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ProRT-IP WarScan: Testing Strategy

Version: 3.0 Last Updated: 2025-01-25 Current Status: v1.0.0 Production Release - 2,557 tests, 51.40% coverage

Table of Contents

  1. Overview
  2. Testing Philosophy
  3. Test Levels
  4. Test Infrastructure
  5. Test Coverage
  6. Continuous Integration
  7. Testing Checklist

Overview

Comprehensive testing is critical for ProRT-IP WarScan due to:

  • Security implications: Bugs could enable network attacks or scanner exploitation
  • Cross-platform complexity: Must work correctly on Linux, Windows, macOS
  • Performance requirements: Must maintain 1M+ pps without degradation
  • Protocol correctness: Malformed packets lead to inaccurate results

Testing Goals

  1. Correctness: All scanning modes produce accurate, repeatable results
  2. Safety: No memory leaks, data races, or undefined behavior
  3. Performance: Maintain throughput and latency targets under load
  4. Reliability: Graceful handling of network errors and edge cases
  5. Security: Resist malformed packets and DoS attacks

Test Coverage Targets

Component Target Coverage Current Coverage (v1.0.0)
Core Engine >90% Achieved
Network Protocol >85% Achieved
Scanning Modules >80% Achieved
Detection Systems >75% Achieved
CLI/UI >60% Achieved
Overall >50% 51.40% ✅

Current Metrics (v1.0.0):

  • Total Tests: 2,557 (100% passing)
  • Line Coverage: 51.40%
  • Integration Tests: 175+ tests
  • Fuzz Testing: 230M+ executions, 0 crashes (5 targets)
  • Test Growth: +2,342 tests from Phase 1 (+1,089% growth)
  • Coverage Tool: cargo-tarpaulin with ptrace engine
  • Benchmarks: Criterion.rs + hyperfine with comprehensive baselines

Testing Philosophy

1. Test-Driven Development (TDD) for Core Features

For critical components (packet crafting, state machines, detection engines), write tests before implementation:

// Step 1: Write failing test
#[test]
fn test_tcp_syn_packet_crafting() {
    let packet = TcpPacketBuilder::new()
        .source(Ipv4Addr::new(10, 0, 0, 1), 12345)
        .destination(Ipv4Addr::new(10, 0, 0, 2), 80)
        .flags(TcpFlags::SYN)
        .build()
        .expect("packet building failed");

    assert_eq!(packet.get_flags(), TcpFlags::SYN);
    assert!(verify_tcp_checksum(&packet));
}

// Step 2: Implement feature to make test pass
// Step 3: Refactor while keeping test green

2. Property-Based Testing for Protocol Handling

Use proptest or quickcheck to generate random inputs and verify invariants:

use proptest::prelude::*;

proptest! {
    #[test]
    fn tcp_checksum_always_valid(
        src_ip: u32,
        dst_ip: u32,
        src_port: u16,
        dst_port: u16,
        seq: u32,
    ) {
        let packet = build_tcp_packet(src_ip, dst_ip, src_port, dst_port, seq);
        prop_assert!(verify_tcp_checksum(&packet));
    }
}

3. Regression Testing

Every bug fix must include a test that would have caught the bug:

// Regression test for issue #42: SYN+ACK responses with window=0 incorrectly marked closed
#[test]
fn test_issue_42_zero_window_syn_ack() {
    let response = create_syn_ack_response(window_size: 0);
    let state = determine_port_state(&response);
    assert_eq!(state, PortState::Open); // Was incorrectly Closed before fix
}

4. Mutation Testing

Periodically run mutation testing to verify test quality:

# Install cargo-mutants
cargo install cargo-mutants

# Run mutation tests
cargo mutants

# Should achieve >90% mutation score on core modules

Test Levels

1. Unit Tests

Scope: Individual functions and structs in isolation

Location: Inline with source code in #[cfg(test)] modules

Examples:

// src/net/tcp.rs

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_tcp_flags_parsing() {
        let flags = TcpFlags::from_bits(0x02).unwrap();
        assert_eq!(flags, TcpFlags::SYN);
    }

    #[test]
    fn test_sequence_number_wrapping() {
        let seq = SequenceNumber::new(0xFFFF_FFFE);
        let next = seq.wrapping_add(5);
        assert_eq!(next.value(), 3); // Wraps around at u32::MAX
    }

