[Test Coverage] Improve host-iptables.ts branch coverage

[github-actions]

Summary

Adds 8 new tests covering previously uncovered branches in src/host-iptables.ts, improving branch coverage from 55.55% (10/18) toward higher coverage.

Changes

• src/host-iptables.test.ts — 232 lines added, 8 new test cases

Security-Critical Paths Now Covered

Branch	Description
cliProxyConfig path	CLI proxy DIFC host access: allows cli-proxy IP to reach host gateway on DIFC port (both AWF and Docker bridge gateways)
cliProxyConfig + null Docker gateway	Only AWF gateway rule added when Docker bridge is unavailable
IPv6 DNS + ip6tables available	Creates FW_WRAPPER_V6 chain and adds IPv6 DNS allowlist rules
Existing FW_WRAPPER_V6 cleanup	Flushes and deletes existing IPv6 chain before recreation
DOCKER-USER chain creation failure	Throws specific error when chain creation fails after chain not found
getDockerBridgeGateway invalid IPv4	Skips gateway with non-IPv4 value, only uses AWF network gateway
cleanupHostIptables with null bridge	Skips DOCKER-USER rule removal when bridge name is not found

Before / After

Metric	Before	After (estimated)
Branch coverage (host-iptables.ts)	55.55% (10/18)	~83%+ (15/18)
Overall branch coverage	31.78%	~33%+

Test Design

All tests follow existing patterns:

• Mock execa with jest.mock()
• Reset IPv6 state via __testing._resetIpv6State() in beforeEach
• Test one behavior per test case
• No Docker, no real iptables calls — fully deterministic

No Bugs Found

All uncovered branches appear to work correctly. The getDockerBridgeGateway IPv4 validation (preventing injection of arbitrary strings into iptables rules) is a good security safeguard that is now tested.

Generated by Weekly Test Coverage Improver · ● 4.1M · ◷

[github-actions]

✅ Coverage Check Passed

Overall Coverage

Metric	Base	PR	Delta
Lines	87.37%	88.04%	📈 +0.67%
Statements	87.34%	87.98%	📈 +0.64%
Functions	82.70%	82.70%	➡️ +0.00%
Branches	79.43%	79.94%	📈 +0.51%

📁 Per-file Coverage Changes (2 files)

File	Lines (Before → After)	Statements (Before → After)
src/container-lifecycle.ts	87.1% → 88.2% (+1.14%)	87.5% → 88.6% (+1.11%)
src/host-iptables.ts	88.7% → 97.7% (+8.95%)	88.5% → 97.3% (+8.84%)

---

Coverage comparison generated by scripts/ci/compare-coverage.ts

[github-actions]

Smoke Test Results

• ✅ Playwright: github.com title verified
• ✅ File Writing: test file created
• ✅ Bash Tool: file verified
• ❌ GitHub MCP: auth failed (401)

Status: 3/4 tests passed

💥 [THE END] — Illustrated by Smoke Claude

[github-actions]

Smoke Test: Copilot BYOK (Offline) Mode

Test	Result
GitHub MCP connectivity	❌ (401 - GitHub MCP auth unavailable in this run)
GitHub.com HTTP	❌ (pre-step template vars not resolved: ${{ steps.smoke-data.outputs.SMOKE_HTTP_CODE }})
File write/read	❌ (pre-step template vars not resolved)
BYOK inference (agent → api-proxy → api.githubcopilot.com)	✅

Running in BYOK offline mode (COPILOT_OFFLINE=true) via api-proxy → api.githubcopilot.com.

Overall: FAIL — pre-step data was not injected (template variables unresolved). BYOK inference path itself is ✅.

🔑 BYOK report filed by Smoke Copilot BYOK

[github-actions]

🤖 Smoke Test Results

Test	Status
GitHub MCP connectivity	❌ (401 – unauthenticated)
GitHub.com HTTP	⚠️ pre-step data not injected
File write/read	✅ smoke file exists and readable

Overall: PARTIAL

Author: @copilot

📰 BREAKING: Report filed by Smoke Copilot

[github-actions]

Smoke Test

PRs: fix: unexport test-only command option types; refactor: extract shared logger mock factory to test-utils
GitHub MCP ❌; safeinputs-gh ❌; Playwright ✅; Tavily ❌
File write ✅; Bash read ✅; Discussion comment ✅; Build ✅
Overall status: FAIL

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• registry.npmjs.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "registry.npmjs.org"

See Network Configuration for more information.

🔮 The oracle has spoken through Smoke Codex

[Copilot]

Pull request overview

Adds additional Jest unit tests to exercise previously uncovered branches in src/host-iptables.ts, increasing confidence in security-sensitive host iptables rule setup/cleanup behavior without requiring real Docker/iptables execution.

Changes:

• Add new setupHostIptables tests covering cliProxyConfig host-gateway allow rules (including missing Docker bridge gateway).
• Add new IPv6 DNS tests covering ip6tables available/unavailable paths and existing IPv6 chain cleanup.
• Add targeted tests for error/edge branches: DOCKER-USER chain creation failure, invalid Docker bridge gateway IPv4 handling, and cleanup behavior when bridge name is unavailable.

Show a summary per file

File	Description
src/host-iptables.test.ts	Adds 8 new deterministic tests to cover additional host-iptables.ts branches (cli proxy host access, IPv6 DNS handling, and cleanup/error edge cases).

Copilot's findings

Tip

Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

• Files reviewed: 1/1 changed files
• Comments generated: 0

[github-actions]

Smoke Test Results

• Redis PING: ❌ (connection timeout — host.docker.internal unreachable)
• PostgreSQL pg_isready: ❌ (no response)
• PostgreSQL SELECT 1: ❌ (not attempted)

Overall: FAIL — service containers are not reachable from this environment. host.docker.internal does not resolve/connect (no Docker bridge networking available in this runner context).

🔌 Service connectivity validated by Smoke Services

[github-actions]

🏗️ Build Test Suite Results

Ecosystem	Project	Build/Install	Tests	Status
Bun	elysia	✅	1/1 passed	✅ PASS
Bun	hono	✅	1/1 passed	✅ PASS
C++	fmt	✅	N/A	✅ PASS
C++	json	✅	N/A	✅ PASS
Deno	oak	N/A	1/1 passed	✅ PASS
Deno	std	N/A	1/1 passed	✅ PASS
.NET	hello-world	✅	N/A	✅ PASS
.NET	json-parse	✅	N/A	✅ PASS
Go	color	✅	1/1 passed	✅ PASS
Go	env	✅	1/1 passed	✅ PASS
Go	uuid	✅	1/1 passed	✅ PASS
Java	gson	✅	1/1 passed	✅ PASS
Java	caffeine	✅	1/1 passed	✅ PASS
Node.js	clsx	✅	all passed	✅ PASS
Node.js	execa	✅	all passed	✅ PASS
Node.js	p-limit	✅	all passed	✅ PASS
Rust	fd	✅	1/1 passed	✅ PASS
Rust	zoxide	✅	1/1 passed	✅ PASS

Overall: 8/8 ecosystems passed — ✅ PASS

Generated by Build Test Suite for issue #2829 · ● 527.1K · ◷

[github-actions]

🧪 Chroot Runtime Version Comparison

Runtime	Host Version	Chroot Version	Match?
Python	Python 3.12.13	Python 3.12.3	❌ NO
Node.js	v24.14.1	v20.20.2	❌ NO
Go	go1.22.12	go1.22.12	✅ YES

Result: ❌ Not all tests passed — Python and Node.js versions differ between host and chroot.

Tested by Smoke Chroot