"]
    fn test_store_timeout() {
        // TODO: Mock slow store operation (>5s)
        // Should timeout with 500
        todo!("Implement store timeout test")
    }

    #[test]
    #[ignore = "Timeout tests require metrics verification"]
    fn test_timeout_metrics_increment() {
        // TODO: Trigger timeout
        // Verify stemedb_operation_timeouts_total increments
        todo!("Implement timeout metrics test")
    }
}

#[cfg(test)]
mod secret_sanitization_tests {

    #[test]
    #[ignore = "Secret sanitization tests require log capture"]
    fn test_no_raw_keys_in_logs() {
        // TODO: Capture logs during API key operations
        // Verify no raw keys appear (no strings matching [A-Za-z0-9]{12,})
        // Should only see hashes (16-char hex strings)
        todo!("Implement log sanitization test")
    }

    #[test]
    #[ignore = "Secret sanitization tests require API key bootstrap"]
    fn test_bootstrap_logs_hash_not_prefix() {
        // TODO: Bootstrap root API key
        // Capture logs
        // Verify log contains key_hash, not key_prefix
        todo!("Implement bootstrap sanitization test")
    }

    #[test]
    #[ignore = "Secret sanitization tests require API key creation"]
    fn test_create_api_key_logs_hash_not_prefix() {
        // TODO: Create API key via POST /v1/admin/api-keys
        // Capture logs
        // Verify log contains key_hash, not key_prefix
        todo!("Implement create API key sanitization test")
    }

    #[test]
    #[ignore = "Secret sanitization tests require API key rotation"]
    fn test_rotate_api_key_logs_hash_not_prefix() {
        // TODO: Rotate API key via POST /v1/admin/api-keys/:hash/rotate
        // Capture logs
        // Verify log contains key_hash, not key_prefix
        todo!("Implement rotate API key sanitization test")
    }
}

#[cfg(test)]
mod rate_limit_tests {

    #[test]
    #[ignore = "Rate limit tests require test server"]
    fn test_health_endpoint_rate_limit() {
        // TODO: Send 10 requests to /v1/health in <1s
        // 9 should get 429 Too Many Requests
        todo!("Implement health endpoint rate limit test")
    }

    #[test]
    #[ignore = "Rate limit tests require test server"]
    fn test_rate_limit_per_ip() {
        // TODO: Send from different IPs
        // No interference between IPs
        todo!("Implement per-IP rate limit test")
    }

    #[test]
    #[ignore = "Rate limit tests require test server"]
    fn test_rate_limit_allows_one_per_second() {
        // TODO: Send 1 req/sec to /v1/health
        // All should succeed
        todo!("Implement 1 req/sec success test")
    }

    #[test]
    #[ignore = "Rate limit tests require metrics verification"]
    fn test_rate_limit_metrics_increment() {
        // TODO: Trigger rate limit rejection
        // Verify stemedb_rate_limit_rejections_total increments
        todo!("Implement rate limit metrics test")
    }

    #[test]
    #[ignore = "Rate limit tests require test server"]
    fn test_rate_limit_retry_after_header() {
        // TODO: Trigger rate limit
        // Verify 429 response has retry_after_secs field
        todo!("Implement retry-after header test")
    }
}

#[cfg(test)]
mod integration_tests {

    #[test]
    #[ignore = "Integration tests require full server setup"]
    fn test_all_security_features_enabled() {
        // TODO: Start server with:
        // - TLS enabled
        // - Body limits active
        // - Timeouts configured
        // - Rate limiting active
        // Verify all features work together
        todo!("Implement full integration test")
    }

    #[test]
    #[ignore = "Integration tests require configuration testing"]
    fn test_security_features_configurable_via_env() {
        // TODO: Test that all env vars work:
        // - STEMEDB_TLS_CERT_PATH / STEMEDB_TLS_KEY_PATH
        // - STEMEDB_WRITE_BODY_LIMIT / STEMEDB_READ_BODY_LIMIT (when implemented)
        // - STEMEDB_HTTP_TIMEOUT_SECS (when implemented)
        // - STEMEDB_HEALTH_RATE_LIMIT (when implemented)
        todo!("Implement configuration test")
    }
}

// Helper functions for test setup
#[cfg(test)]
mod test_helpers {

    /// Generate self-signed certificate for testing.
    #[allow(dead_code)]
    fn generate_self_signed_cert() -> (Vec<u8>, Vec<u8>) {
        // TODO: Implement self-signed cert generation
        // Return (cert_pem, key_pem)
        todo!("Implement self-signed cert generation")
    }

    /// Start test server with given configuration.
    #[allow(dead_code)]
    async fn start_test_server(/* config */) {
        // TODO: Implement test server startup
        todo!("Implement test server startup")
    }

    /// Capture log output during test.
    #[allow(dead_code)]
    fn capture_logs<F>(_f: F) -> String
    where
        F: FnOnce(),
    {
        // TODO: Implement log capture using tracing-subscriber test subscriber
        todo!("Implement log capture")
    }
}