    #[test]
    fn test_tcp_option_serialization() {
        let opt = TcpOption::Mss(1460);
        let bytes = opt.to_bytes();
        assert_eq!(bytes, vec![2, 4, 0x05, 0xB4]);
    }
}

Run Commands:

# All unit tests
cargo test --lib

# Specific module
cargo test tcp::tests

# With output
cargo test -- --nocapture

2. Integration Tests

Scope: Multiple components working together

Location: tests/ directory (separate from source)

Examples:

// tests/integration_syn_scan.rs

use prtip::scanner::{Scanner, ScanConfig, ScanType};
use prtip::target::Target;

#[tokio::test]
async fn test_syn_scan_local_host() {
    // Setup: Start local test server on port 8080
    let server = spawn_test_server(8080).await;

    // Execute scan
    let config = ScanConfig {
        scan_type: ScanType::Syn,
        targets: vec![Target::single("127.0.0.1", 8080)],
        timeout: Duration::from_secs(5),
        ..Default::default()
    };

    let scanner = Scanner::new(config).unwrap();
    let results = scanner.execute().await.unwrap();

    // Verify
    assert_eq!(results.len(), 1);
    assert_eq!(results[0].state, PortState::Open);
    assert_eq!(results[0].port, 8080);

    // Cleanup
    server.shutdown().await;
}

#[tokio::test]
async fn test_syn_scan_filtered_port() {
    // Port 9999 should be filtered (no response, no RST)
    let config = ScanConfig {
        scan_type: ScanType::Syn,
        targets: vec![Target::single("127.0.0.1", 9999)],
        timeout: Duration::from_millis(100),
        max_retries: 1,
        ..Default::default()
    };

    let scanner = Scanner::new(config).unwrap();
    let results = scanner.execute().await.unwrap();

    assert_eq!(results[0].state, PortState::Filtered);
}

Run Commands:

# All integration tests
cargo test --test '*'

# Specific test file
cargo test --test integration_syn_scan

# Single test
cargo test --test integration_syn_scan test_syn_scan_local_host

3. System Tests

Scope: End-to-end scenarios mimicking real-world usage

Location: tests/system/ with helper scripts

Examples:

#!/bin/bash
# tests/system/test_full_network_scan.sh

set -e

# Setup test network (requires Docker)
docker-compose -f tests/fixtures/docker-compose.yml up -d

# Wait for services to start
sleep 5

# Run full scan
cargo run --release -- \
    -sS -sV -O \
    -p- \
    --output json \
    --output-file /tmp/scan_results.json \
    172.20.0.0/24

# Verify expected services found
python3 tests/system/verify_results.py /tmp/scan_results.json

# Cleanup
docker-compose -f tests/fixtures/docker-compose.yml down

echo "✓ System test passed"

Run Commands:

bash tests/system/test_full_network_scan.sh

4. Performance Tests

Scope: Throughput, latency, resource usage benchmarks

Location: benches/ directory using Criterion.rs

Examples:

// benches/packet_crafting.rs

use criterion::{black_box, criterion_group, criterion_main, Criterion, BenchmarkId};
use prtip::net::TcpPacketBuilder;

fn bench_tcp_packet_building(c: &mut Criterion) {
    c.bench_function("tcp_syn_packet", |b| {
        b.iter(|| {
            TcpPacketBuilder::new()
                .source(black_box(Ipv4Addr::new(10, 0, 0, 1)), black_box(12345))
                .destination(black_box(Ipv4Addr::new(10, 0, 0, 2)), black_box(80))
                .flags(TcpFlags::SYN)
                .build()
                .unwrap()
        });
    });
}

fn bench_throughput(c: &mut Criterion) {
    let mut group = c.benchmark_group("throughput");

    for rate in [10_000, 100_000, 1_000_000] {
        group.bench_with_input(BenchmarkId::new("packets_per_sec", rate), &rate, |b, &rate| {
            b.iter(|| {
                // Simulate sending 'rate' packets
                simulate_packet_transmission(black_box(rate))
            });
        });
    }

    group.finish();
}

criterion_group!(benches, bench_tcp_packet_building, bench_throughput);
criterion_main!(benches);

Run Commands:

# Run all benchmarks
cargo bench

# Specific benchmark
cargo bench tcp_packet

# With profiling (Linux)
cargo bench --bench packet_crafting -- --profile-time=5

5. Fuzz Testing

Scope: Malformed input handling and crash resistance

Location: fuzz/ directory using cargo-fuzz

Setup:

cargo install cargo-fuzz
cargo fuzz init

Examples:

// fuzz/fuzz_targets/tcp_parser.rs

#![no_main]
use libfuzzer_sys::fuzz_target;
use prtip::net::parse_tcp_packet;

fuzz_target!(|data: &[u8]| {
    // Should never panic, even with arbitrary input
    let _ = parse_tcp_packet(data);
});

Run Commands:

# Fuzz TCP parser (runs indefinitely until crash)
cargo fuzz run tcp_parser

# Run for specific duration
cargo fuzz run tcp_parser -- -max_total_time=300  # 5 minutes

# Run with corpus
cargo fuzz run tcp_parser fuzz/corpus/tcp_parser/

Test Infrastructure

Test Network Setup

Docker Compose Test Environment

# tests/fixtures/docker-compose.yml

version: '3.8'

services:
  web-server:
    image: nginx:alpine
    ports:
      - "80:80"
      - "443:443"
    networks:
      testnet:
        ipv4_address: 172.20.0.10

  ssh-server:
    image: linuxserver/openssh-server
    environment:
      - PUID=1000
      - PGID=1000
      - PASSWORD_ACCESS=true
      - USER_PASSWORD=testpass
    ports:
      - "2222:2222"
    networks:
      testnet:
        ipv4_address: 172.20.0.11

  ftp-server:
    image: delfer/alpine-ftp-server
    environment:
      - USERS=testuser|testpass
    ports:
      - "21:21"
    networks:
      testnet:
        ipv4_address: 172.20.0.12

  database:
    image: postgres:15-alpine
    environment:
      - POSTGRES_PASSWORD=testpass
    ports:
      - "5432:5432"
    networks:
      testnet:
        ipv4_address: 172.20.0.13

networks:
  testnet:
    driver: bridge
    ipam:
      config:
        - subnet: 172.20.0.0/24

Usage:

# Start test environment
docker-compose -f tests/fixtures/docker-compose.yml up -d

# Run tests
cargo test --test integration_service_detection

# Cleanup
docker-compose -f tests/fixtures/docker-compose.yml down

Mock Services

// tests/helpers/mock_server.rs

use tokio::net::TcpListener;

/// Spawn a TCP server that responds with custom behavior
pub async fn spawn_mock_tcp_server(
    port: u16,
    response_handler: impl Fn(&[u8]) -> Vec<u8> + Send + 'static,
) -> MockServer {
    let listener = TcpListener::bind(format!("127.0.0.1:{}", port))
        .await
        .unwrap();

    let handle = tokio::spawn(async move {
        while let Ok((mut socket, _)) = listener.accept().await {
            let mut buf = vec![0u8; 1024];
            if let Ok(n) = socket.read(&mut buf).await {
                let response = response_handler(&buf[..n]);
                socket.write_all(&response).await.ok();
            }
        }
    });

    MockServer { handle, port }
}

pub struct MockServer {
    handle: JoinHandle<()>,
    port: u16,
}

impl MockServer {
    pub async fn shutdown(self) {
        self.handle.abort();
    }
}

Test Data Fixtures

// tests/fixtures/mod.rs

pub mod pcap_samples {
    /// Load PCAP file for replay testing
    pub fn load_syn_scan_capture() -> Vec<u8> {
        include_bytes!("pcaps/syn_scan.pcap").to_vec()
    }

    pub fn load_os_fingerprint_capture() -> Vec<u8> {
        include_bytes!("pcaps/os_fingerprint.pcap").to_vec()
    }
}

pub mod fingerprints {
    /// Sample OS fingerprint database for testing
    pub fn test_fingerprints() -> Vec<OsFingerprint> {
        vec![
            OsFingerprint {
                name: "Linux 5.x",
                signature: "...",
                // ...
            },
            OsFingerprint {
                name: "Windows 10",
                signature: "...",
                // ...
            },
        ]
    }
}

Test Coverage

Measuring Coverage

# Install tarpaulin (Linux only)
cargo install cargo-tarpaulin

# Generate HTML coverage report
cargo tarpaulin --out Html --output-dir coverage

# View report
firefox coverage/index.html

# CI mode (exit with error if below threshold)
cargo tarpaulin --fail-under 80

Coverage Targets by Module

// Core modules (>90% coverage)
// - packet crafting
// - checksum calculation
// - state machines

// Medium-priority modules (>80% coverage)
// - scanning algorithms
// - rate limiting
// - result aggregation

// Lower-priority modules (>60% coverage)
// - CLI parsing
// - output formatters
// - TUI components

Continuous Integration

GitHub Actions Workflow

# .github/workflows/ci.yml

name: CI

on: [push, pull_request]

jobs:
  test:
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
        rust: [stable, beta]

    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v3

      - name: Install Rust
        uses: actions-rust-lang/setup-rust-toolchain@v1
        with:
          toolchain: ${{ matrix.rust }}

      - name: Install dependencies (Linux)
        if: runner.os == 'Linux'
        run: |
          sudo apt-get update
          sudo apt-get install -y libpcap-dev libssl-dev

      - name: Install dependencies (macOS)
        if: runner.os == 'macOS'
        run: brew install libpcap openssl@3

      - name: Install dependencies (Windows)
        if: runner.os == 'Windows'
        run: |
          choco install npcap
          # Download Npcap SDK

      - name: Check formatting
        run: cargo fmt --check

      - name: Lint
        run: cargo clippy -- -D warnings

      - name: Build
        run: cargo build --verbose

      - name: Run tests
        run: cargo test --verbose

      - name: Run integration tests
        run: cargo test --test '*' --verbose

  coverage:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions-rust-lang/setup-rust-toolchain@v1

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y libpcap-dev libssl-dev
          cargo install cargo-tarpaulin

      - name: Generate coverage
        run: cargo tarpaulin --out Xml

      - name: Upload to codecov
        uses: codecov/codecov-action@v3
        with:
          files: ./cobertura.xml

  security:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Security audit
        run: |
          cargo install cargo-audit
          cargo audit

Testing Checklist

Before Each Commit

  • Code passes cargo fmt --check
  • Code passes cargo clippy -- -D warnings
  • All unit tests pass (cargo test --lib)
  • New code has accompanying tests
  • Coverage hasn't decreased

Before Each PR

  • All tests pass on all platforms (CI green)
  • Integration tests pass (cargo test --test '*')
  • Benchmarks show no regression (cargo bench)
  • Documentation updated for new features
  • Changelog updated

Before Each Release

  • Full system tests pass
  • Security audit clean (cargo audit)
  • Fuzz testing run for 24+ hours without crashes
  • Performance benchmarks meet targets
  • Cross-platform testing complete
  • Memory leak testing clean (valgrind)
  • Release notes written

Test Anti-Patterns to Avoid

❌ Don't: Flaky tests

// BAD: Race condition in test
#[tokio::test]
async fn flaky_test() {
    spawn_server().await;
    // No wait for server to be ready!
    let client = connect().await.unwrap(); // May fail randomly
}

// GOOD: Deterministic test
#[tokio::test]
async fn reliable_test() {
    let server = spawn_server().await;
    server.wait_until_ready().await;
    let client = connect().await.unwrap();
}

❌ Don't: Tests that depend on external state

// BAD: Depends on external file
#[test]
fn test_config_loading() {
    let config = load_config("/etc/prtip/config.toml"); // Fails in CI
}

// GOOD: Use fixtures
#[test]
fn test_config_loading() {
    let config = load_config("tests/fixtures/test_config.toml");
}

❌ Don't: Tests without assertions

// BAD: No verification
#[test]
fn test_scan() {
    let scanner = Scanner::new();
    scanner.scan("192.168.1.1").unwrap();
    // Test passes even if scan did nothing!
}

// GOOD: Verify behavior
#[test]
fn test_scan() {
    let scanner = Scanner::new();
    let results = scanner.scan("192.168.1.1").unwrap();
    assert!(!results.is_empty());
    assert_eq!(results[0].ip, "192.168.1.1");
}

Sprint 4.22 Phase 7: Comprehensive Testing

Overview

Added 122 tests validating error handling infrastructure across 6 categories:

Category Tests Coverage Key Features
Error Injection 22 Framework 11 failure modes, deterministic simulation
Circuit Breaker 18 90%+ State transitions, per-target isolation
Retry Logic 14 85%+ Exponential backoff, transient detection
Resource Monitor 15 80%+ Memory/CPU thresholds, adaptive degradation
Error Messages 20 User-facing Clarity, recovery suggestions, context
Integration 15 End-to-end CLI scenarios, exit codes, input validation
Edge Cases 18 Boundaries Port/CIDR/timeout/parallelism limits

Test Infrastructure

Error Injection Framework (crates/prtip-scanner/tests/common/error_injection.rs):

  • 11 failure modes (ConnectionRefused, Timeout, NetworkUnreachable, etc.)
  • Deterministic simulation with attempt tracking
  • Retriability classification (transient vs permanent)
  • Helper methods for scanner error conversion

Usage Example:

use common::error_injection::{ErrorInjector, FailureMode};

let injector = ErrorInjector::new(
    target_addr,
    FailureMode::Timeout(Duration::from_millis(100))
);

// Simulate failure
let result = injector.inject();
assert!(matches!(result, Err(ScannerError::Timeout(_))));

Running Error Handling Tests

# All error handling tests
cargo test --workspace | grep -E "(error|circuit|retry|resource)"

# Specific categories
cargo test -p prtip-scanner test_error_injection
cargo test -p prtip-core test_circuit_breaker
cargo test -p prtip-core test_retry
cargo test -p prtip-core test_resource_monitor
cargo test -p prtip-cli test_error_messages
cargo test -p prtip-cli test_error_integration
cargo test -p prtip-cli test_edge_cases

Performance Impact

Error handling infrastructure overhead: <5% (acceptable)

  • Retry logic: ~1-2% overhead (exponential backoff calculation)
  • Circuit breaker: ~1% overhead (HashMap lookup + atomic operations)
  • Resource monitor: ~1-2% overhead (periodic system checks)
  • Total: 3-5% combined overhead

Test Statistics

  • Total tests: 1,338
  • Error handling tests: 122
  • Percentage: 9.1% of test suite

Error Handling Test Files

crates/
├── prtip-scanner/tests/
│   ├── common/
│   │   ├── mod.rs                           # Module declarations
│   │   └── error_injection.rs               # 270 lines, 11 failure modes
│   └── test_error_injection.rs              # 120 lines, 11 integration tests
├── prtip-core/tests/
│   ├── test_circuit_breaker.rs              # 520 lines, 18 tests
│   ├── test_retry.rs                        # 440 lines, 14 tests
│   └── test_resource_monitor.rs             # 290 lines, 15 tests
└── prtip-cli/tests/
    ├── test_error_messages.rs               # 520 lines, 20 tests
    ├── test_error_integration.rs            # 385 lines, 15 tests
    └── test_edge_cases.rs                   # 370 lines, 18 tests

IPv6 Testing

Sprint 5.1 added comprehensive IPv6 test coverage (40 new tests across Phases 4.1-4.2).

Test Files

IPv6 CLI Flags: crates/prtip-cli/tests/test_ipv6_cli_flags.rs (452 lines, 29 tests)

Tests all IPv6 protocol preference and enforcement flags:

  • -6 / --ipv6 flag parsing and behavior
  • -4 / --ipv4 flag parsing and behavior
  • --prefer-ipv6 / --prefer-ipv4 with fallback
  • --ipv6-only / --ipv4-only strict modes
  • Flag conflict detection (e.g., -6 + -4 together)
  • Hostname resolution with protocol preference
  • Error handling for protocol mismatches

Cross-Scanner IPv6: crates/prtip-scanner/tests/test_cross_scanner_ipv6.rs (309 lines, 11 tests)

Tests all 6 scanner types against IPv6 loopback (::1):

  • TCP Connect Scanner (IPv6 port states)
  • SYN Scanner (IPv6 SYN/ACK handling)
  • UDP Scanner (IPv6 + ICMPv6 Port Unreachable)
  • Stealth Scanners (FIN/NULL/Xmas/ACK on IPv6)
  • Discovery Engine (ICMPv6 Echo + NDP)
  • Decoy Scanner (IPv6 /64 IID generation)

Running IPv6 Tests

# All IPv6 tests
cargo test ipv6

# CLI flag tests
cargo test -p prtip-cli test_ipv6_cli_flags

# Cross-scanner tests
cargo test -p prtip-scanner test_cross_scanner_ipv6

# Specific scanner test
cargo test -p prtip-scanner test_tcp_connect_ipv6_loopback

IPv6 Test Coverage

Component Tests Lines Coverage
IPv6 CLI Flags 29 452 75%+
Cross-Scanner IPv6 11 309 85%+
TCP Connect IPv6 Integrated - 90%+
SYN Scanner IPv6 Integrated - 85%+
UDP Scanner IPv6 Integrated - 80%+
Stealth Scanners IPv6 Integrated - 80%+
Discovery Engine IPv6 7 158 85%+
Decoy Scanner IPv6 7 144 80%+

Integration Test Example

// Cross-scanner IPv6 consistency test
#[tokio::test]
async fn test_all_scanners_support_ipv6_loopback() {
    let loopback_v6 = "::1".parse::<IpAddr>().unwrap();
    let ports = vec![22, 80, 443, 3306, 5432];

    // Test all 6 scanner types
    let scanners = vec![
        ScanType::TcpConnect,
        ScanType::Syn,
        ScanType::Udp,
        ScanType::Fin,
        ScanType::Discovery,
        ScanType::Decoy,
    ];

    for scan_type in scanners {
        let config = ScanConfig {
            scan_type,
            targets: vec![Target::Single(SocketAddr::new(loopback_v6, 0))],
            ports: ports.clone(),
            timeout: Duration::from_secs(5),
            ..Default::default()
        };

        let results = run_scan(config).await.unwrap();

        // Verify scan completed without errors
        assert!(!results.is_empty(), "Scanner {:?} failed on IPv6", scan_type);

        // Verify protocol consistency
        for result in results {
            assert_eq!(result.target.ip(), loopback_v6);
        }
    }
}

Performance Benchmarks

IPv6 loopback performance (6 ports):

  • TCP Connect: ~5ms (parity with IPv4)
  • SYN: ~10ms (slightly slower due to larger packets)
  • UDP: ~50ms (timeout-dependent)
  • Stealth: ~10-15ms each
  • Discovery (ICMPv6+NDP): ~50ms
  • Decoy: ~20ms (5 decoys)

All scanners complete <100ms on loopback, validating zero regressions.

Error Handling Testing

Sprint 4.22 Phase 7 added comprehensive error handling test coverage (122 tests).

Error Injection Framework

Located: crates/prtip-scanner/tests/common/error_injection.rs

Provides deterministic failure simulation for testing error paths:

  • 11 Failure Modes: ConnectionRefused, Timeout, NetworkUnreachable, HostUnreachable, ConnectionReset, ConnectionAborted, WouldBlock, Interrupted, TooManyOpenFiles, MalformedResponse, InvalidEncoding, SuccessAfter, Probabilistic
  • Retriability Classification: Automatic detection of transient vs permanent errors
  • Attempt Tracking: Reset-able counters for retry testing

Example usage:

use common::error_injection::{ErrorInjector, FailureMode};

let target = "127.0.0.1:80".parse().unwrap();
let injector = ErrorInjector::new(target, FailureMode::Timeout(Duration::from_secs(5)));
let result = injector.inject_connection_error();
assert!(result.is_err());

Test Categories

Circuit Breaker (18 tests): State transitions, threshold detection, cooldown timing, per-target isolation

Retry Logic (14 tests): Max attempts, exponential backoff, transient error detection, permanent error handling

Resource Monitor (15 tests): Memory thresholds, FD limits, graceful degradation, alert generation

Error Messages (20 tests): User-facing clarity, recovery suggestions, context completeness, no stack traces

Integration (15 tests): End-to-end CLI scenarios, exit codes, input validation, permission handling

Edge Cases (18 tests): Boundary conditions (port 0/65535/65536), CIDR extremes (/0, /31, /32), resource limits

Coverage Metrics

  • Error modules: 85%+ (crates/*/src/error.rs)
  • Circuit breaker: 90%+ (crates/prtip-core/src/circuit_breaker.rs)
  • Retry logic: 85%+ (crates/prtip-core/src/retry.rs)
  • Resource monitor: 80%+ (crates/prtip-core/src/resource_monitor.rs)
  • Overall: 61.92%+ maintained

Test Results

  • Total tests: 1,216 → 1,338 (+122 = +10%)
  • Success rate: 100% (all passing, zero regressions)
  • Performance: < 5% overhead
  • Zero clippy warnings

Next Steps